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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Cape Verde Islands (1)
-
East Africa
-
Ethiopia (1)
-
Kenya (2)
-
Tanzania
-
Oldoinyo Lengai (1)
-
-
Turkana Basin (1)
-
-
North Africa
-
Egypt (1)
-
-
West Africa
-
Ivory Coast (1)
-
-
-
Altiplano (1)
-
Antarctica (1)
-
Arctic Ocean
-
Barents Sea (1)
-
Chukchi Sea (1)
-
-
Asia
-
Central Asia
-
Kazakhstan
-
Aktyubinsk Kazakhstan
-
Zhamanshin Crater (1)
-
-
-
-
Far East
-
Indochina (1)
-
Indonesia
-
Sumatra
-
Toba Lake (4)
-
-
-
Japan
-
Hokkaido (1)
-
Honshu
-
Akita Japan (2)
-
Tottori Japan (1)
-
-
Kyushu
-
Kagoshima Japan
-
Aira Caldera (1)
-
Sakura-jima (2)
-
-
-
-
Malaysia (1)
-
Philippine Islands
-
Luzon
-
Mount Pinatubo (4)
-
-
-
Vietnam
-
Dalat Vietnam (1)
-
-
-
Indian Peninsula
-
India
-
Deccan Plateau (2)
-
Maharashtra India
-
Poona India (3)
-
-
-
-
Kamchatka Russian Federation
-
Kamchatka Peninsula (1)
-
-
Middle East
-
Cyprus
-
Troodos Massif (1)
-
-
Turkey
-
Anatolia (2)
-
-
-
-
Atlantic Ocean
-
Mid-Atlantic Ridge (6)
-
North Atlantic
-
Bay of Biscay (1)
-
Gulf of Mexico (1)
-
Vema fracture zone (1)
-
-
South Atlantic (2)
-
-
Atlantic Ocean Islands
-
Azores (1)
-
Canary Islands (1)
-
Cape Verde Islands (1)
-
-
Atlantic region (1)
-
Australasia
-
Australia
-
Tasmania Australia (1)
-
-
New Zealand
-
Okataina volcanic centre (1)
-
Rotorua New Zealand (2)
-
Taranaki New Zealand (1)
-
Taupo volcanic zone (3)
-
-
Papua New Guinea
-
Bismarck Archipelago
-
Rabaul Caldera (1)
-
-
-
-
Canada
-
Western Canada
-
British Columbia (1)
-
Manitoba (1)
-
Saskatchewan (2)
-
Yukon Territory
-
Klondike (1)
-
-
-
-
Caribbean region
-
West Indies
-
Antilles
-
Lesser Antilles
-
Martinique
-
Mount Pelee (1)
-
-
Saint Vincent (2)
-
Soufriere (2)
-
-
-
-
-
Cascade Range (2)
-
Cascadia subduction zone (1)
-
Central America
-
Costa Rica
-
Nicoya Peninsula (1)
-
-
Guatemala (2)
-
-
Central Cordillera (1)
-
Coast Ranges (3)
-
Commonwealth of Independent States
-
Caucasus
-
Greater Caucasus (1)
-
-
Kazakhstan
-
Aktyubinsk Kazakhstan
-
Zhamanshin Crater (1)
-
-
-
Russian Federation
-
Kamchatka Russian Federation
-
Kamchatka Peninsula (1)
-
-
-
-
Crater Lake (1)
-
East Pacific Ocean Islands
-
Easter Island (2)
-
Galapagos Islands (2)
-
Hawaii
-
Hawaii County Hawaii
-
Hawaii Island
-
Kilauea (3)
-
Kona (1)
-
Puu Oo (1)
-
-
-
Honolulu County Hawaii
-
Oahu (1)
-
-
Kauai County Hawaii (1)
-
Mauna Loa (2)
-
-
-
Espanola Basin (1)
-
Europe
-
Alps
-
Eastern Alps
-
Dolomites (1)
-
-
-
Caucasus
-
Greater Caucasus (1)
-
-
Central Europe
-
Austria
-
Salzkammergut (1)
-
-
Slovakia (2)
-
-
Southern Europe
-
Bulgaria (3)
-
Greece
-
Greek Aegean Islands
-
Cyclades
-
Santorin (1)
-
-
-
-
Italy
-
Campania Italy
-
Vesuvius (2)
-
-
Latium Italy (1)
-
Sardinia Italy (1)
-
Sicily Italy
-
Lipari Islands
-
Lipari Island (1)
-
-
Mount Etna (2)
-
-
-
Rhodope Mountains (1)
-
-
Western Europe
-
France
-
Central Massif (1)
-
-
Iceland
-
Eyjafjallajokull (1)
-
Krafla (1)
-
Reykjanes Peninsula (1)
-
-
United Kingdom
-
Great Britain
-
Scotland
-
Argyllshire Scotland
-
Mull Island (1)
-
-
Hebrides
-
Inner Hebrides
-
Mull Island (1)
-
-
-
-
-
-
-
-
Explorer Plate (1)
-
Fuego (1)
-
Glass Mountains (1)
-
Indian Ocean
-
Red Sea (1)
-
-
Indian Ocean Islands
-
Mascarene Islands
-
Reunion (1)
-
-
-
International Ocean Discovery Program
-
Expedition 349
-
IODP Site U1431 (1)
-
IODP Site U1433 (1)
-
IODP Site U1434 (1)
-
-
-
La Palma (1)
-
Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Cyclades
-
Santorin (1)
-
-
-
-
-
Mediterranean Sea
-
West Mediterranean (1)
-
-
Mexico
-
Guanajuato Mexico (2)
-
Mexico state (1)
-
Trans-Mexican volcanic belt (2)
-
Valley of Mexico (1)
-
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
Great Plains
-
Northern Great Plains (1)
-
-
Gulf Coastal Plain (3)
-
North American Cordillera (2)
-
Rio Grande Rift (1)
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
-
-
North Island (4)
-
Oceania
-
Melanesia
-
Vanuatu (1)
-
-
Polynesia
-
French Polynesia
-
Society Islands (2)
-
-
Hawaii
-
Hawaii County Hawaii
-
Hawaii Island
-
Kilauea (3)
-
Kona (1)
-
Puu Oo (1)
-
-
-
Honolulu County Hawaii
-
Oahu (1)
-
-
Kauai County Hawaii (1)
-
Mauna Loa (2)
-
-
Pitcairn Island (2)
-
-
-
Pacific Ocean
-
Central Pacific (1)
-
East Pacific
-
Cocos Ridge (2)
-
East Pacific Rise (4)
-
Galapagos Rift (2)
-
Northeast Pacific
-
Escanaba Trough (1)
-
Gorda Rise (1)
-
Gulf of Alaska (1)
-
Juan de Fuca Ridge
-
Cleft Segment (1)
-
-
Loihi Seamount (2)
-
-
Southeast Pacific
-
Lau Basin (1)
-
-
-
Equatorial Pacific (1)
-
North Pacific
-
Northeast Pacific
-
Escanaba Trough (1)
-
Gorda Rise (1)
-
Gulf of Alaska (1)
-
Juan de Fuca Ridge
-
Cleft Segment (1)
-
-
Loihi Seamount (2)
-
-
Northwest Pacific
-
Japan Sea (1)
-
Japan Trench (1)
-
Shatsky Rise (1)
-
South China Sea (3)
-
-
-
South Pacific
-
Southeast Pacific
-
Lau Basin (1)
-
-
Southwest Pacific
-
Bismarck Sea
-
Manus Basin
-
PACMANUS hydrothermal field (1)
-
-
-
-
-
West Pacific
-
Northwest Pacific
-
Japan Sea (1)
-
Japan Trench (1)
-
Shatsky Rise (1)
-
South China Sea (3)
-
-
Ontong Java Plateau (1)
-
Southwest Pacific
-
Bismarck Sea
-
Manus Basin
-
PACMANUS hydrothermal field (1)
-
-
-
-
-
-
Puna (2)
-
Saint Helena (1)
-
San Andreas Fault (1)
-
Scotia Ridge (1)
-
Sierra Nevada (3)
-
South America
-
Andes
-
Central Andes (5)
-
Galeras (1)
-
Northern Andes (1)
-
-
Argentina (3)
-
Bolivia
-
Oruro Bolivia (1)
-
-
Chile (1)
-
Colombia
-
Galeras (1)
-
-
Ecuador (1)
-
Peru (1)
-
-
Southern Ocean
-
Ross Sea
-
McMurdo Sound (2)
-
-
-
United States
-
Alaska
-
Redoubt (1)
-
Valdez Alaska (1)
-
Valley of Ten Thousand Smokes (1)
-
-
California
-
Alameda County California
-
Lawrence Livermore National Laboratory (1)
-
-
Colusa County California (1)
-
Contra Costa County California (1)
-
Feather River (1)
-
Glenn County California (1)
-
Inyo County California
-
Inyo Mountains (1)
-
-
Lake County California (1)
-
Mono County California
-
Inyo Domes (1)
-
Long Valley Caldera (1)
-
Mono Craters (2)
-
Mono Lake (1)
-
Obsidian Dome (1)
-
-
Northern California (3)
-
San Francisco Bay region (1)
-
Santa Barbara County California (1)
-
Southern California (1)
-
-
Colorado
-
Summit County Colorado
-
Dillon Colorado (1)
-
-
-
Columbia Plateau (2)
-
Great Basin (1)
-
Hawaii
-
Hawaii County Hawaii
-
Hawaii Island
-
Kilauea (3)
-
Kona (1)
-
Puu Oo (1)
-
-
-
Honolulu County Hawaii
-
Oahu (1)
-
-
Kauai County Hawaii (1)
-
Mauna Loa (2)
-
-
Idaho
-
Cassia County Idaho (1)
-
Elmore County Idaho (1)
-
Snake River plain (5)
-
-
Louisiana
-
Catahoula Parish Louisiana (1)
-
-
Mississippi (1)
-
Nebraska
-
Antelope County Nebraska (1)
-
Morrill County Nebraska (1)
-
-
Nevada
-
Esmeralda County Nevada
-
Silver Peak Mountains (1)
-
-
Nevada Test Site (1)
-
Nye County Nevada
-
Yucca Mountain (1)
-
-
-
New Mexico
-
Jemez Mountains (4)
-
Sandoval County New Mexico (2)
-
Valles Caldera (2)
-
-
Oregon
-
Clackamas County Oregon (1)
-
Klamath County Oregon
-
Mount Mazama (1)
-
-
Lincoln County Oregon (1)
-
Multnomah County Oregon
-
Portland Oregon (1)
-
-
-
Texas
-
Jasper County Texas (1)
-
Live Oak County Texas (1)
-
-
Trans-Pecos (1)
-
Utah
-
Box Elder County Utah (1)
-
Juab County Utah (1)
-
Millard County Utah (1)
-
Tooele County Utah (1)
-
-
Washington
-
Franklin County Washington (1)
-
Kittitas County Washington (1)
-
-
Western U.S. (2)
-
Wyoming
-
Heart Mountain Fault (1)
-
Park County Wyoming (1)
-
-
Yellowstone National Park (1)
-
Yellowstone River (1)
-
-
Windward Islands (1)
-
Yuba River (1)
-
Yucatan Peninsula (1)
-
-
commodities
-
bentonite deposits (1)
-
brines (1)
-
clay deposits (1)
-
construction materials (1)
-
geothermal energy (2)
-
metal ores
-
gold ores (1)
-
iron ores (1)
-
lithium ores (1)
-
platinum ores (1)
-
uranium ores (1)
-
-
mineral deposits, genesis (3)
-
mineral exploration (1)
-
zeolite deposits (1)
-
-
elements, isotopes
-
boron (1)
-
carbon
-
C-13/C-12 (1)
-
C-14 (2)
-
organic carbon (1)
-
-
chemical ratios (6)
-
halogens
-
bromine (1)
-
chlorine
-
Cl-37/Cl-35 (1)
-
-
fluorine (1)
-
iodine (1)
-
-
hydrogen
-
D/H (9)
-
-
isotope ratios (30)
-
isotopes
-
radioactive isotopes
-
Ar-38/Ar-36 (1)
-
C-14 (2)
-
Cs-137 (1)
-
Pb-206/Pb-204 (8)
-
Pb-207/Pb-204 (4)
-
Pb-208/Pb-204 (4)
-
Pb-210 (1)
-
Rb-87/Sr-86 (1)
-
Th-232/Th-230 (1)
-
U-238/Th-230 (1)
-
U-238/Th-232 (1)
-
-
stable isotopes
-
Al-27 (1)
-
Ar-38/Ar-36 (1)
-
Ar-40/Ar-36 (1)
-
C-13/C-12 (1)
-
Cl-37/Cl-35 (1)
-
D/H (9)
-
He-4/He-3 (1)
-
Nd-144/Nd-143 (7)
-
Ne-22/Ne-20 (1)
-
Ne-22/Ne-21 (1)
-
O-18/O-16 (4)
-
Os-188/Os-187 (1)
-
Pb-206/Pb-204 (8)
-
Pb-207/Pb-204 (4)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (4)
-
Pb-208/Pb-206 (1)
-
Rb-87/Sr-86 (1)
-
S-36 (1)
-
Si-29 (1)
-
Sr-87/Sr-86 (14)
-
-
-
metals
-
actinides
-
thorium
-
Th-232/Th-230 (1)
-
U-238/Th-230 (1)
-
U-238/Th-232 (1)
-
-
uranium
-
U-238/Th-230 (1)
-
U-238/Th-232 (1)
-
-
-
alkali metals
-
cesium
-
Cs-137 (1)
-
-
lithium (2)
-
potassium (7)
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
sodium (1)
-
-
alkaline earth metals
-
barium (1)
-
magnesium (1)
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (14)
-
-
-
aluminum
-
Al-27 (1)
-
-
chromium (1)
-
copper (1)
-
gallium (1)
-
gold (1)
-
hafnium (1)
-
iron
-
ferric iron (1)
-
ferrous iron (1)
-
-
lead
-
Pb-206/Pb-204 (8)
-
Pb-207/Pb-204 (4)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (4)
-
Pb-208/Pb-206 (1)
-
Pb-210 (1)
-
-
manganese (1)
-
nickel (2)
-
niobium (1)
-
platinum group
-
osmium
-
Os-188/Os-187 (1)
-
-
platinum (1)
-
platinum ores (1)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (7)
-
-
ytterbium (1)
-
-
rhenium (1)
-
tantalum (1)
-
tin (1)
-
zirconium (1)
-
-
nitrogen
-
organic nitrogen (1)
-
-
noble gases
-
argon
-
Ar-38/Ar-36 (1)
-
Ar-40/Ar-36 (1)
-
-
helium
-
He-4/He-3 (1)
-
-
neon
-
Ne-22/Ne-20 (1)
-
Ne-22/Ne-21 (1)
-
-
-
oxygen
-
O-18/O-16 (4)
-
-
phosphorus (2)
-
selenium (1)
-
silicon
-
Si-29 (1)
-
-
sulfur
-
S-36 (1)
-
-
-
fossils
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Artiodactyla
-
Ruminantia
-
Bovidae
-
Bos (1)
-
-
-
-
Perissodactyla
-
Hippomorpha
-
Equidae
-
Equus (1)
-
-
-
-
Primates
-
Hominidae
-
Homo
-
Homo erectus (1)
-
Homo habilis (1)
-
-
-
simians (1)
-
-
Proboscidea
-
Elephantoidea
-
Elephantidae
-
Elephas (1)
-
-
-
-
-
-
-
-
-
-
fungi (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda (1)
-
-
Insecta
-
Pterygota
-
Neoptera
-
Endopterygota
-
Coleoptera (1)
-
-
-
-
-
-
-
Mollusca
-
Gastropoda (1)
-
-
Protista
-
Foraminifera
-
Textulariina (1)
-
-
Radiolaria (1)
-
Silicoflagellata (1)
-
-
-
microfossils (4)
-
palynomorphs (1)
-
Plantae
-
algae
-
diatoms (1)
-
nannofossils (1)
-
-
-
thallophytes (2)
-
-
geochronology methods
-
Ar/Ar (14)
-
exposure age (1)
-
fission-track dating (7)
-
hydration of glass (2)
-
K/Ar (5)
-
paleomagnetism (10)
-
tephrochronology (21)
-
Th/U (1)
-
thermochronology (1)
-
thermoluminescence (2)
-
U/Pb (3)
-
uranium disequilibrium (1)
-
-
geologic age
-
Cenozoic
-
Koobi Fora Formation (1)
-
middle Cenozoic (1)
-
Quaternary
-
Holocene
-
Neolithic (1)
-
upper Holocene (3)
-
-
Pleistocene
-
Bandelier Tuff (2)
-
Bishop Tuff (3)
-
Irvingtonian (1)
-
lower Pleistocene (1)
-
middle Pleistocene (4)
-
upper Pleistocene
-
Wisconsinan (1)
-
-
-
upper Quaternary
-
Brunhes Chron (1)
-
-
-
Stone Age
-
Neolithic (1)
-
Paleolithic
-
Acheulian (1)
-
-
-
Tertiary
-
Catahoula Formation (3)
-
John Day Formation (3)
-
Neogene
-
Miocene
-
Columbia River Basalt Group (2)
-
Ellensburg Formation (1)
-
Frenchman Springs Member (1)
-
lower Miocene
-
Saucesian (1)
-
-
middle Miocene
-
Luisian (1)
-
-
Mohnian (1)
-
Paintbrush Tuff (1)
-
Relizian (1)
-
Tiva Canyon Member (1)
-
upper Miocene (1)
-
-
Ogallala Formation (1)
-
Pliocene
-
upper Pliocene (1)
-
-
upper Neogene (2)
-
-
Paleogene
-
Eocene (3)
-
Oligocene
-
Glendon Limestone (1)
-
lower Oligocene
-
Rupelian (1)
-
-
-
Paleocene
-
lower Paleocene (1)
-
-
Renova Formation (1)
-
White River Group (1)
-
-
-
upper Cenozoic (3)
-
-
Lake Bonneville (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (1)
-
Upper Cretaceous (1)
-
-
Franciscan Complex (1)
-
Jurassic
-
Lower Jurassic
-
Hettangian (1)
-
Triassic-Jurassic boundary (1)
-
-
Upper Jurassic
-
Morrison Formation (1)
-
-
-
Nicoya Complex (1)
-
Triassic
-
Upper Triassic
-
Norian (1)
-
Rhaetian (1)
-
Triassic-Jurassic boundary (1)
-
-
-
-
Paleozoic
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Cambrian
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Mount Read Volcanics (1)
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lower Paleozoic (1)
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Ordovician (1)
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Precambrian
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Rice Lake Group (1)
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upper Precambrian
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Proterozoic (1)
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igneous rocks
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extrusive rocks (1)
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igneous rocks
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carbonatites (1)
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plutonic rocks
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diorites
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trondhjemite (2)
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granites
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felsite (1)
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ultramafics
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peridotites
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spinel peridotite (1)
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pyroxenite
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clinopyroxenite (1)
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garnet pyroxenite (2)
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-
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porphyry
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vitrophyre (1)
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volcanic rocks
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andesites
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boninite (1)
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basalts
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alkali basalts
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hawaiite (1)
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mugearite (1)
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trachybasalts (1)
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flood basalts (1)
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mid-ocean ridge basalts (8)
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olivine tholeiite (1)
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basanite (2)
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dacites (3)
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glasses
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obsidian (11)
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palagonite (7)
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volcanic glass (192)
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keratophyre (1)
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nephelinite (2)
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phonolites (1)
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pyroclastics
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hyaloclastite (4)
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ignimbrite (12)
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pumice (18)
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tuff (18)
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vitrophyre (1)
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ophiolite (2)
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volcanic ash (21)
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wehrlite (1)
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metamorphic rocks
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metamorphic rocks
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impactites
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migmatites (1)
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ophiolite (2)
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meteorites
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meteorites
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minerals
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carbonates
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hydrates (1)
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minerals (10)
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hydroxides
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iron oxides (1)
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phosphates
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silicates
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aluminosilicates (1)
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chain silicates
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amphibole group
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clinoamphibole
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hornblende (1)
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pyroxene group
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clinopyroxene (2)
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orthopyroxene
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hypersthene (1)
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framework silicates
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feldspar group
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alkali feldspar
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sanidine (4)
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plagioclase
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albite (1)
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anorthite (1)
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bytownite (1)
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oligoclase (1)
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nepheline group
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silica minerals
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cristobalite (2)
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opal (1)
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quartz (5)
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tridymite (1)
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zeolite group
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analcime (3)
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heulandite (2)
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mesolite (1)
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phillipsite (1)
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thomsonite (1)
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wairakite (2)
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-
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orthosilicates
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nesosilicates
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garnet group (1)
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olivine group
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olivine (3)
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zircon group
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zircon (6)
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sheet silicates
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apophyllite (1)
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chlorite group
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chlorite (2)
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clay minerals
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corrensite (2)
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illite (6)
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mica group
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paragonite (1)
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sulfates
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sulfides
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wehrlite (1)
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Primary terms
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absolute age (22)
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Africa
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Asia
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Far East
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Japan
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Malaysia (1)
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Indian Peninsula
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Kamchatka Russian Federation
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Middle East
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Turkey
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Atlantic Ocean
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atmosphere (3)
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Australia
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Papua New Guinea
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bentonite deposits (1)
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boron (1)
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brines (1)
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Canada
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Yukon Territory
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carbon
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C-13/C-12 (1)
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C-14 (2)
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organic carbon (1)
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Caribbean region
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West Indies
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Antilles
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Lesser Antilles
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Martinique
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Mount Pelee (1)
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Saint Vincent (2)
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Soufriere (2)
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Cenozoic
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Koobi Fora Formation (1)
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middle Cenozoic (1)
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Quaternary
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Holocene
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Neolithic (1)
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upper Holocene (3)
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Pleistocene
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Bandelier Tuff (2)
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Irvingtonian (1)
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lower Pleistocene (1)
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middle Pleistocene (4)
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upper Pleistocene
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Wisconsinan (1)
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-
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upper Quaternary
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Brunhes Chron (1)
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-
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Stone Age
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Neolithic (1)
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Paleolithic
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Acheulian (1)
-
-
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Tertiary
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Catahoula Formation (3)
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John Day Formation (3)
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Neogene
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Miocene
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Columbia River Basalt Group (2)
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Ellensburg Formation (1)
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Frenchman Springs Member (1)
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lower Miocene
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Saucesian (1)
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middle Miocene
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Luisian (1)
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Mohnian (1)
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Paintbrush Tuff (1)
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Relizian (1)
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Tiva Canyon Member (1)
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upper Miocene (1)
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Ogallala Formation (1)
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Pliocene
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upper Pliocene (1)
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upper Neogene (2)
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Paleogene
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Eocene (3)
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Oligocene
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Glendon Limestone (1)
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lower Oligocene
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Rupelian (1)
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-
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Paleocene
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lower Paleocene (1)
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Renova Formation (1)
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White River Group (1)
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upper Cenozoic (3)
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Central America
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Costa Rica
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Nicoya Peninsula (1)
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Guatemala (2)
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chemical analysis (3)
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Chordata
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Vertebrata
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Artiodactyla
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Ruminantia
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Bovidae
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Bos (1)
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Perissodactyla
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Hippomorpha
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Equidae
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Equus (1)
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Primates
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Hominidae
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Homo
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Homo erectus (1)
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Homo habilis (1)
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simians (1)
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Proboscidea
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Elephantoidea
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Elephantidae
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Elephas (1)
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-
-
-
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-
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clay deposits (1)
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clay mineralogy (19)
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climate change (2)
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construction materials (1)
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crust (10)
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crystal chemistry (2)
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crystal growth (9)
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crystal structure (3)
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Deep Sea Drilling Project
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IPOD
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Leg 66 (1)
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Leg 67 (1)
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Leg 73
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DSDP Site 519 (1)
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-
Leg 82
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DSDP Site 556 (1)
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Leg 84 (1)
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Leg 34
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DSDP Site 320 (1)
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Leg 37
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DSDP Site 335 (2)
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deformation (3)
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diagenesis (11)
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Earth (1)
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earthquakes (2)
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East Pacific Ocean Islands
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Hawaii
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Hawaii County Hawaii
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Kilauea (3)
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Puu Oo (1)
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Honolulu County Hawaii
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Oahu (1)
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Kauai County Hawaii (1)
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Mauna Loa (2)
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ecology (1)
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economic geology (1)
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Europe
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Alps
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Eastern Alps
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Caucasus
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Central Europe
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Austria
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Southern Europe
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Italy
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Latium Italy (1)
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Rhodope Mountains (1)
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Western Europe
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France
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Iceland
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United Kingdom
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Argyllshire Scotland
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Mull Island (1)
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Hebrides
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Inner Hebrides
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explosions (1)
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faults (7)
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fractures (1)
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geochemistry (69)
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geochronology (14)
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geothermal energy (2)
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ground water (2)
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hydrogen
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D/H (9)
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igneous rocks
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carbonatites (1)
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plutonic rocks
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diorites
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trondhjemite (2)
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granites
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felsite (1)
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ultramafics
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peridotites
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spinel peridotite (1)
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pyroxenite
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clinopyroxenite (1)
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garnet pyroxenite (2)
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-
-
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porphyry
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vitrophyre (1)
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volcanic rocks
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andesites
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boninite (1)
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basalts
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alkali basalts
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hawaiite (1)
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mugearite (1)
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trachybasalts (1)
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flood basalts (1)
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mid-ocean ridge basalts (8)
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ocean-island basalts (3)
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olivine tholeiite (1)
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tholeiitic basalt (2)
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basanite (2)
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dacites (3)
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glasses
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obsidian (11)
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palagonite (7)
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volcanic glass (192)
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keratophyre (1)
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nephelinite (2)
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phonolites (1)
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pyroclastics
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ash-flow tuff (6)
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hyaloclastite (4)
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ignimbrite (12)
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pumice (18)
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rhyolite tuff (3)
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scoria (5)
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tuff (18)
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welded tuff (2)
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rhyolites (10)
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trachyandesites (1)
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trachytes (1)
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vitrophyre (1)
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inclusions
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fluid inclusions (5)
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Indian Ocean
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Red Sea (1)
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Indian Ocean Islands
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Mascarene Islands
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Reunion (1)
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-
-
Integrated Ocean Drilling Program
-
Expedition 324
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IODP Site U1347 (1)
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IODP Site U1350 (1)
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-
intrusions (8)
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Invertebrata
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
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Insecta
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Pterygota
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Neoptera
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Endopterygota
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Coleoptera (1)
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-
-
-
-
-
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Mollusca
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Gastropoda (1)
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Protista
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Foraminifera
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Textulariina (1)
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Radiolaria (1)
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Silicoflagellata (1)
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-
-
isotopes
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radioactive isotopes
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Ar-38/Ar-36 (1)
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C-14 (2)
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Cs-137 (1)
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Pb-206/Pb-204 (8)
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Pb-207/Pb-204 (4)
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Pb-208/Pb-204 (4)
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Pb-210 (1)
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Rb-87/Sr-86 (1)
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Th-232/Th-230 (1)
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U-238/Th-230 (1)
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U-238/Th-232 (1)
-
-
stable isotopes
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Al-27 (1)
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Ar-38/Ar-36 (1)
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Ar-40/Ar-36 (1)
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C-13/C-12 (1)
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Cl-37/Cl-35 (1)
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D/H (9)
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He-4/He-3 (1)
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Nd-144/Nd-143 (7)
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Ne-22/Ne-20 (1)
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Ne-22/Ne-21 (1)
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O-18/O-16 (4)
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Os-188/Os-187 (1)
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Pb-206/Pb-204 (8)
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Pb-207/Pb-204 (4)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (4)
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Pb-208/Pb-206 (1)
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Rb-87/Sr-86 (1)
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S-36 (1)
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Si-29 (1)
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Sr-87/Sr-86 (14)
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-
-
lava (26)
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magmas (45)
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mantle (15)
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Mediterranean region
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Aegean Islands
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Greek Aegean Islands
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Cyclades
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Santorin (1)
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-
-
-
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Mediterranean Sea
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West Mediterranean (1)
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-
Mesozoic
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Cretaceous
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Lower Cretaceous (1)
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Upper Cretaceous (1)
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Franciscan Complex (1)
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Jurassic
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Lower Jurassic
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Hettangian (1)
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Triassic-Jurassic boundary (1)
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-
Upper Jurassic
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Morrison Formation (1)
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Nicoya Complex (1)
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Triassic
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Upper Triassic
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Norian (1)
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Rhaetian (1)
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Triassic-Jurassic boundary (1)
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metal ores
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lithium ores (1)
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platinum ores (1)
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uranium ores (1)
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metals
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actinides
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thorium
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Th-232/Th-230 (1)
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U-238/Th-230 (1)
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U-238/Th-232 (1)
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-
uranium
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U-238/Th-230 (1)
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U-238/Th-232 (1)
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-
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alkali metals
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cesium
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Cs-137 (1)
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lithium (2)
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potassium (7)
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rubidium
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Rb-87/Sr-86 (1)
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sodium (1)
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alkaline earth metals
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magnesium (1)
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strontium
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Rb-87/Sr-86 (1)
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Sr-87/Sr-86 (14)
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-
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aluminum
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Al-27 (1)
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chromium (1)
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gold (1)
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iron
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ferric iron (1)
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ferrous iron (1)
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lead
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Pb-206/Pb-204 (8)
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Pb-207/Pb-204 (4)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (4)
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Pb-208/Pb-206 (1)
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Pb-210 (1)
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manganese (1)
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nickel (2)
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niobium (1)
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platinum group
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osmium
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Os-188/Os-187 (1)
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platinum (1)
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platinum ores (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (7)
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ytterbium (1)
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rhenium (1)
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tantalum (1)
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tin (1)
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zirconium (1)
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metamorphic rocks
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impactites
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impact breccia
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lunar breccia (1)
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migmatites (1)
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slates (1)
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metamorphism (3)
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metasomatism (21)
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meteorites
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stony meteorites
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chondrites
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carbonaceous chondrites
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CI chondrites (1)
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Mexico
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Guanajuato Mexico (2)
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mineral deposits, genesis (3)
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Moon (2)
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nitrogen
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organic nitrogen (1)
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noble gases
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argon
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Ar-38/Ar-36 (1)
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Ar-40/Ar-36 (1)
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helium
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He-4/He-3 (1)
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neon
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Ne-22/Ne-20 (1)
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Ne-22/Ne-21 (1)
-
-
-
North America
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Basin and Range Province
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Great Basin (1)
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Great Plains
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Northern Great Plains (1)
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Gulf Coastal Plain (3)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
volcanic glass
SPECIFICS OF LATE HOLOCENE SEDIMENTATION IN THE CHUKCHI SEA INFERRED FROM GRAIN SIZE AND MINERALOGICAL ANALYSES OF BOTTOM SEDIMENTS Available to Purchase
Groundmass pyroxene crystal habits (trachts) record syneruptive magma dynamics in glassy pyroclasts Available to Purchase
A new procedure for volcanic glass hydrogen isotope studies of tuffaceous sediments and its application in the North American Cordillera Available to Purchase
Electron probe microanalysis of trace sulfur in experimental basaltic glasses and silicate minerals Available to Purchase
Solfataric alteration at the South Sulfur Bank, Kilauea, Hawaii, as a mechanism for the formation of sulfates, phyllosilicates, and silica on Mars Open Access
Timing and evolution of structures within the southeastern Greater Caucasus and Kura Fold-Thrust Belt from multiproxy sediment provenance records Open Access
Formation Conditions of Ignimbrites of the Khangar Volcano (Kamchatka) Available to Purchase
Rehydrated glass embayments record the cooling of a Yellowstone ignimbrite Open Access
Crystal habit (tracht) of groundmass pyroxene crystals recorded magma ascent paths during the 2011 Shinmoedake eruption Available to Purchase
Petrology of the explosive deposits from the April 2021 eruption of La Soufrière volcano, St Vincent: a time-series analysis of microlites Open Access
Abstract After more than three months of lava dome extrusion, La Soufrière (St Vincent) transitioned to a series of explosive eruptions in April 2021. Here we present a time-series petrologic analysis of the phenocryst and microlite populations during the first c. 48 h of explosivity to constrain ascent conditions and processes that drove changes in behaviour. Primary eruptive products were crystal-rich (45–50 vol%) basaltic andesites with similar phenocryst phase assemblages and compositions. The change in eruptive style is consistent with overpressurization as a consequence of second boiling from anhydrous microlite crystallization. The microlites display variation between the explosive phases, with two populations: (1) ‘inherited’ − normally zoned high-An plagioclase (>An 70) + olivine (Fo 62–79) + clinopyroxene + titanomagnetite, inferred to have crystallized at depths >15 km and high water pressures; (2) ‘juvenile’ − unzoned plagioclase (An 45–65) + clinopyroxene + orthopyroxene + intermediate pyroxene (Wo 12–38) + titanomagnetite, inferred to have crystallized upon ascent due to decompression and degassing. Scoria from the first explosions featured extensive groundmass crystallization and a significant ‘inherited’ microlite population. Later explosions had a more abundant ‘juvenile’ microlite population and lower crystallinity, consistent with more rapid ascent from depth, initiated by decompression following initial blasts and destruction of the lava dome.
Endogenous Lunar Volatiles Available to Purchase
Characterization of Hydrothermal Alteration in Palagonitized Deposits Using Short-Wave Infrared Spectroscopy and X-Ray Diffraction Methods Available to Purchase
40 Ar/ 39 Ar eruption ages of Turkana Basin tuffs: millennial-scale resolution constrains palaeoclimate proxy tuning models and hominin fossil ages Open Access
Insight into a rift volcanism with the petrogenesis of ultramafic enclaves and the host basalts: Kula Volcanic Field, Western Anatolia, Turkey Available to Purchase
Volcaniclastic deposits and sedimentation processes around volcanic ocean islands: the central Azores Available to Purchase
Abstract Geological histories of volcanic ocean islands can be revealed by the sediments shed by them. Hence there is an interest in studying cores of volcaniclastic sediments that are particularly preserved in the many flat-floored basins lying close to the Azores islands. We analyse four gravity cores collected around the central group of the islands. Three sedimentary facies (F1-F2a, F2b) are recognized based on visual core logging, particle morphometric and geochemical analyses. F1 is clay-rich hemipelagite comprising homogeneous mud with mottled structures from bioturbation. F2a and F2b are both clay-poor volcaniclastic deposits, which are carbonate-rich and carbonate-poor, respectively. More biogenic carbonate in F2a reflects the incorporation of unconsolidated calcareous material from island shelves or bioturbation. Within F2a and F2b we identify deposits emplaced by pyroclastic fallout, primary or secondary turbidity currents by combining multiple information from lithological composition, sedimentary structures, chemical composition of volcanic glass shards and morphometric characteristics of volcanic particles. Primary volcaniclastic sediments were found in all four cores, echoing activity known to have occurred up to historical times on the adjacent islands. These preliminary results suggest that greater details of geological events could be inferred for other volcanic islands by adopting a similar approach to core analysis.
Tephra layers in the marine environment: a review of properties and emplacement processes Open Access
Abstract This review focuses on the recognition of volcanic ash occurrences in marine sediment cores and on using their appearance and properties to deduce their origin. Widespread marine tephra layers are important marker horizons for both volcanological as well as general geological investigations. We describe ash detection by visual inspection and logging of sediment cores. Ash layer structure and texture, particle morphologies and lithological compositions of primary volcanic deposits are summarized and processes modifying them are discussed, both natural processes acting on and in the seafloor, i.e. erosion and bioturbation, and anthropogenic modifications during drilling/coring and core preparation. We discuss primary emplacement processes of marine fall and flow tephra deposits derived from either subaerial or submarine sources in order to identify distinguishing properties. We also elaborate on processes generating secondary, resedimented volcaniclastic layers such as submarine landslides and shelf erosion as well as fluvial input and ice-rafting, and how they can be distinguished from primary volcaniclastic deposits, which is essential in tephrostratigraphy. Finally, methods of tephra correlation between cores and on-land deposits/volcanoes are illustrated because they allow us to extend the 1D information from single cores to 3D distribution and facies changes of tephras and to bridge the land–sea gap.