Update search
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Southern Africa
-
Namibia (1)
-
-
-
Altiplano (3)
-
Asia
-
Indian Peninsula
-
India (1)
-
Jammu and Kashmir
-
Ladakh (1)
-
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
Middle East
-
Turkey (1)
-
-
-
Atlantic Ocean
-
Mid-Atlantic Ridge (1)
-
-
Australasia
-
Australia
-
Western Australia (1)
-
-
-
Canada
-
Eastern Canada
-
Ontario
-
Sudbury igneous complex (1)
-
-
-
-
Central America (1)
-
Cerro Prieto (1)
-
Commonwealth of Independent States
-
Russian Federation
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
-
-
Europe
-
Alps
-
Swiss Alps (1)
-
-
Central Europe
-
Germany
-
Baden-Wurttemberg Germany
-
Katzenbuckel (1)
-
-
Eifel (4)
-
Hesse Germany
-
Wetterau (1)
-
-
Rhineland-Palatinate Germany
-
Laacher See (4)
-
-
-
Switzerland
-
Swiss Alps (1)
-
-
Upper Rhine Graben (1)
-
-
Rhenish Schiefergebirge
-
Eifel (4)
-
-
Southern Europe
-
Italy
-
Campania Italy
-
Monte Somma (1)
-
Naples Italy (1)
-
Phlegraean Fields (1)
-
Vesuvius (1)
-
-
-
-
Western Europe
-
Iceland (1)
-
United Kingdom
-
Great Britain
-
England (1)
-
Scotland
-
Scottish Highlands (1)
-
-
Wales
-
Welsh Basin (1)
-
-
-
-
-
-
Jack Hills (1)
-
Mexico
-
Baja California Mexico (1)
-
-
North America
-
Appalachians
-
Blue Ridge Province (1)
-
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
-
-
-
Puna (4)
-
San Andreas Fault (1)
-
South America
-
Andes
-
Central Andes (5)
-
-
Argentina
-
La Rioja Argentina (1)
-
Pampean Mountains (2)
-
-
Bolivia (3)
-
-
United States
-
California
-
Salton Trough (2)
-
San Gabriel Mountains (1)
-
Southern California (3)
-
-
Idaho
-
Bonneville County Idaho (1)
-
Madison County Idaho (1)
-
Snake River plain (2)
-
-
North Carolina (1)
-
Tennessee (1)
-
-
Yucatan Peninsula (1)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (1)
-
C-14 (1)
-
-
isotope ratios (10)
-
isotopes
-
radioactive isotopes
-
C-14 (1)
-
Pa-231 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
U-235 (2)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Hf-177/Hf-176 (2)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (8)
-
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
-
protactinium
-
Pa-231 (2)
-
-
thorium (2)
-
uranium
-
U-235 (2)
-
-
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
hafnium
-
Hf-177/Hf-176 (2)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
niobium (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
-
titanium (1)
-
zirconium (2)
-
-
oxygen
-
O-18/O-16 (8)
-
-
sulfur
-
S-34/S-32 (1)
-
-
-
fossils
-
ichnofossils (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda (1)
-
-
-
-
Mollusca
-
Bivalvia (1)
-
Gastropoda (1)
-
-
Protista
-
Foraminifera (1)
-
-
-
microfossils (1)
-
-
geochronology methods
-
(U-Th)/He (2)
-
Ar/Ar (3)
-
radiation damage (1)
-
Th/U (9)
-
thermochronology (2)
-
U/Pb (20)
-
U/Th/Pb (2)
-
uranium disequilibrium (4)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene
-
upper Holocene (2)
-
-
Pleistocene
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Allerod (1)
-
-
-
-
-
upper Quaternary (2)
-
-
Tertiary
-
Neogene
-
Miocene
-
upper Miocene
-
Punchbowl Formation (1)
-
-
-
Pliocene (2)
-
-
Paleogene
-
Oligocene (1)
-
-
-
upper Cenozoic (1)
-
-
Dalradian (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Maestrichtian (1)
-
Senonian (1)
-
-
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
-
-
-
Paleozoic
-
Devonian (1)
-
lower Paleozoic (1)
-
Ordovician (2)
-
Permian
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
Silurian
-
Upper Silurian
-
Ludlow (1)
-
Pridoli (1)
-
-
-
upper Paleozoic (1)
-
-
Precambrian
-
Archean (1)
-
Hadean (1)
-
upper Precambrian
-
Proterozoic (1)
-
-
-
-
igneous rocks
-
igneous rocks
-
carbonatites (1)
-
granophyre (2)
-
hypabyssal rocks (1)
-
plutonic rocks
-
granites (1)
-
pegmatite (1)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
peridotites
-
harzburgite (1)
-
-
-
-
volcanic rocks
-
basalts
-
flood basalts (1)
-
-
basanite (1)
-
glasses
-
obsidian (1)
-
volcanic glass (1)
-
-
phonolites (4)
-
pyroclastics
-
ignimbrite (4)
-
tuff (1)
-
-
rhyolites (2)
-
trachytes (1)
-
-
-
ophiolite (2)
-
volcanic ash (2)
-
-
metamorphic rocks
-
metamorphic rocks (3)
-
ophiolite (2)
-
-
minerals
-
oxides
-
baddeleyite (2)
-
niobates
-
pyrochlore (1)
-
-
perovskite (1)
-
rutile (2)
-
-
phosphates
-
monazite (2)
-
-
silicates
-
chain silicates
-
amphibole group
-
clinoamphibole
-
hornblende (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (1)
-
sanidine (1)
-
-
-
silica minerals
-
quartz (1)
-
-
-
orthosilicates
-
nesosilicates
-
sillimanite (1)
-
titanite group
-
titanite (1)
-
-
zircon group
-
zircon (19)
-
-
-
-
sheet silicates
-
mica group
-
phengite (1)
-
-
-
-
sulfates
-
anhydrite (1)
-
-
sulfides (1)
-
-
Primary terms
-
absolute age (25)
-
Africa
-
Southern Africa
-
Namibia (1)
-
-
-
Asia
-
Indian Peninsula
-
India (1)
-
Jammu and Kashmir
-
Ladakh (1)
-
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
Middle East
-
Turkey (1)
-
-
-
Atlantic Ocean
-
Mid-Atlantic Ridge (1)
-
-
Australasia
-
Australia
-
Western Australia (1)
-
-
-
Canada
-
Eastern Canada
-
Ontario
-
Sudbury igneous complex (1)
-
-
-
-
carbon
-
C-13/C-12 (1)
-
C-14 (1)
-
-
Cenozoic
-
Quaternary
-
Holocene
-
upper Holocene (2)
-
-
Pleistocene
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Allerod (1)
-
-
-
-
-
upper Quaternary (2)
-
-
Tertiary
-
Neogene
-
Miocene
-
upper Miocene
-
Punchbowl Formation (1)
-
-
-
Pliocene (2)
-
-
Paleogene
-
Oligocene (1)
-
-
-
upper Cenozoic (1)
-
-
Central America (1)
-
climate change (1)
-
crust (2)
-
crystal growth (1)
-
deformation (1)
-
Europe
-
Alps
-
Swiss Alps (1)
-
-
Central Europe
-
Germany
-
Baden-Wurttemberg Germany
-
Katzenbuckel (1)
-
-
Eifel (4)
-
Hesse Germany
-
Wetterau (1)
-
-
Rhineland-Palatinate Germany
-
Laacher See (4)
-
-
-
Switzerland
-
Swiss Alps (1)
-
-
Upper Rhine Graben (1)
-
-
Rhenish Schiefergebirge
-
Eifel (4)
-
-
Southern Europe
-
Italy
-
Campania Italy
-
Monte Somma (1)
-
Naples Italy (1)
-
Phlegraean Fields (1)
-
Vesuvius (1)
-
-
-
-
Western Europe
-
Iceland (1)
-
United Kingdom
-
Great Britain
-
England (1)
-
Scotland
-
Scottish Highlands (1)
-
-
Wales
-
Welsh Basin (1)
-
-
-
-
-
-
faults (2)
-
geochemistry (7)
-
geochronology (1)
-
ichnofossils (1)
-
igneous rocks
-
carbonatites (1)
-
granophyre (2)
-
hypabyssal rocks (1)
-
plutonic rocks
-
granites (1)
-
pegmatite (1)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
peridotites
-
harzburgite (1)
-
-
-
-
volcanic rocks
-
basalts
-
flood basalts (1)
-
-
basanite (1)
-
glasses
-
obsidian (1)
-
volcanic glass (1)
-
-
phonolites (4)
-
pyroclastics
-
ignimbrite (4)
-
tuff (1)
-
-
rhyolites (2)
-
trachytes (1)
-
-
-
inclusions (4)
-
intrusions (7)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda (1)
-
-
-
-
Mollusca
-
Bivalvia (1)
-
Gastropoda (1)
-
-
Protista
-
Foraminifera (1)
-
-
-
isotopes
-
radioactive isotopes
-
C-14 (1)
-
Pa-231 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
U-235 (2)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Hf-177/Hf-176 (2)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (8)
-
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)
-
-
-
lava (3)
-
magmas (10)
-
mantle (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Maestrichtian (1)
-
Senonian (1)
-
-
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
-
-
-
metals
-
actinides
-
protactinium
-
Pa-231 (2)
-
-
thorium (2)
-
uranium
-
U-235 (2)
-
-
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
hafnium
-
Hf-177/Hf-176 (2)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
niobium (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
-
titanium (1)
-
zirconium (2)
-
-
metamorphic rocks (3)
-
metamorphism (2)
-
metasomatism (4)
-
Mexico
-
Baja California Mexico (1)
-
-
North America
-
Appalachians
-
Blue Ridge Province (1)
-
-
-
oxygen
-
O-18/O-16 (8)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
-
-
-
paleoclimatology (1)
-
paleoecology (2)
-
paleogeography (2)
-
Paleozoic
-
Devonian (1)
-
lower Paleozoic (1)
-
Ordovician (2)
-
Permian
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
Silurian
-
Upper Silurian
-
Ludlow (1)
-
Pridoli (1)
-
-
-
upper Paleozoic (1)
-
-
paragenesis (1)
-
plate tectonics (2)
-
Precambrian
-
Archean (1)
-
Hadean (1)
-
upper Precambrian
-
Proterozoic (1)
-
-
-
sedimentary rocks
-
bone beds (1)
-
carbonate rocks (1)
-
chemically precipitated rocks
-
evaporites (1)
-
-
clastic rocks
-
sandstone (1)
-
-
-
sedimentation (1)
-
sediments (2)
-
South America
-
Andes
-
Central Andes (5)
-
-
Argentina
-
La Rioja Argentina (1)
-
Pampean Mountains (2)
-
-
Bolivia (3)
-
-
spectroscopy (2)
-
structural analysis (1)
-
sulfur
-
S-34/S-32 (1)
-
-
tectonics (5)
-
United States
-
California
-
Salton Trough (2)
-
San Gabriel Mountains (1)
-
Southern California (3)
-
-
Idaho
-
Bonneville County Idaho (1)
-
Madison County Idaho (1)
-
Snake River plain (2)
-
-
North Carolina (1)
-
Tennessee (1)
-
-
waste disposal (1)
-
weathering (1)
-
-
rock formations
-
Famatina System (1)
-
Siberian Traps (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
bone beds (1)
-
carbonate rocks (1)
-
chemically precipitated rocks
-
evaporites (1)
-
-
clastic rocks
-
sandstone (1)
-
-
-
-
sediments
-
sediments (2)
-
GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
The Rosario segment of the Cretaceous Alisitos arc (Baja California, Mexico) is arguably the best-exposed structurally intact and unmetamorphosed oceanic arc crustal section on Earth. The gently tilted, 50-km-long section exposes the transition from upper-crustal volcanic rocks to mid-crustal plutonic rocks, formed in an extensional environment. This book presents a detailed geologic map, based on an exhaustive data set including geochemistry, geochronology, and annotated outcrop photos and photomicrographs. Subsegments within the Rosario segment include a subaerial edifice, a volcano-bounded basin, and a fault-bounded basin, each underpinned by separate plutons. The entire data set is integrated across these subsegments in a time slice reconstruction of arc evolution and the relationships between plutonism and volcanism. The data set provides constraints on the evolution of silicic calderas and tectonic triggers for caldera collapse, caldera resurgence by emplacement of sill complexes and by incremental growth of plutons, and comparison with velocity profiles in modern arcs.
Geology of a Large Intact Extensional Oceanic Arc Crustal Section with Superior Exposures: Cretaceous Alisitos Arc, Baja California (Mexico) Available to Purchase
ABSTRACT The Rosario segment of the Early Cretaceous Alisitos oceanic arc exposes the transition from upper-crustal volcanic and hypabyssal rocks to middle-crustal plutons, which formed in an extensional environment. The Rosario segment forms a structurally intact, unmetamorphosed, spectacularly well-exposed, gently tilted section that is 50 km long and 7 km deep. The top of the exposed section is unconformably overlain by flat-lying Late Cretaceous sedimentary rocks (Rosario Group, described elsewhere), and the base of the section passes downward into ductilely deformed metamorphic rocks (not mapped herein). We divided the Rosario segment into three subsegments: a central subaerial edifice, underpinned by the La Burra pluton; a southern volcano-bounded basin (dominantly shallow marine), underpinned by the San Fernando pluton; and a northern fault-bounded basin (dominantly deep marine), underpinned by the Los Martires pluton. Using a combination of published and new geochronologic data, we infer that the time span represented by the arc crustal section could be as little as 1.7 m.y., dated at ca. 111–110 Ma. Volcanic and plutonic samples show a continuum from basalt/basaltic andesite to rhyolite, are low to medium K, and are transitional tholeiite to calc-alkaline in character. Hf isotopic data from zircons indicate primitive magma, consistent with previously published whole-rock isotopic data. The volcanic stratigraphy can be correlated across all three subsegments using the tuff of Aguajito (Ki-A) , a distinctive rhyolite welded ignimbrite that fills the 15-km-wide, >3.6-km-deep La Burra caldera on the central subaerial edifice. Additionally, a second caldera is preserved below the tuff of Aguajito (Ki-A) in the northern fault-bounded basin, floored by a large rhyolite sill complex, up to 700 m thick with a lateral extent of >7 km. Up section from the tuff of Aguajito (Ki-A) , there is an abrupt shift to dominantly mafic volcanism that we correlated across all three subsegments of the Rosario segment, dividing the section into two distinct parts (phase 1 and phase 2). The pluton beneath the central subaerial edifice (La Burra) is associated with the caldera that produced the tuff of Aguajito (Ki-A) during phase 1. Plutons beneath the northern fault-bounded basin (Los Martires) and the southern volcano-bounded basin (San Fernando) were emplaced during phase 2. However, we infer that the La Burra pluton, which is associated with the phase 1 La Burra caldera, continued to grow incrementally during phase 2 because it intruded and tilted both phase 1 and phase 2 strata. The Rosario segment escaped postmagmatic deformation, other than gentle tilting (25°–35°) to the west as a single rigid block. The Rosario segment of the Cretaceous Alisitos arc represents an extensional oceanic arc with abundant silicic pyroclastic rocks, culminating in arc rifting with outpouring of mafic magmas. The excellent exposure and preservation provide us with the opportunity to herein describe the following: (1) caldera collapse features and the products of varying explosive eruptive styles; (2) caldera plumbing systems, including silicic sill complexes; (3) the transition from plutons through hypabyssal intrusions to eruptive products; (4) incremental pluton growth and its effects on the structure of the roof rocks; (5) the products of deep-water mafic to silicic eruptions; and (6) flow transformations that occur when hot pyroclastic flows enter marine basins on gentle slopes versus steep slopes. We also used this data set to address questions highly complementary to the work being done on understanding the growth of continental crust at subduction zones. Finally, this volume serves as a model for detailed geologic study of paleo-arcs.