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NARROW
Format
Article Type
Journal
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Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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South Africa
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Gauteng South Africa (1)
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Altiplano (1)
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Asia
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Far East
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China
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Inner Mongolia China (1)
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Canada
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Western Canada
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British Columbia
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Fraser River delta (1)
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Caribbean region
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West Indies
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Antilles
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Hispaniola
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Central America
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Guatemala (1)
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Colorado River basin (1)
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Europe
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Germany
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Southern Europe
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Iberian Peninsula
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Portugal
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Spain
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Castilla-La Mancha Spain
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Extremadura Spain
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Spanish Central System (1)
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Mexico
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Baja California (2)
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Vizcaino Peninsula (1)
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Chiapas Mexico (1)
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Colorado River delta (1)
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Durango Mexico (1)
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Queretaro Mexico (1)
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Sierra Madre Occidental (1)
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Sinaloa Mexico (1)
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Sonora Mexico (2)
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Trans-Mexican volcanic belt (1)
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North America
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Basin and Range Province (1)
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Sonoran Desert (1)
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Pacific Ocean
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East Pacific
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Northeast Pacific
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Gulf of California (3)
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North Pacific
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Gulf of California (3)
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Sierra de San Luis (1)
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South America
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Andes
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Central Andes (2)
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Argentina
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Brazil
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Chile
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Colombia (1)
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commodities
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metal ores
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beryllium ores (1)
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lithium ores (4)
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niobium ores (1)
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rare earth deposits (1)
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tin ores (2)
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tungsten ores (2)
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mineral deposits, genesis (5)
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mineral exploration (3)
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petroleum (1)
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elements, isotopes
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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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isotope ratios (4)
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isotopes
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radioactive isotopes
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C-14 (2)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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stable isotopes
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C-13/C-12 (1)
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Hf-177/Hf-176 (1)
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Nd-144/Nd-143 (2)
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O-18/O-16 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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Sr-87/Sr-86 (3)
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metals
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actinides
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uranium (1)
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alkali metals
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lithium (4)
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (3)
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aluminum (1)
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gallium (1)
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hafnium
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Hf-177/Hf-176 (1)
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iron (2)
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lead
-
Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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manganese (1)
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niobium (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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-
scandium (1)
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-
-
oxygen
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O-18/O-16 (1)
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-
-
fossils
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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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Primates
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simians
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Cercopithecidae (1)
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Proboscidea
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Elephantoidea
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Elephantidae
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Mammuthus
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Mammuthus columbi (1)
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Rodentia (1)
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ichnofossils
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Cruziana (1)
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Rusophycus (1)
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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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Trilobitomorpha
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Trilobita (2)
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Brachiopoda (1)
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Bryozoa (1)
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Echinodermata
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Crinozoa
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Crinoidea (2)
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Mollusca
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Bivalvia (1)
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Cephalopoda
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Ammonoidea (1)
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Gastropoda (1)
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Protista
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Foraminifera
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Fusulinina
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Fusulinidae (1)
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microfossils
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Conodonta (1)
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Fusulinina
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Fusulinidae (1)
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Plantae
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Spermatophyta
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Angiospermae (1)
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problematic fossils (1)
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geochronology methods
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paleomagnetism (1)
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tephrochronology (1)
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U/Pb (5)
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geologic age
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Cenozoic
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Quaternary
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upper Holocene (2)
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Pleistocene (3)
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upper Quaternary (1)
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Tertiary
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lower Tertiary (1)
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Neogene
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Miocene
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lower Miocene (1)
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upper Miocene (5)
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Pliocene
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lower Pliocene (2)
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Paleogene
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Eocene (1)
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Oligocene
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upper Oligocene (1)
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-
-
-
-
Mesozoic
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Cretaceous
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Lower Cretaceous
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Agrio Formation (1)
-
-
Upper Cretaceous (3)
-
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Jurassic
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Middle Jurassic (1)
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Upper Jurassic
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Portlandian (1)
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Tithonian (1)
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-
-
Triassic
-
Lower Triassic (1)
-
-
Vaca Muerta Formation (3)
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Paleozoic
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Cambrian
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Lower Cambrian (2)
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Carboniferous
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Upper Carboniferous (1)
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Permian (3)
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Precambrian
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Archean (1)
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upper Precambrian
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Proterozoic
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Neoproterozoic
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Ediacaran (1)
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igneous rocks
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igneous rocks
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plutonic rocks
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granites
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aplite (3)
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leucogranite (2)
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pegmatite (9)
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volcanic rocks
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andesites (1)
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basalts
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tholeiitic basalt (1)
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pyroclastics
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ignimbrite (2)
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tuff (1)
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metamorphic rocks
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metamorphic rocks
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metasedimentary rocks (3)
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metasomatic rocks
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greisen (1)
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migmatites (1)
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turbidite (1)
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minerals
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carbonates
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calcite (2)
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halides
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fluorides
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triplite (1)
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oxides
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niobates
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spinel (1)
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spinel group (1)
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phosphates
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amblygonite (2)
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apatite (1)
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beraunite (1)
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fluorapatite (1)
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goyazite (2)
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hydroxylapatite (1)
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lithiophilite (3)
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montebrasite (4)
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torbernite (1)
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triphylite (2)
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triplite (1)
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vivianite (2)
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wavellite (1)
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silicates
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chain silicates
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pyroxene group
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clinopyroxene
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spodumene (1)
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framework silicates
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feldspar group
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plagioclase
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albite (2)
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silica minerals
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quartz (2)
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orthosilicates
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nesosilicates
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garnet group
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almandine (1)
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zircon group
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zircon (2)
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-
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ring silicates
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beryl (1)
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tourmaline group (2)
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sheet silicates
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clay minerals (1)
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mica group
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lepidolite (2)
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petalite (2)
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sulfates (1)
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sulfides (1)
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uranium minerals (1)
-
-
Primary terms
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absolute age (8)
-
Africa
-
Southern Africa
-
South Africa
-
Gauteng South Africa (1)
-
-
-
-
Asia
-
Far East
-
China
-
Inner Mongolia China (1)
-
-
-
-
atmosphere (1)
-
biogeography (3)
-
Canada
-
Western Canada
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British Columbia
-
Fraser River delta (1)
-
-
-
-
carbon
-
C-13/C-12 (1)
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C-14 (2)
-
-
Caribbean region
-
West Indies
-
Antilles
-
Greater Antilles
-
Hispaniola
-
Dominican Republic (1)
-
-
-
-
-
-
Cenozoic
-
Quaternary
-
Holocene
-
upper Holocene (2)
-
-
Pleistocene (3)
-
upper Quaternary (1)
-
-
Tertiary
-
lower Tertiary (1)
-
Neogene
-
Miocene
-
lower Miocene (1)
-
upper Miocene (5)
-
-
Pliocene
-
lower Pliocene (2)
-
-
-
Paleogene
-
Eocene (1)
-
Oligocene
-
upper Oligocene (1)
-
-
-
-
-
Central America
-
Guatemala (1)
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Primates
-
simians
-
Cercopithecidae (1)
-
-
-
Proboscidea
-
Elephantoidea
-
Elephantidae
-
Mammuthus
-
Mammuthus columbi (1)
-
-
-
-
-
Rodentia (1)
-
-
-
-
-
-
-
conservation (1)
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crust (4)
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crystal chemistry (6)
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crystal structure (2)
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deformation (3)
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diagenesis (1)
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earthquakes (3)
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ecology (1)
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Europe
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Central Europe
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Germany
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Bavaria Germany (1)
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-
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Southern Europe
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Iberian Peninsula
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Central Iberian Zone (4)
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Iberian Massif (3)
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Ossa-Morena Zone (1)
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Portugal
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Tras-os-Montes (1)
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Spain
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Castilla y Leon Spain
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Salamanca Spain (3)
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Castilla-La Mancha Spain
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Toledo Spain (1)
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Extremadura Spain
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Badajoz Spain (1)
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Galicia Spain (1)
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Spanish Central System (1)
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faults (7)
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folds (1)
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fractures (1)
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geochemistry (6)
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geomorphology (1)
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geophysical methods (2)
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ichnofossils
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Cruziana (1)
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Rusophycus (1)
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-
igneous rocks
-
plutonic rocks
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granites
-
aplite (3)
-
leucogranite (2)
-
-
pegmatite (9)
-
-
volcanic rocks
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andesites (1)
-
basalts
-
tholeiitic basalt (1)
-
-
pyroclastics
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ignimbrite (2)
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tuff (1)
-
-
-
-
inclusions
-
fluid inclusions (1)
-
-
intrusions (3)
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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)
-
-
-
Trilobitomorpha
-
Trilobita (2)
-
-
-
Brachiopoda (1)
-
Bryozoa (1)
-
Echinodermata
-
Crinozoa
-
Crinoidea (2)
-
-
-
Mollusca
-
Bivalvia (1)
-
Cephalopoda
-
Ammonoidea (1)
-
-
Gastropoda (1)
-
-
Protista
-
Foraminifera
-
Fusulinina
-
Fusulinidae (1)
-
-
-
-
-
isotopes
-
radioactive isotopes
-
C-14 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (1)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
Sr-87/Sr-86 (3)
-
-
-
lava (2)
-
magmas (3)
-
mantle (2)
-
maps (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Agrio Formation (1)
-
-
Upper Cretaceous (3)
-
-
Jurassic
-
Middle Jurassic (1)
-
Upper Jurassic
-
Portlandian (1)
-
Tithonian (1)
-
-
-
Triassic
-
Lower Triassic (1)
-
-
Vaca Muerta Formation (3)
-
-
metal ores
-
beryllium ores (1)
-
gold ores (1)
-
lithium ores (4)
-
niobium ores (1)
-
rare earth deposits (1)
-
silver ores (1)
-
tantalum ores (1)
-
tin ores (2)
-
tungsten ores (2)
-
-
metals
-
actinides
-
uranium (1)
-
-
alkali metals
-
lithium (4)
-
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
aluminum (1)
-
gallium (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
iron (2)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
manganese (1)
-
niobium (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (2)
-
-
scandium (1)
-
-
-
metamorphic rocks
-
metasedimentary rocks (3)
-
metasomatic rocks
-
greisen (1)
-
-
migmatites (1)
-
-
metamorphism (2)
-
metasomatism (2)
-
Mexico
-
Baja California (2)
-
Baja California Mexico (2)
-
Baja California Sur Mexico
-
Vizcaino Peninsula (1)
-
-
Chiapas Mexico (1)
-
Colorado River delta (1)
-
Durango Mexico (1)
-
Queretaro Mexico (1)
-
San Luis Potosi Mexico (1)
-
Sierra Madre Occidental (1)
-
Sinaloa Mexico (1)
-
Sonora Mexico (2)
-
Trans-Mexican volcanic belt (1)
-
-
mineral deposits, genesis (5)
-
mineral exploration (3)
-
North America
-
Basin and Range Province (1)
-
Sonoran Desert (1)
-
-
orogeny (3)
-
oxygen
-
O-18/O-16 (1)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (3)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (3)
-
-
-
-
paleoclimatology (2)
-
paleoecology (3)
-
paleomagnetism (1)
-
Paleozoic
-
Cambrian
-
Lower Cambrian (2)
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-
Carboniferous
-
Upper Carboniferous (1)
-
-
Permian (3)
-
-
paragenesis (3)
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petroleum (1)
-
Plantae
-
Spermatophyta
-
Angiospermae (1)
-
-
-
plate tectonics (5)
-
Precambrian
-
Archean (1)
-
upper Precambrian
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Proterozoic
-
Neoproterozoic
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Ediacaran (1)
-
-
-
-
-
problematic fossils (1)
-
remote sensing (1)
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sea-level changes (1)
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sedimentary rocks
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carbonate rocks
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limestone (2)
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chemically precipitated rocks
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chert (1)
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clastic rocks
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arenite
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quartz arenite (1)
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argillite (1)
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conglomerate (1)
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mudstone (3)
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sandstone (1)
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sedimentary structures
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planar bedding structures
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bedding (1)
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cross-bedding (1)
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laminations (1)
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soft sediment deformation (1)
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sedimentation (3)
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sediments
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clastic sediments
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sand (1)
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South America
-
Andes
-
Central Andes (2)
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Northern Andes (1)
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Southern Andes (2)
-
-
Argentina
-
Mendoza Argentina (1)
-
Neuquen Argentina (1)
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Neuquen Basin (5)
-
Pampean Mountains (1)
-
San Juan Argentina (1)
-
San Luis Argentina (2)
-
-
Brazil
-
Mato Grosso do Sul Brazil (1)
-
Minas Gerais Brazil (1)
-
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Chile
-
Atacama Desert (1)
-
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Colombia (1)
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Ecuador (1)
-
-
stratigraphy (1)
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structural analysis (1)
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tectonics
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neotectonics (1)
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United States
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Arizona
-
San Carlos Indian Reservation (1)
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-
California (1)
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Maine
-
Sebago Batholith (1)
-
-
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks
-
limestone (2)
-
-
chemically precipitated rocks
-
chert (1)
-
-
clastic rocks
-
arenite
-
quartz arenite (1)
-
-
argillite (1)
-
conglomerate (1)
-
mudstone (3)
-
sandstone (1)
-
-
-
turbidite (1)
-
-
sedimentary structures
-
boudinage (1)
-
sedimentary structures
-
planar bedding structures
-
bedding (1)
-
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Arroyo Zamora Formation
Permian and Lower Triassic stratigraphy along the 30th parallel eastern Baja California Norte, Mexico Available to Purchase
Prebatholithic metasedimentary rocks east of El Marmol on the 30th parallel of Baja California include tightly folded Permian and Lower Triassic rocks metamorphosed to upper greenschist/amphibolite facies. These rocks are divided into one informal and three formal formations. The rocks of El Marmol (informal formation) have a minimum thickness of 2,000 m and consists of thin-bedded argillite, sandstone, and chert with sparsely fossiliferous carbonate rock interstratified with more thickly bedded lenses of calcareous quartzarenite, impure carbonate rock, and chert-quartzite-carbonate clast conglomerate. The rocks appear to have been variously deposited by sediment gravity flows and intervening quiet-water deposition in a hemipelagic setting. The rocks of El Marmol contains no datable fossil material but are Lower Permian or older. The Arroyo Zamora Formation has an estimated thickness of 500 m, conformably overlies the rocks of El Marmol, and is composed primarily of massive or crudely laminated silty metaargillite that locally exhibits fine-grained turbidite successions and pebbly mudstone. Slumps, boudined sheets, and channelized sediment, gravity-flow deposits composed of coarser carbonate and quartzose clasts, including carbonate blocks up to several meters, are scattered throughout. Fossils in both the matrix and clasts of these coarse-grained deposits include Lower Permian (Leonardian) fusulinids, bryozoa, brachiopods, and crinoid columnals. The Cerro El Volcan Formation has an estimated thickness of 1,400 m and is divided into three members. The lowermost member (A) consists of 1,000 m of rhythmically bedded, dark siliceous argillite that contains intervals of metamorphosed massive calcareous sandstone, sandy limestone, and thinly bedded carbonate rock with siliceous partings. The overlying member (B) consists of 50 m of metamorphosed conglomerate, pebbly quartzite, and calcareous sandstone. Angular blocks throughout this member commonly contain bioclastic debris. The uppermost member (C) consists of 350 m of laminated argillite containing widely spaced interbeds of metamorphosed argillaceous carbonate rock. It is considered Late Permian in age because it lies conformably on rocks of Early Permian age, and is overlain with possible disconformity by the Lower Triassic De Indio Formation. The De Indio Formation has an estimated thickness of 300 m and is divided into two members. The lower member (A) contains up to 50 m of metamorphosed chert-pebble conglomerate, quartzite, cross-bedded calcareous sandstone, and limestone. The upper member (B) consists of 250 m of carbonaceous, staurolite-bearing argillite. Ammonoids and conodonts from member A are of Early Triassic (Smithian) age. These four formations have lithologies and faunal assemblages similar to coeval rocks deposited along the outer edge of the Cordilleran miogeocline of western North America, and were probably deposited in a southern extension of this miogeocline.
Permian crinoid columnals from the Zamora Formation near El Volcan, Baja California Norte, Mexico Available to Purchase
Disarticulated Permian crinoid columnals and pluricolumnals, up to 9 cm in diameter, from exotic carbonate blocks in the base of the Zamora Formation, found along Arroyo Zamora near El Volcan, Baja California, Norte, are among the largest ever reported. The relatively inflexible columns that these columnals and pluricolumnals formed are interpreted to have lived in relatively strong currents along the edge of the shelf or upper slope. They are designated Apletoanteris bajaensis n. gen. and n. sp.