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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
North Africa
-
Atlas Mountains
-
Moroccan Atlas Mountains
-
Anti-Atlas (3)
-
-
-
Morocco
-
Moroccan Atlas Mountains
-
Anti-Atlas (3)
-
-
-
-
-
Altiplano (1)
-
Arctic region
-
Russian Arctic
-
New Siberian Islands (1)
-
-
-
Asia
-
Altai Mountains
-
Gorny Altai (2)
-
-
Altai Russian Federation
-
Gorny Altai (2)
-
-
Altai-Sayan region (2)
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Far East
-
China
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Hubei China
-
Yichang China (2)
-
-
Hunan China (1)
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Kunlun Mountains (1)
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South China Block (1)
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Xinjiang China
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Tarim Basin (1)
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Yangtze Platform (1)
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Yangtze Three Gorges (2)
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Korea
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South Korea (1)
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Vietnam (1)
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Kopet-Dag Range (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (1)
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-
-
Middle East
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Iran
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Elburz (1)
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Turkey (1)
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Siberia (1)
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Tibetan Plateau (1)
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Tien Shan (1)
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Yakutia Russian Federation
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New Siberian Islands (1)
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-
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Australasia
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Australia (1)
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New Zealand (1)
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Avalon Zone (2)
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Bay of Islands (2)
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Bear River Range (2)
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Bell Island (2)
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Canada
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Arctic Archipelago (1)
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Cassiar Mountains (1)
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Eastern Canada
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Maritime Provinces
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New Brunswick
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Saint John County New Brunswick
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Saint John New Brunswick (1)
-
-
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Nova Scotia
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Cape Breton Island (3)
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Cobequid Fault (1)
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Yarmouth County Nova Scotia
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Yarmouth Nova Scotia (1)
-
-
-
-
Meguma Terrane (7)
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Newfoundland and Labrador
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Newfoundland
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Great Northern Peninsula (4)
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Humber Arm Allochthon (1)
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Port au Port Peninsula (4)
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Ontario
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Ottawa Ontario (2)
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Quebec
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Anticosti Island (1)
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Matane County Quebec (1)
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-
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Nunavut
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Devon Island (1)
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Queen Elizabeth Islands
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Devon Island (1)
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Western Canada
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Alberta
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Jasper National Park (2)
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British Columbia (2)
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Canadian Cordillera (1)
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Canadian Rocky Mountains (1)
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Northwest Territories (2)
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Selwyn Basin (1)
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Yukon Territory (6)
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-
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Commonwealth of Independent States
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Russian Federation
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Altai Russian Federation
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Gorny Altai (2)
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Central Urals (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (1)
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-
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Northern Urals (1)
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Pechora Basin (1)
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Polar Urals
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Pai-Khoi (1)
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Russian Arctic
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New Siberian Islands (1)
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Yakutia Russian Federation
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New Siberian Islands (1)
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Urals
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Central Urals (1)
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Northern Urals (1)
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Polar Urals
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Pai-Khoi (1)
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Southern Urals (1)
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Dunnage Melange (1)
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Europe
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Baltic region
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Estonia
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Saaremaa (1)
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Latvia (1)
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Central Europe
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Czech Republic
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Bohemia (1)
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-
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Pechora Basin (1)
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Rhenish Schiefergebirge (1)
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Southern Europe
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Iberian Peninsula
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Spain (1)
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-
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Stavelot-Venn Massif (2)
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Tornquist-Teisseyre Zone (1)
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Western Europe
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Ardennes (1)
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Belgium
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Wallonia Belgium
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Liege Belgium (1)
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France
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Armorican Massif (1)
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Central Massif
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Montagne Noire (2)
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Finistere France
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Crozon Peninsula (1)
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Tarn France (1)
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Ireland
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Galway Ireland (1)
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Mayo Ireland (1)
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Scandinavia
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Sweden
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Kalmar Sweden
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Oland (1)
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Skane Sweden (1)
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-
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United Kingdom
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Great Britain
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Bristol Channel (1)
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England
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Cumbria England (1)
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Gloucestershire England (2)
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Pennines (1)
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Shropshire England (6)
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Warwickshire England (1)
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Welsh Borderland (1)
-
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Scotland
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Ayrshire Scotland
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Girvan Scotland (1)
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Highland region Scotland (1)
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-
Wales
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Carmarthenshire Wales (1)
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Gwynedd Wales
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Arenig (3)
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Harlech Dome (1)
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Merionethshire Wales
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Arenig (3)
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South Wales (2)
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Welsh Basin (4)
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-
-
-
-
-
Lake District (5)
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Mexico
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Oaxaca Mexico (2)
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Midlands (3)
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North America
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Appalachians
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Northern Appalachians (2)
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-
Basin and Range Province
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Great Basin (2)
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North American Cordillera
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Canadian Cordillera (1)
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Rocky Mountains
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Canadian Rocky Mountains (1)
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Peel River (2)
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South America
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Andes
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Central Andes (1)
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Eastern Cordillera (5)
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Argentina
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Jujuy Argentina (4)
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Salta Argentina (6)
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San Juan Argentina (2)
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Bolivia (1)
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Brazil
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Brazilian Shield (1)
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Precordillera (2)
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Venezuela (1)
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South Island (1)
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South Mountain Batholith (1)
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United States
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Great Basin (2)
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Idaho (6)
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Nevada
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Eureka County Nevada (1)
-
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New York
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Columbia County New York (1)
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Dutchess County New York (2)
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Montgomery County New York (1)
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Saint Lawrence County New York (1)
-
Washington County New York (2)
-
-
Utah
-
Millard County Utah (3)
-
Rich County Utah (1)
-
-
Vermont
-
Franklin County Vermont (1)
-
-
Western U.S. (1)
-
-
-
commodities
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metal ores
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antimony ores (1)
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gold ores (1)
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mineral deposits, genesis (1)
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petroleum (2)
-
-
elements, isotopes
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carbon
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C-13/C-12 (9)
-
-
hydrogen
-
D/H (1)
-
-
isotope ratios (12)
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
stable isotopes
-
C-13/C-12 (9)
-
D/H (1)
-
Hf-177/Hf-176 (2)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (4)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (2)
-
-
-
metals
-
actinides
-
uranium (1)
-
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
antimony (1)
-
arsenic (1)
-
hafnium
-
Hf-177/Hf-176 (2)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
manganese (1)
-
molybdenum (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
samarium (1)
-
-
vanadium (1)
-
-
oxygen
-
O-18/O-16 (4)
-
-
sulfur
-
S-34/S-32 (1)
-
-
trace metals (1)
-
-
fossils
-
burrows (2)
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia (1)
-
-
-
-
Graptolithina
-
Dendroidea (3)
-
Graptoloidea (5)
-
-
Hemichordata (5)
-
ichnofossils
-
Cruziana (1)
-
Diplocraterion (1)
-
Planolites (1)
-
Rusophycus (1)
-
-
Invertebrata
-
Arthropoda
-
Chelicerata
-
Merostomata (1)
-
-
Mandibulata
-
Crustacea
-
Malacostraca (1)
-
Ostracoda
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Paleocopida (1)
-
-
-
Insecta
-
Pterygota
-
Neoptera
-
Endopterygota
-
Hymenoptera (1)
-
-
-
-
-
-
Trilobitomorpha
-
Trilobita
-
Agnostida (1)
-
Lichida (1)
-
Ptychopariida
-
Asaphidae (2)
-
Olenidae (3)
-
-
-
-
-
Brachiopoda
-
Articulata
-
Orthida (2)
-
-
Inarticulata
-
Lingula (1)
-
-
-
Bryozoa
-
Cryptostomata (1)
-
Trepostomata (1)
-
-
Cnidaria
-
Anthozoa (1)
-
-
Echinodermata
-
Crinozoa
-
Crinoidea (5)
-
-
Homalozoa
-
Machaeridia (1)
-
Stylophora (2)
-
-
-
Mollusca
-
Bivalvia (1)
-
Cephalopoda
-
Nautiloidea (1)
-
-
Gastropoda (1)
-
Monoplacophora (1)
-
-
Porifera (3)
-
Protista
-
Foraminifera (1)
-
Radiolaria (4)
-
-
Vermes
-
Annelida (1)
-
scolecodonts (1)
-
-
-
microfossils
-
Chitinozoa (8)
-
Conodonta (28)
-
problematic microfossils (1)
-
scolecodonts (1)
-
-
palynomorphs
-
acritarchs (15)
-
Chitinozoa (8)
-
miospores (1)
-
-
Plantae
-
algae
-
calcareous algae (1)
-
-
-
problematic fossils
-
problematic microfossils (1)
-
-
Pterobranchia (5)
-
-
geochronology methods
-
Ar/Ar (3)
-
K/Ar (1)
-
Nd/Nd (1)
-
paleomagnetism (2)
-
Rb/Sr (1)
-
Sm/Nd (3)
-
Sr/Sr (1)
-
U/Pb (10)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
-
-
Paleozoic
-
Cambrian
-
Upper Cambrian
-
Dresbachian (1)
-
Furongian (6)
-
Goldenville Formation (7)
-
Trempealeauan (1)
-
-
-
Cow Head Group (3)
-
Devonian
-
Upper Devonian
-
Famennian (1)
-
-
-
lower Paleozoic
-
Bay of Islands Ophiolite (1)
-
-
Ordovician
-
Lower Ordovician
-
Arenigian (24)
-
Fillmore Formation (4)
-
Floian (8)
-
Ibexian (3)
-
Saint George Group (4)
-
Tremadocian
-
Halifax Formation (8)
-
-
-
Meguma Group (2)
-
Middle Ordovician
-
Dapingian (4)
-
Darriwilian (7)
-
Llandeilian (4)
-
Llanvirnian (9)
-
-
Skiddaw Slates (5)
-
Upper Ordovician
-
Ashgillian (7)
-
Caradocian (6)
-
Hirnantian (1)
-
Katian (1)
-
Sandbian (1)
-
-
-
Road River Formation (2)
-
Silurian
-
Lower Silurian
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Llandovery (2)
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Wenlock (2)
-
-
-
-
Phanerozoic (1)
-
Precambrian
-
upper Precambrian
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Proterozoic
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Neoproterozoic (1)
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-
-
-
-
igneous rocks
-
igneous rocks
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plutonic rocks
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diorites
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trondhjemite (1)
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gabbros (2)
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granites
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monzogranite (1)
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ultramafics
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peridotites
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dunite (1)
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pyroxenite (1)
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porphyry (1)
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volcanic rocks
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basalts
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mid-ocean ridge basalts (1)
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ocean-island basalts (2)
-
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pyroclastics
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ignimbrite (1)
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tuff (1)
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welded tuff (1)
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rhyolites (1)
-
-
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ophiolite (2)
-
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metamorphic rocks
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K-bentonite (1)
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metamorphic rocks
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metaigneous rocks
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metabasalt (1)
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-
metasedimentary rocks
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metachert (1)
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metagraywacke (1)
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metasandstone (1)
-
-
metavolcanic rocks (3)
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schists
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blueschist (1)
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-
slates (1)
-
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ophiolite (2)
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turbidite (5)
-
-
minerals
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carbonates
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dolomite (1)
-
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K-bentonite (1)
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minerals (1)
-
silicates
-
chain silicates
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amphibole group
-
clinoamphibole
-
actinolite (1)
-
glaucophane (1)
-
-
-
-
framework silicates
-
silica minerals
-
quartz (1)
-
-
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (6)
-
-
-
-
sheet silicates
-
chlorite group
-
chlorite (1)
-
-
mica group
-
muscovite (1)
-
phengite (1)
-
-
-
-
sulfides
-
stibnite (1)
-
-
-
Primary terms
-
absolute age (14)
-
Africa
-
North Africa
-
Atlas Mountains
-
Moroccan Atlas Mountains
-
Anti-Atlas (3)
-
-
-
Morocco
-
Moroccan Atlas Mountains
-
Anti-Atlas (3)
-
-
-
-
-
Arctic region
-
Russian Arctic
-
New Siberian Islands (1)
-
-
-
Asia
-
Altai Mountains
-
Gorny Altai (2)
-
-
Altai Russian Federation
-
Gorny Altai (2)
-
-
Altai-Sayan region (2)
-
Far East
-
China
-
Hubei China
-
Yichang China (2)
-
-
Hunan China (1)
-
Kunlun Mountains (1)
-
South China Block (1)
-
Xinjiang China
-
Tarim Basin (1)
-
-
Yangtze Platform (1)
-
Yangtze Three Gorges (2)
-
-
Korea
-
South Korea (1)
-
-
Vietnam (1)
-
-
Kopet-Dag Range (1)
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Taymyr Peninsula (1)
-
-
-
Middle East
-
Iran
-
Elburz (1)
-
-
Turkey (1)
-
-
Siberia (1)
-
Tibetan Plateau (1)
-
Tien Shan (1)
-
Yakutia Russian Federation
-
New Siberian Islands (1)
-
-
-
Australasia
-
Australia (1)
-
New Zealand (1)
-
-
biogeography (16)
-
Canada
-
Arctic Archipelago (1)
-
Cassiar Mountains (1)
-
Eastern Canada
-
Maritime Provinces
-
New Brunswick
-
Saint John County New Brunswick
-
Saint John New Brunswick (1)
-
-
-
Nova Scotia
-
Cape Breton Island (3)
-
Cobequid Fault (1)
-
Yarmouth County Nova Scotia
-
Yarmouth Nova Scotia (1)
-
-
-
-
Meguma Terrane (7)
-
Newfoundland and Labrador
-
Newfoundland
-
Great Northern Peninsula (4)
-
Humber Arm Allochthon (1)
-
Port au Port Peninsula (4)
-
-
-
Ontario
-
Ottawa Ontario (2)
-
-
Quebec
-
Anticosti Island (1)
-
Matane County Quebec (1)
-
-
-
Nunavut
-
Devon Island (1)
-
-
Queen Elizabeth Islands
-
Devon Island (1)
-
-
Western Canada
-
Alberta
-
Jasper National Park (2)
-
-
British Columbia (2)
-
Canadian Cordillera (1)
-
Canadian Rocky Mountains (1)
-
Northwest Territories (2)
-
Selwyn Basin (1)
-
Yukon Territory (6)
-
-
-
carbon
-
C-13/C-12 (9)
-
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia (1)
-
-
-
-
clay mineralogy (1)
-
continental drift (4)
-
continental slope (1)
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crust (3)
-
crystal chemistry (1)
-
crystal structure (1)
-
data processing (2)
-
deformation (4)
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diagenesis (4)
-
Europe
-
Baltic region
-
Estonia
-
Saaremaa (1)
-
-
Latvia (1)
-
-
Central Europe
-
Czech Republic
-
Bohemia (1)
-
-
-
Pechora Basin (1)
-
Rhenish Schiefergebirge (1)
-
Southern Europe
-
Iberian Peninsula
-
Spain (1)
-
-
-
Stavelot-Venn Massif (2)
-
Tornquist-Teisseyre Zone (1)
-
Western Europe
-
Ardennes (1)
-
Belgium
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Wallonia Belgium
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Liege Belgium (1)
-
-
-
France
-
Armorican Massif (1)
-
Central Massif
-
Montagne Noire (2)
-
-
Finistere France
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Crozon Peninsula (1)
-
-
Tarn France (1)
-
-
Ireland
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Galway Ireland (1)
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Mayo Ireland (1)
-
-
Scandinavia
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Sweden
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Kalmar Sweden
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Oland (1)
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Skane Sweden (1)
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-
-
United Kingdom
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Great Britain
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Bristol Channel (1)
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England
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Cumbria England (1)
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Gloucestershire England (2)
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Pennines (1)
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Shropshire England (6)
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Warwickshire England (1)
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Welsh Borderland (1)
-
-
Scotland
-
Ayrshire Scotland
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Girvan Scotland (1)
-
-
Highland region Scotland (1)
-
-
Wales
-
Carmarthenshire Wales (1)
-
Gwynedd Wales
-
Arenig (3)
-
Harlech Dome (1)
-
-
Merionethshire Wales
-
Arenig (3)
-
-
South Wales (2)
-
Welsh Basin (4)
-
-
-
-
-
-
faults (6)
-
folds (3)
-
foliation (2)
-
fractures (1)
-
geochemistry (7)
-
geochronology (4)
-
geophysical methods (1)
-
geosynclines (1)
-
Graptolithina
-
Dendroidea (3)
-
Graptoloidea (5)
-
-
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Tremadocian
Ultrastructural evidence shows adaptation to a pelagic lifestyle in Ordovician caryocaridids (Crustacea: phyllocarida) Available to Purchase
Crinoid calyx origin from stem radial echinoderms Open Access
Early Ordovician seamounts preserved in the Canadian Cordillera: Implications for the rift history of western Laurentia Open Access
Ordovician biostratigraphy: index fossils, biozones and correlation Open Access
Abstract Two remarkable events in the history of life on the Earth occur during the Ordovician Period (486.9–443.1 Ma). The first is an exceptionally rapid and sustained radiation of marine life known as the ‘Great Ordovician Biodiversification Event’ (GOBE), and the second is a catastrophic Late Ordovician mass extinction (LOME). Understanding the duration, rate and magnitude of these events requires an increasingly precise global correlation framework. In this chapter we review the major subdivisions of the Ordovician System, their Global Stratotype Section and Points, and the chronostratigraphic levels that define their bases. We also present a detailed set of correlation charts that illustrate the relationships between most of the regional graptolite, conodont and chitinozoan successions across the world.