- 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
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Canada
-
Western Canada
-
British Columbia (1)
-
-
-
Front Range (4)
-
Lake George (1)
-
Mosquito Range (3)
-
North America
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
Southern Rocky Mountains (1)
-
U. S. Rocky Mountains
-
Sawatch Range (1)
-
Wet Mountains (1)
-
-
-
-
United States
-
Arizona
-
Cochise County Arizona
-
Bisbee Arizona (1)
-
-
-
Arkansas River valley (1)
-
California
-
Modoc County California (1)
-
-
Cheyenne Belt (1)
-
Colorado
-
Boulder County Colorado (1)
-
Chaffee County Colorado (2)
-
Clear Creek County Colorado (4)
-
Colorado mineral belt (1)
-
Custer County Colorado (1)
-
Douglas County Colorado (1)
-
Eagle County Colorado (1)
-
El Paso County Colorado (4)
-
Fremont County Colorado (5)
-
Gilpin County Colorado (3)
-
Grand County Colorado (1)
-
Gunnison County Colorado (1)
-
Jefferson County Colorado (3)
-
Lake County Colorado
-
Leadville Colorado (1)
-
-
Larimer County Colorado (1)
-
Mineral County Colorado (1)
-
Ouray County Colorado (1)
-
Park County Colorado
-
Alma mining district (1)
-
-
Pikes Peak Batholith (1)
-
Pitkin County Colorado (1)
-
Pueblo County Colorado (3)
-
Saguache County Colorado (2)
-
Sawatch Range (1)
-
Summit County Colorado (1)
-
Teller County Colorado (4)
-
Wet Mountains (1)
-
-
New Mexico
-
Grant County New Mexico (1)
-
-
Oregon (1)
-
Texas
-
Presidio County Texas (1)
-
-
U. S. Rocky Mountains
-
Sawatch Range (1)
-
Wet Mountains (1)
-
-
Virginia
-
Wythe County Virginia (1)
-
-
Washington
-
Ferry County Washington (1)
-
-
Western U.S. (1)
-
Wyoming
-
Lincoln County Wyoming (1)
-
-
-
-
commodities
-
metal ores
-
gold ores (2)
-
lead ores (1)
-
polymetallic ores (2)
-
silver ores (1)
-
uranium ores (1)
-
zinc ores (1)
-
-
mineral deposits, genesis (4)
-
mineral exploration (1)
-
-
elements, isotopes
-
metals
-
rare earths
-
yttrium (1)
-
-
-
-
fossils
-
Chordata
-
Vertebrata
-
Pisces
-
Osteichthyes
-
Actinopterygii
-
Teleostei (1)
-
-
-
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Perissodactyla (1)
-
-
-
-
-
-
-
coprolites (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta (1)
-
-
-
-
-
geochronology methods
-
Ar/Ar (1)
-
fission-track dating (1)
-
U/Pb (1)
-
-
geologic age
-
Cenozoic
-
Tertiary
-
Florissant Lake Beds (1)
-
Paleogene
-
Eocene
-
Green River Formation (1)
-
middle Eocene
-
Laney Shale Member (1)
-
-
upper Eocene
-
Chadronian (1)
-
-
-
Oligocene
-
Creede Formation (1)
-
-
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous (1)
-
-
-
Paleozoic
-
Carboniferous
-
Mississippian
-
Leadville Formation (1)
-
-
Pennsylvanian (1)
-
-
Ordovician
-
Lower Ordovician
-
Manitou Formation (1)
-
-
-
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Paleoproterozoic (2)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
hypabyssal rocks (1)
-
plutonic rocks
-
granites (4)
-
pegmatite (3)
-
quartz monzonite (1)
-
-
volcanic rocks
-
basalts
-
shoshonite (1)
-
-
-
-
-
metamorphic rocks
-
metamorphic rocks
-
metavolcanic rocks (1)
-
-
-
minerals
-
halides
-
fluorides
-
fluorite (1)
-
-
-
minerals (5)
-
oxides
-
rutile (1)
-
-
phosphates
-
apatite (1)
-
-
silicates
-
framework silicates
-
feldspar group
-
alkali feldspar
-
amazonite (1)
-
microcline (1)
-
-
-
silica minerals
-
quartz
-
smoky quartz (1)
-
-
-
-
orthosilicates
-
nesosilicates
-
euclase (1)
-
-
-
-
sulfides
-
sphalerite (1)
-
-
sulfosalts
-
sulfantimonites
-
tetrahedrite (1)
-
-
sulfarsenites
-
tennantite (1)
-
-
-
-
Primary terms
-
absolute age (2)
-
Canada
-
Western Canada
-
British Columbia (1)
-
-
-
Cenozoic
-
Tertiary
-
Florissant Lake Beds (1)
-
Paleogene
-
Eocene
-
Green River Formation (1)
-
middle Eocene
-
Laney Shale Member (1)
-
-
upper Eocene
-
Chadronian (1)
-
-
-
Oligocene
-
Creede Formation (1)
-
-
-
-
-
Chordata
-
Vertebrata
-
Pisces
-
Osteichthyes
-
Actinopterygii
-
Teleostei (1)
-
-
-
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Perissodactyla (1)
-
-
-
-
-
-
-
coprolites (1)
-
crust (3)
-
crystal chemistry (1)
-
crystal growth (1)
-
crystal structure (1)
-
crystallography (1)
-
data processing (1)
-
deformation (1)
-
ecology (1)
-
economic geology (4)
-
faults (4)
-
geochemistry (1)
-
geochronology (2)
-
geomorphology (2)
-
geophysical methods (1)
-
glacial geology (1)
-
hydrology (1)
-
igneous rocks
-
hypabyssal rocks (1)
-
plutonic rocks
-
granites (4)
-
pegmatite (3)
-
quartz monzonite (1)
-
-
volcanic rocks
-
basalts
-
shoshonite (1)
-
-
-
-
inclusions
-
fluid inclusions (1)
-
-
intrusions (2)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta (1)
-
-
-
-
lava (1)
-
magmas (2)
-
maps (3)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous (1)
-
-
-
metal ores
-
gold ores (2)
-
lead ores (1)
-
polymetallic ores (2)
-
silver ores (1)
-
uranium ores (1)
-
zinc ores (1)
-
-
metals
-
rare earths
-
yttrium (1)
-
-
-
metamorphic rocks
-
metavolcanic rocks (1)
-
-
metamorphism (2)
-
metasomatism (3)
-
mineral deposits, genesis (4)
-
mineral exploration (1)
-
mineralogy (7)
-
minerals (5)
-
North America
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
Southern Rocky Mountains (1)
-
U. S. Rocky Mountains
-
Sawatch Range (1)
-
Wet Mountains (1)
-
-
-
-
orogeny (2)
-
paleoclimatology (1)
-
paleontology (3)
-
Paleozoic
-
Carboniferous
-
Mississippian
-
Leadville Formation (1)
-
-
Pennsylvanian (1)
-
-
Ordovician
-
Lower Ordovician
-
Manitou Formation (1)
-
-
-
-
paragenesis (1)
-
petrology (3)
-
plate tectonics (1)
-
pollution (1)
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Paleoproterozoic (2)
-
-
-
-
remote sensing (1)
-
sedimentary rocks (3)
-
sediments (1)
-
spectroscopy (1)
-
stratigraphy (2)
-
structural geology (2)
-
tectonics (5)
-
tectonophysics (1)
-
United States
-
Arizona
-
Cochise County Arizona
-
Bisbee Arizona (1)
-
-
-
Arkansas River valley (1)
-
California
-
Modoc County California (1)
-
-
Cheyenne Belt (1)
-
Colorado
-
Boulder County Colorado (1)
-
Chaffee County Colorado (2)
-
Clear Creek County Colorado (4)
-
Colorado mineral belt (1)
-
Custer County Colorado (1)
-
Douglas County Colorado (1)
-
Eagle County Colorado (1)
-
El Paso County Colorado (4)
-
Fremont County Colorado (5)
-
Gilpin County Colorado (3)
-
Grand County Colorado (1)
-
Gunnison County Colorado (1)
-
Jefferson County Colorado (3)
-
Lake County Colorado
-
Leadville Colorado (1)
-
-
Larimer County Colorado (1)
-
Mineral County Colorado (1)
-
Ouray County Colorado (1)
-
Park County Colorado
-
Alma mining district (1)
-
-
Pikes Peak Batholith (1)
-
Pitkin County Colorado (1)
-
Pueblo County Colorado (3)
-
Saguache County Colorado (2)
-
Sawatch Range (1)
-
Summit County Colorado (1)
-
Teller County Colorado (4)
-
Wet Mountains (1)
-
-
New Mexico
-
Grant County New Mexico (1)
-
-
Oregon (1)
-
Texas
-
Presidio County Texas (1)
-
-
U. S. Rocky Mountains
-
Sawatch Range (1)
-
Wet Mountains (1)
-
-
Virginia
-
Wythe County Virginia (1)
-
-
Washington
-
Ferry County Washington (1)
-
-
Western U.S. (1)
-
Wyoming
-
Lincoln County Wyoming (1)
-
-
-
-
sedimentary rocks
-
sedimentary rocks (3)
-
-
sedimentary structures
-
channels (1)
-
coprolites (1)
-
-
sediments
-
sediments (1)
-
Park County Colorado
A latest Eocene (Chadronian) brontothere (Mammalia, Perissodactyla) from the Antero Formation, South Park, Colorado
Interacting geomorphic and ecological response of step-pool streams after wildfire
Magnetic stratigraphy of the Eocene-Oligocene floral transition in western North America
Eocene and Oligocene floras of the western United States show a climatic deterioration from warmer conditions to much cooler and drier conditions. Recent 40 Ar/ 39 Ar dates and magnetic stratigraphy have greatly improved their correlation. In this study, the uppermost Eocene Antero Formation, Colorado, is entirely reversed in polarity, and is correlated with late Chron C13r, based on 40 Ar/ 39 Ar dates of 33.77–33.89 Ma. The early Oligocene Pitch-Pinnacle flora of Colorado is within rocks of normal polarity, and best correlated with Chron C12n (30.5–31.0 Ma), based on 40 Ar/ 39 Ar dates of 32.9–29.0 Ma (although correlation with Chron C11n is also possible). The late Oligocene ( 40 Ar/ 39 Ar dated 26.26–26.92 Ma) Creede flora of southwestern Colorado is correlated with Chron C8r. The early Oligocene ( 40 Ar/ 39 Ar dated at 31.5 Ma) Granger Canyon flora in the Warner Mountains, near Cedarville, northeastern California, is correlated with Chron C12r. These results are compiled with previously published dates and magnetic stratigraphy of the Eugene-Fisher floral sequence in western Oregon, the Bridge Creek floras in central Oregon, other floras in the Warner Mountains of northeast California, and the Florissant flora of central Colorado. In Colorado, the climatic change seems to have occurred between the Florissant and Antero floras, and is dated between 33.89 and 34.07 Ma, or latest Eocene in age, although the Pitch-Pinnacle flora suggests that the deterioration was less severe and took place in the early Oligocene. In northeast California, the dating is not as precise, so the climatic change could have occurred between 31.5 and 34.0 Ma (probably early Oligocene). In western Oregon (Eugene and Fisher Formations), the change occurs between the early Oligocene Goshen flora (33.4 Ma) and the early Oligocene Rujada flora (31.5 Ma). In the John Day region of Oregon, it occurs before the oldest Bridge Creek flora, dated at 33.62 Ma (right after the Eocene-Oligocene boundary). Thus, only two of these four floral sequences (Eugene, Oregon, and Cedarville, California) clearly show the early Oligocene climatic change consistent with that documented in the global marine record, whereas the climatic change was seemingly abrupt in the late Eocene in Colorado between 33.89 and 34.07 Ma, and also sometime during the late Eocene (before 33.62 Ma) in central Oregon.