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NARROW
Format
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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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Central Africa
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Congo Democratic Republic
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Shaba Congo Democratic Republic (1)
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North Africa
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Tunisia (1)
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Southern Africa
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Namibia (1)
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Asia
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Far East
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China
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Anhui China (1)
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Heilongjiang China
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Xiao Hinggan Ling (1)
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Hunan China (1)
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Jiangxi China (1)
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Jilin China (1)
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Tongbai Mountains (1)
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Atlantic Ocean
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North Atlantic
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Australasia
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Canada
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Chama Basin (1)
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Europe
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Romania
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Western Europe
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Mexico
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Western Interior (1)
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United States
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San Juan County New Mexico (2)
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Sandoval County New Mexico (2)
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Western U.S. (2)
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commodities
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thorium ores (2)
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hydrogen
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metals
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alkali metals
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potassium (1)
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alkaline earth metals
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Sr-87/Sr-86 (2)
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copper (1)
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gold (1)
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hafnium
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Hf-177/Hf-176 (1)
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molybdenum (1)
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platinum group
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platinum (1)
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platinum ores (2)
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rare earths
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neodymium
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Nd-144/Nd-143 (1)
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oxygen
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O-18/O-16 (1)
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sulfur
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S-34/S-32 (1)
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fossils
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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
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Podocopida
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Cypridocopina
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Cyprididae (1)
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Brachiopoda (1)
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Protista
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Foraminifera (1)
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microfossils (3)
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geochronology methods
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U/Pb (8)
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geologic age
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Cenozoic
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Quaternary
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Bandelier Tuff (1)
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Tertiary
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Neogene
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Miocene
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lower Miocene (2)
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middle Miocene (1)
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upper Miocene (1)
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Pliocene
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lower Pliocene (1)
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Tesuque Formation (4)
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Paleogene
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Eocene
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lower Eocene (1)
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middle Eocene (1)
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Mirador Formation (1)
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Oligocene (6)
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Paleocene
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Nacimiento Formation (1)
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Sespe Formation (1)
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Wilcox Group (3)
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upper Cenozoic (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Aptian (1)
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Barremian (1)
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Santana Formation (1)
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Upper Cretaceous
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Cenomanian
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upper Cenomanian (1)
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Ojo Alamo Sandstone (1)
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Turonian
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lower Turonian (1)
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Jurassic (5)
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Triassic
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Mole Granite (2)
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Paleozoic
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Carboniferous
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Lower Carboniferous
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Mississippian (1)
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Devonian (2)
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upper Paleozoic (1)
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Precambrian
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Stillwater Complex (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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granite porphyry (1)
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monzogranite (1)
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granodiorites (1)
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pegmatite (1)
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porphyry (1)
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volcanic rocks
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andesites (1)
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basalts (1)
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pyroclastics
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ignimbrite (2)
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tuff (2)
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rhyolites (1)
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metamorphic rocks
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metamorphic rocks
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metasedimentary rocks (1)
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minerals
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phosphates
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silicates
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framework silicates
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feldspar group
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alkali feldspar
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sanidine (1)
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silica minerals
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quartz (3)
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orthosilicates
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nesosilicates
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zircon group
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zircon (7)
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ring silicates
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tourmaline group (1)
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sheet silicates
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clay minerals
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kaolinite (1)
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smectite (1)
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illite (1)
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sulfates
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anhydrite (1)
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sulfides
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pyrite (1)
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sulfosalts
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sulfarsenates
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enargite (1)
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tungstates
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wolframite (1)
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-
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Primary terms
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absolute age (13)
-
Africa
-
Central Africa
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Congo Democratic Republic
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Shaba Congo Democratic Republic (1)
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-
-
North Africa
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Tunisia (1)
-
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Southern Africa
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Namibia (1)
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South Africa
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Bushveld Complex (1)
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West Africa (1)
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Asia
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Far East
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China
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Anhui China (1)
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Dabie Mountains (1)
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Fujian China (1)
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Heilongjiang China
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Xiao Hinggan Ling (1)
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-
Hunan China (1)
-
Jiangxi China (1)
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Jilin China (1)
-
Tongbai Mountains (1)
-
-
-
-
Atlantic Ocean
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North Atlantic
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Gulf of Mexico (2)
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-
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Australasia
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Australia (2)
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bibliography (1)
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boron
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B-11/B-10 (1)
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brines (7)
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Canada
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Eastern Canada
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Maritime Provinces
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New Brunswick (1)
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Nova Scotia
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Cape Breton Island (1)
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-
-
-
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Cenozoic
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Quaternary
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Pleistocene
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Bandelier Tuff (1)
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-
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Tertiary
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Neogene
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Miocene
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lower Miocene (2)
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middle Miocene (1)
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upper Miocene (1)
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Pliocene
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lower Pliocene (1)
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-
Tesuque Formation (4)
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-
Paleogene
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Eocene
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lower Eocene (1)
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middle Eocene (1)
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Mirador Formation (1)
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-
Oligocene (6)
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Paleocene
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Nacimiento Formation (1)
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Sespe Formation (1)
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Wilcox Group (3)
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upper Cenozoic (1)
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clay mineralogy (1)
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crust (4)
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Europe
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Romania
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Western Europe
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Scandinavia
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geomorphology (1)
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geophysical methods (4)
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ground water (3)
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heat flow (4)
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hydrogen
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D/H (1)
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hydrology (1)
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igneous rocks
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plutonic rocks
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granites
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granite porphyry (1)
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monzogranite (1)
-
-
granodiorites (1)
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pegmatite (1)
-
-
porphyry (1)
-
volcanic rocks
-
andesites (1)
-
basalts (1)
-
pyroclastics
-
ignimbrite (2)
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tuff (2)
-
-
rhyolites (1)
-
-
-
inclusions
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fluid inclusions (18)
-
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intrusions (9)
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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
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Podocopida
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Cypridocopina
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Cyprididae (1)
-
-
-
-
-
-
-
Brachiopoda (1)
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Protista
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Foraminifera (1)
-
-
-
isotopes
-
stable isotopes
-
B-11/B-10 (1)
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D/H (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (1)
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O-18/O-16 (1)
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S-34/S-32 (1)
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Sr-87/Sr-86 (2)
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-
-
magmas (14)
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Mediterranean Sea
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Pelagian Sea
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Gulf of Gabes (1)
-
-
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Aptian (1)
-
Barremian (1)
-
-
Santana Formation (1)
-
Upper Cretaceous
-
Cenomanian
-
upper Cenomanian (1)
-
-
Ojo Alamo Sandstone (1)
-
Turonian
-
lower Turonian (1)
-
-
-
-
Jurassic (5)
-
Triassic
-
Mole Granite (2)
-
-
-
metal ores
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copper ores (15)
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gold ores (9)
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lead ores (1)
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lead-zinc deposits (1)
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molybdenum ores (16)
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nickel ores (1)
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niobium ores (1)
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platinum ores (2)
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polymetallic ores (1)
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rare earth deposits (2)
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silver ores (2)
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tantalum ores (1)
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thorium ores (2)
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tin ores (3)
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tungsten ores (4)
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uranium ores (2)
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zinc ores (2)
-
-
metals
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actinides
-
thorium (1)
-
uranium (1)
-
-
alkali metals
-
cesium (1)
-
potassium (1)
-
sodium (1)
-
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
copper (1)
-
gold (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
molybdenum (1)
-
platinum group
-
platinum (1)
-
platinum ores (2)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
metamorphic rocks
-
metasedimentary rocks (1)
-
schists (1)
-
-
metasomatism (5)
-
Mexico
-
Chihuahua Mexico (1)
-
Sierra Madre Occidental (1)
-
Sonora Mexico (1)
-
-
mineral deposits, genesis (21)
-
mineral exploration (1)
-
North America
-
Appalachians (1)
-
Gulf Coastal Plain (2)
-
North American Cordillera (2)
-
Rio Grande Rift (8)
-
Rocky Mountains
-
Southern Rocky Mountains (3)
-
U. S. Rocky Mountains
-
San Juan Mountains (2)
-
Sangre de Cristo Mountains (2)
-
Sawatch Range (1)
-
-
-
Western Interior (1)
-
-
oil and gas fields (2)
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orogeny (2)
-
oxygen
-
O-18/O-16 (1)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (1)
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-
-
-
paleoclimatology (1)
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paleoecology (1)
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paleogeography (9)
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paleomagnetism (2)
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Paleozoic
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Carboniferous
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Lower Carboniferous
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Dinantian (1)
-
-
Mississippian (1)
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Pennsylvanian (1)
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-
Devonian (2)
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upper Paleozoic (1)
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paragenesis (4)
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petroleum
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natural gas (1)
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shale oil (1)
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phase equilibria (4)
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plate tectonics (6)
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Precambrian
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Stillwater Complex (1)
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sedimentary rocks
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carbonate rocks (1)
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clastic rocks
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conglomerate (2)
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eolianite (1)
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fanglomerate (1)
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mudstone (1)
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red beds (1)
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sandstone (5)
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sedimentary structures
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planar bedding structures
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cross-bedding (1)
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sedimentation (7)
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sediments (1)
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South America
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Andes
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Central Andes (1)
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Eastern Cordillera (2)
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Brazil
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Araripe Basin (1)
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Ceara Brazil (1)
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Pernambuco Brazil (1)
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Chile (2)
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Colombia
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Cusiana Field (1)
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Magdalena Valley (1)
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Guiana Shield (1)
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stratigraphy (7)
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structural analysis (2)
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structural geology (2)
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sulfur
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S-34/S-32 (1)
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tectonics
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neotectonics (5)
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United States
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Anadarko Basin (1)
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Ardmore Basin (1)
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Arizona
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Apache County Arizona (1)
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Coconino County Arizona (1)
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Arkansas (1)
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California
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Sierra Nevada Batholith (1)
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Southern California (1)
-
-
Colorado
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Colorado mineral belt (1)
-
La Plata County Colorado (1)
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San Juan volcanic field (1)
-
Sawatch Range (1)
-
-
Colorado Plateau (6)
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Mississippi River (1)
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Mojave Desert (1)
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New Mexico
-
Bernalillo County New Mexico (1)
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Jemez Mountains (1)
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Los Alamos County New Mexico
-
Los Alamos National Laboratory (1)
-
-
McKinley County New Mexico (1)
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Pajarito Plateau (2)
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Picuris Range (1)
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Rio Arriba County New Mexico
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Nacimiento Mountains (1)
-
-
San Juan County New Mexico (2)
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Sandoval County New Mexico (2)
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Santa Fe County New Mexico (2)
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Taos County New Mexico
-
Questa Caldera (2)
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Questa Mine (1)
-
-
Taos Plateau (2)
-
Tusas Mountains (1)
-
Valencia County New Mexico (1)
-
-
Oklahoma
-
Wichita Mountains (1)
-
-
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
El Rito Formation
Supplementary Data for : A Preliminary Basin Analysis of the El Rito Formation (Eocene), North-Central New Mexico Available to Purchase
A preliminary basin analysis of the El Rito Formation (Eocene), north-central New Mexico Available to Purchase
Preliminary Basin Analysis of El Rito Formation (Eocene), North-Central New Mexico Available to Purchase
Deformational and erosional history for the Abiquiu and contiguous area, north-central New Mexico: Implications for formation of the Abiquiu embayment and a discussion of new geochronological and geochemical analysis Available to Purchase
Geologic mapping, age determinations, and geochemistry of rocks exposed in the Abiquiu area of the Abiquiu embayment of the Rio Grande rift, north-central New Mexico, provide data to determine fault-slip and incision rates. Vertical-slip rates for faults in the area range from 16 m/m.y. to 42 m/m.y., and generally appear to decrease from the eastern edge of the Colorado Plateau to the Abiquiu embayment. Incision rates calculated for the period ca. 10 to ca. 3 Ma indicate rapid incision with rates that range from 139 m/m.y. on the eastern edge of the Colorado Plateau to 41 m/m.y. on the western part of the Abiquiu embayment. The Abiquiu area is located along the margin of the Colorado Plateau–Rio Grande rift and lies within the Abiquiu embayment, a shallow, early extensional basin of the Rio Grande rift. Cenozoic rocks include the Eocene El Rito Formation, Oligocene Ritito Conglomerate, Oligocene–Miocene Abiquiu Formation, and Miocene Chama–El Rito and Ojo Caliente Sandstone Members of the Tesuque Formation (Santa Fe Group). Volcanic rocks include the Lobato Basalt (Miocene; ca. 15–8 Ma), El Alto Basalt (Pliocene; ca. 3 Ma), and dacite of the Tschicoma Formation (Pliocene; ca. 2 Ma). Quaternary deposits consist of inset axial and side-stream deposits of the ancestral Rio Chama (Pleistocene in age), landslide and pediment alluvium and colluvium, and Holocene main and side-stream channel and floodplain deposits of the modern Rio Chama. The predominant faults are Tertiary normal high-angle faults that displace rocks basinward. A low-angle fault, referred to as the Abiquiu fault, locally separates an upper plate composed of the transitional zone of the Ojo Caliente Sandstone and Chama–El Rito Members from a lower plate consisting of the Abiquiu Formation or the Ritito Conglomerate. The upper plate is distended into blocks that range from about 0.1 km to 3.5 km long that may represent a larger sheet that has been broken up and partly eroded. Geochronology ( 40 Ar/ 39 Ar) from fifteen volcanic and intrusive rocks resolves discrete volcanic episodes in the Abiquiu area: (1) emplacement of Early and Late Miocene basaltic dikes at 20 Ma and ca. 10 Ma; (2) extensive Late Miocene–age lava flows at 9.5 Ma, 7.9 Ma, and 5.6 Ma; and (3) extensive basaltic eruptions during the early Pliocene at 2.9 Ma and 2.4 Ma. Clasts of biotite- and hornblende-rich trachyandesites and trachydacites from the base of the Abiquiu Formation are dated at ca. 27 Ma, possibly derived from the Latir volcanic field. The most-mafic magmas are interpreted to be generated from a similar lithospheric mantle during rifting, but variations in composition are correlated with partial melting at different depths, which is correlated with thinning of the crust due to extensional processes.
A geophysical model of the Espanola Basin, Rio Grande Rift, New Mexico Available to Purchase
Annotated Bibliography of the Eocene Paleontology and Stratigraphy of New Mexico Available to Purchase
Cenozoic sedimentation and paleotectonics of north-central New Mexico: Implications for initiation and evolution of the Rio Grande rift Available to Purchase
Oblique Extension and Basinward Tilting along the Cañones Fault Zone, West Margin of the Rio Grande Rift Available to Purchase
Abstract The Cañones fault zone in north-central New Mexico is a boundary between the Colorado Plateau to the west and the Rio Grande rift to the east. It consists of a major fault, the Cañones fault, and a series of synthetic and antithetic normal faults within the Abiquiu embayment in the northwestern Española basin. The Cañones fault is a southeast-dipping high-angle normal fault, striking ~N20°E in the south, N40°E in the middle, and east-west at its northern end. The synthetic and antithetic faults are sub-parallel to the major fault. Detailed fault kinematic studies from the master fault reveal that the trends of slickenlines range S85°E - S70°E, and average approximately S76°E. Slickenlines on antithetic faults trend S20°W – N30°W, clustering at ~ N70°W. The attitude of fault surfaces and slickenlines indicate east-southeast/west-northwest extension within the Cañones Fault Zone. The sense of motion on the major fault is normal dominantly with left-slip. Fault throw is at least 225 m, based on Mesozoic units as hanging wall and footwall cutoffs. Thus, the heave is as ~143 m and the left-lateral displacement is ~60 m, given the averaged fault attitudes. In contrast to sub-horizontal Permian-Triassic units in its footwall, hanging wall strata of the Cañones fault zone dips in two directions: west-dipping Jurassic Entrada, Todilto, and Morrison formations; and south-east-dipping Eocene El Rito, Oligocene Ritito, and Oligocene-Miocene Abiquiu formations. Tilted Jurassic strata suggest that the overall structure is monoclinal, probably resulting from Laramide orogeny shortening. The Eocene-Miocene basin fill sediments, surprisingly, dip 10° – 30° away from the Cañones Fault, instead of dipping northwest towards the fault. This phenomenon, in contrast to the prediction of the rollover structure, suggests a different mechanism on this fault zone. Field observation provides direct evidence that basinward tilting is accommodated by multiple antithetic normal faults that cut through Permian to Miocene units. We propose that extensional fault-propagation folding model is a possible mechanism to result in the regional tilting of the basin fill. During upward propagation of the fault tip, horizontal-axis rotation and antithetic and synthetic faulting occur within a triangle zone above the fault tip. Alternatively, a buried large-scale low-angle normal fault can also generate such basinward tilting. In this scenario, the Cañones fault and other southeast-dipping normal faults are antithetic faults that grow on the detachment. These hypothetical mechanisms take into account the antithetic faulting within a rift-bounding fault zone and can be indicative of the evolution of other rift basins in which basin fills dip to the axis, such as the eastern Española basin and San Luis basin in northern New Mexico and southern Colorado.
Chronology of volcanism, tectonics, and sedimentation near the western boundary fault of the Española Basin, Rio Grande rift, New Mexico Available to Purchase
New 40 Ar/ 39 Ar results from drill-hole cuttings of basaltic and basaltic andesite flows from the Guaje well field of the Pajarito Plateau along the western part of the Española Basin in north-central New Mexico yielded Middle Miocene ages (11.5–13.2 Ma). The volcanic eruptions were closely associated with intense faulting, subsidence, and sedimentation, and the results provide age constraints for the volcanic and tectonic processes along the western margin of the Española Basin. The Middle Miocene volcanic rocks are interbedded within the Santa Fe Group, which is divided into the Hernandez and Vallito Members of the Chamita Formation and the Chama–El Rito Member of the Tesuque Formation, in descending stratigraphic order. New and published geochemical results from the Guaje well field and from other surface and subsurface mafic and intermediate lava flows within the Pajarito Plateau suggest that the volcanic rocks erupted from different magmatic sources and centers close to the Pajarito fault zone. Multiple pulses of volcanic eruptions mostly confined to the hanging wall of the Pajarito fault zone, which represents the current western boundary fault of the Española Basin, suggest that the Pajarito fault system has been sporadically reactivated several times, beginning at least in the Middle Miocene and continuing to the Plio-Pleistocene. Moreover, the volcanic, tectonic, and sedimentary records in the Pajarito Plateau suggest that there is no evidence for eastward migration of tectonic and volcanic activities from the Cañada de Cochiti fault zone in the southern part of the Jemez Mountains to the Pajarito fault zone during the early Pliocene (4–5 Ma).