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
-
Karoo Basin (1)
-
South Africa
-
Cape Province region (1)
-
-
-
-
Central America
-
Panama
-
Panama Canal Zone (4)
-
-
-
East Bay (1)
-
North America
-
Basin and Range Province (2)
-
Great Plains (4)
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
U. S. Rocky Mountains (1)
-
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
Mendocino fracture zone (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
Mendocino fracture zone (1)
-
-
-
-
San Andreas Fault (2)
-
United States
-
Arizona (1)
-
California
-
Contra Costa County California (1)
-
Inyo County California (1)
-
Modoc County California (1)
-
Riverside County California (2)
-
San Bernardino County California
-
Barstow California (1)
-
-
San Francisco Bay region (1)
-
San Gabriel Fault (1)
-
Southern California (5)
-
Transverse Ranges (2)
-
-
Colorado
-
Mineral County Colorado (1)
-
Park County Colorado (2)
-
Saguache County Colorado (1)
-
Teller County Colorado
-
Florissant Fossil Beds National Monument (1)
-
-
-
Colorado Plateau (1)
-
Death Valley National Park (1)
-
Idaho (1)
-
Mojave Desert (5)
-
Montana
-
Granite County Montana (1)
-
Powell County Montana (1)
-
-
Nebraska
-
Antelope County Nebraska (1)
-
Knox County Nebraska (1)
-
-
Oregon
-
Grant County Oregon (2)
-
Wasco County Oregon (1)
-
Wheeler County Oregon (1)
-
-
Southwestern U.S. (1)
-
Texas (1)
-
U. S. Rocky Mountains (1)
-
Washington
-
Franklin County Washington (1)
-
-
Wyoming
-
Teton County Wyoming
-
Jackson Hole (1)
-
-
-
-
White River (1)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (2)
-
-
isotope ratios (2)
-
isotopes
-
stable isotopes
-
C-13/C-12 (2)
-
O-18/O-16 (2)
-
-
-
oxygen
-
O-18/O-16 (2)
-
-
-
fossils
-
burrows (1)
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia
-
Labyrinthodontia (1)
-
-
Aves (2)
-
Mammalia
-
Theria
-
Eutheria
-
Artiodactyla
-
Ruminantia
-
Tylopoda
-
Camelidae (1)
-
-
-
-
Carnivora
-
Fissipeda
-
Canidae (1)
-
-
-
Chiroptera (1)
-
Lagomorpha (1)
-
Perissodactyla
-
Ceratomorpha
-
Rhinocerotidae
-
Rhinoceros (1)
-
-
-
Hippomorpha
-
Equidae (3)
-
-
-
Proboscidea (1)
-
Rodentia
-
Myomorpha
-
Cricetidae (1)
-
-
-
-
-
-
Reptilia
-
Synapsida
-
Therapsida
-
Dicynodontia
-
Lystrosaurus (1)
-
-
-
-
-
-
-
-
coprolites (1)
-
ichnofossils (2)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda
-
Podocopida
-
Cypridocopina
-
Cyprididae (1)
-
-
-
-
-
-
-
Mollusca
-
Gastropoda (3)
-
-
Protista
-
Foraminifera (2)
-
-
-
microfossils (5)
-
palynomorphs (1)
-
Plantae
-
algae
-
diatoms (1)
-
-
Pteridophyta
-
Lycopsida (1)
-
-
-
tracks (1)
-
-
geochronology methods
-
Ar/Ar (4)
-
K/Ar (1)
-
paleomagnetism (3)
-
Sm/Nd (1)
-
tephrochronology (1)
-
U/Pb (3)
-
-
geologic age
-
Cenozoic
-
middle Cenozoic (1)
-
Quaternary
-
Pleistocene (1)
-
-
Tertiary
-
Arikaree Group (1)
-
Arikareean (3)
-
Florissant Lake Beds (2)
-
John Day Formation (4)
-
middle Tertiary (1)
-
Neogene
-
Bidahochi Formation (1)
-
Furnace Creek Formation (1)
-
Hemphillian (1)
-
Miocene
-
Ash Hollow Formation (1)
-
Barstow Formation (5)
-
Clarendonian (1)
-
lower Miocene
-
Hemingfordian (1)
-
-
middle Miocene (6)
-
upper Miocene (1)
-
Valentine Formation (1)
-
-
Ogallala Formation (2)
-
Pliocene (3)
-
-
Paleogene
-
Eocene
-
Clarno Formation (1)
-
upper Eocene
-
Chadronian (2)
-
-
-
Oligocene
-
Creede Formation (1)
-
upper Oligocene (2)
-
-
Renova Formation (1)
-
White River Group (1)
-
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Harebell Formation (1)
-
-
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
-
-
-
Paleozoic
-
Permian
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
volcanic rocks
-
basalts (1)
-
pyroclastics
-
tuff (4)
-
-
-
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
eclogite (1)
-
-
-
minerals
-
carbonates
-
calcite (1)
-
-
silicates
-
sheet silicates
-
mica group
-
biotite (1)
-
-
-
-
sulfates
-
barite (1)
-
-
-
Primary terms
-
absolute age (5)
-
Africa
-
Southern Africa
-
Karoo Basin (1)
-
South Africa
-
Cape Province region (1)
-
-
-
-
atmosphere (1)
-
biogeography (3)
-
carbon
-
C-13/C-12 (2)
-
-
Cenozoic
-
middle Cenozoic (1)
-
Quaternary
-
Pleistocene (1)
-
-
Tertiary
-
Arikaree Group (1)
-
Arikareean (3)
-
Florissant Lake Beds (2)
-
John Day Formation (4)
-
middle Tertiary (1)
-
Neogene
-
Bidahochi Formation (1)
-
Furnace Creek Formation (1)
-
Hemphillian (1)
-
Miocene
-
Ash Hollow Formation (1)
-
Barstow Formation (5)
-
Clarendonian (1)
-
lower Miocene
-
Hemingfordian (1)
-
-
middle Miocene (6)
-
upper Miocene (1)
-
Valentine Formation (1)
-
-
Ogallala Formation (2)
-
Pliocene (3)
-
-
Paleogene
-
Eocene
-
Clarno Formation (1)
-
upper Eocene
-
Chadronian (2)
-
-
-
Oligocene
-
Creede Formation (1)
-
upper Oligocene (2)
-
-
Renova Formation (1)
-
White River Group (1)
-
-
-
-
Central America
-
Panama
-
Panama Canal Zone (4)
-
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia
-
Labyrinthodontia (1)
-
-
Aves (2)
-
Mammalia
-
Theria
-
Eutheria
-
Artiodactyla
-
Ruminantia
-
Tylopoda
-
Camelidae (1)
-
-
-
-
Carnivora
-
Fissipeda
-
Canidae (1)
-
-
-
Chiroptera (1)
-
Lagomorpha (1)
-
Perissodactyla
-
Ceratomorpha
-
Rhinocerotidae
-
Rhinoceros (1)
-
-
-
Hippomorpha
-
Equidae (3)
-
-
-
Proboscidea (1)
-
Rodentia
-
Myomorpha
-
Cricetidae (1)
-
-
-
-
-
-
Reptilia
-
Synapsida
-
Therapsida
-
Dicynodontia
-
Lystrosaurus (1)
-
-
-
-
-
-
-
-
climate change (6)
-
coprolites (1)
-
crust (1)
-
data processing (1)
-
deformation (1)
-
ecology (1)
-
faults (4)
-
folds (1)
-
geochemistry (1)
-
geochronology (2)
-
geophysical methods (1)
-
ichnofossils (2)
-
igneous rocks
-
volcanic rocks
-
basalts (1)
-
pyroclastics
-
tuff (4)
-
-
-
-
inclusions (1)
-
intrusions (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda
-
Podocopida
-
Cypridocopina
-
Cyprididae (1)
-
-
-
-
-
-
-
Mollusca
-
Gastropoda (3)
-
-
Protista
-
Foraminifera (2)
-
-
-
isotopes
-
stable isotopes
-
C-13/C-12 (2)
-
O-18/O-16 (2)
-
-
-
lava (1)
-
maps (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Harebell Formation (1)
-
-
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
-
-
-
metamorphic rocks
-
eclogite (1)
-
-
North America
-
Basin and Range Province (2)
-
Great Plains (4)
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
U. S. Rocky Mountains (1)
-
-
-
ocean circulation (1)
-
oxygen
-
O-18/O-16 (2)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
Mendocino fracture zone (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Gulf of California (1)
-
Mendocino fracture zone (1)
-
-
-
-
paleoclimatology (9)
-
paleoecology (9)
-
paleogeography (6)
-
paleomagnetism (3)
-
Paleozoic
-
Permian
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
-
palynomorphs (1)
-
Plantae
-
algae
-
diatoms (1)
-
-
Pteridophyta
-
Lycopsida (1)
-
-
-
plate tectonics (3)
-
sedimentary petrology (1)
-
sedimentary rocks
-
carbonate rocks
-
limestone (1)
-
-
chemically precipitated rocks
-
evaporites (1)
-
tufa (1)
-
-
clastic rocks
-
conglomerate (1)
-
sandstone (2)
-
-
-
sedimentary structures
-
secondary structures
-
concretions (3)
-
-
-
sedimentation (2)
-
sediments
-
clastic sediments
-
loess (3)
-
mud (1)
-
-
-
soils (1)
-
stratigraphy (4)
-
structural analysis (1)
-
structural geology (1)
-
tectonics
-
neotectonics (1)
-
-
United States
-
Arizona (1)
-
California
-
Contra Costa County California (1)
-
Inyo County California (1)
-
Modoc County California (1)
-
Riverside County California (2)
-
San Bernardino County California
-
Barstow California (1)
-
-
San Francisco Bay region (1)
-
San Gabriel Fault (1)
-
Southern California (5)
-
Transverse Ranges (2)
-
-
Colorado
-
Mineral County Colorado (1)
-
Park County Colorado (2)
-
Saguache County Colorado (1)
-
Teller County Colorado
-
Florissant Fossil Beds National Monument (1)
-
-
-
Colorado Plateau (1)
-
Death Valley National Park (1)
-
Idaho (1)
-
Mojave Desert (5)
-
Montana
-
Granite County Montana (1)
-
Powell County Montana (1)
-
-
Nebraska
-
Antelope County Nebraska (1)
-
Knox County Nebraska (1)
-
-
Oregon
-
Grant County Oregon (2)
-
Wasco County Oregon (1)
-
Wheeler County Oregon (1)
-
-
Southwestern U.S. (1)
-
Texas (1)
-
U. S. Rocky Mountains (1)
-
Washington
-
Franklin County Washington (1)
-
-
Wyoming
-
Teton County Wyoming
-
Jackson Hole (1)
-
-
-
-
weathering (3)
-
-
rock formations
-
Monterey Formation (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks
-
limestone (1)
-
-
chemically precipitated rocks
-
evaporites (1)
-
tufa (1)
-
-
clastic rocks
-
conglomerate (1)
-
sandstone (2)
-
-
-
siliciclastics (1)
-
volcaniclastics (3)
-
-
sedimentary structures
-
burrows (1)
-
coprolites (1)
-
sedimentary structures
-
secondary structures
-
concretions (3)
-
-
-
tracks (1)
-
-
sediments
-
sediments
-
clastic sediments
-
loess (3)
-
mud (1)
-
-
-
siliciclastics (1)
-
volcaniclastics (3)
-
-
soils
-
paleosols (6)
-
soils (1)
-
GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Oreodont Tuff
Lithostratigraphy, biostratigraphy, and geochronology of the Barstow Formation, Mojave Desert, southern California Available to Purchase
Paleomagnetism, geochronology, and possible tectonic rotation of the middle Miocene Barstow Formation, Mojave Desert, southern California Available to Purchase
Figure 2. Schematic stratigraphic sections. All age uncertainties are shown... Available to Purchase
Taphonomy and sedimentology of Arikaree (lower Miocene) fluvial, eolian, and lacustrine paleoenvironments, Nebraska and Wyoming; A paleobiota entombed in fine-grained volcaniclastic rocks Available to Purchase
Nonmarine lower Miocene rocks widely exposed in nearly continuous outcrop over approximately 3100 km 2 (1,200 mi 2 ) of the Hartville Table in southeastern Wyoming and western Nebraska indicate a semiarid continental interior, with seasonal climate characterized by sandy ephemeral or intermittent braided streams, interchannel plains mantled by fine-grained volcaniclastic loess, and shallow ephemeral holomictic lakes. These paleoenvironments are recognized on the basis of distinctive sedimentologic, faunal, and taphonomic characteristics. Stream sediments (10 percent or less of total outcrop) are primarily tuffaceous silty sandstones, deposited as reworked pyroclastic debris in wide shallow valleys. These valleys first filled with fluvial fine-grained volcaniclastics, but with the cessation of streamflow in the region, filling was completed by air-fall volcaniclastic loess that blanketed both valleys and interchannel reaches. Fluvial sediments within the valleys include much spatially dispersed mammal bone that had been scavenged and subaerially weathered prior to burial. Waterholes, situated in or adjacent to the valleys, filled with tuff and carbonate mud containing freshwater ostracods, pulmonate gastropods, diatoms, and charophyte algae. These tuffaceous waterhole muds intertongue with fluvial volcaniclastic sediments and are the locus of major mammalian bone beds, the best known preserved at Agate Fossil Beds National Monument. Bones of chalicothere, rhinoceros, and entelodont are common in waterhole bone beds and in fluvial sediments in the region. Massive tuffaceous air-fall silty sandstones (87 percent of outcrop) punctuated by silcrete paleosols were deposited in the interchannel reaches; mammal remains are commonly represented by widely scattered, isolated bones and partial skeletons of young and aged ungulates, chiefly oreodonts and camels, indicative of attritional deaths over time. No bone beds occur. Thin silicified carbonate mudstones (about 2 percent of outcrop) with ostracods, plant debris, and aquatic pulmonate gastropods (but without fish or other aquatic vertebrates) indicate shallow, holomictic, ephemeral lakes that filled with homogeneous micrite mud. These lakes were isolated sheet-like bodies of water unassociated with stream sediments. Following desiccation, lacustrine sediments were commonly overprinted by pedogenic features. Eolian transport of fine pyroclastic detritus into the North American midcontinent was essential to preservation of these sedimentary environments and their rich fossil record. In the Americas and in Africa during the Cenozoic, fine-grained volcaniclastic sediments blanketed large geographic areas within the continental interiors, preserving significant temporal intervals of the vertebrate fossil record. If volcanism had not occurred, these intervals would exist as major hiatuses in our knowledge of vertebrate, particularly mammalian, evolution. The important role of fine-grained volcaniclastics in preservation of mammalian faunas and their associated depositional environments in the Americas and in Africa during the Cenozoic deserves greater emphasis.
Using U-Pb ages of Miocene tufa for correlation in a terrestrial succession, Barstow Formation, California Available to Purchase
Revised Chronostratigraphy and Biostratigraphy of the John Day Formation (Turtle Cove and Kimberly Members), Oregon, with Implications for Updated Calibration of the Arikareean North American Land Mammal Age Available to Purchase
Temporal Calibration and Biochronology of the Centenario Fauna, Early Miocene of Panama Open Access
New Geologic Formation Names in Jackson Hole, Teton County, Northwestern Wyoming Available to Purchase
Exceptionally preserved ostracodes from a Middle Miocene palaeolake, California, USA Available to Purchase
Three-toed Browsing Horse Anchitherium (Equidae) from the Miocene of Panama Available to Purchase
Ecological polarities of mid-Cenozoic fossil plants and animals from central Oregon Available to Purchase
Glacial-interglacial–scale paleoclimatic change without large ice sheets in the Oligocene of central Oregon Available to Purchase
THE INFLUENCE OF DEPOSITIONAL ENVIRONMENT AND BASIN HISTORY ON THE TAPHONOMY OF MAMMALIAN ASSEMBLAGES FROM THE BARSTOW FORMATION (MIDDLE MIOCENE), CALIFORNIA Available to Purchase
Cenozoic Paleoclimate on Land in North America Available to Purchase
Late Paleogene emergence of a North American loess plateau Open Access
A latest Eocene (Chadronian) brontothere (Mammalia, Perissodactyla) from the Antero Formation, South Park, Colorado Available to Purchase
Miocene stratigraphy and structure of the East Bay Hills, California Available to Purchase
ABSTRACT The structure and stratigraphy of the Miocene formations east of San Francisco Bay have been described in multiple studies for over a century. We integrated the results of past investigations and provide new data that improve understanding of formation age, the timing of deformation, and the amount of dextral displacement on selected faults. New geologic mapping and better age control show that formations previously inferred to be separate units of different ages are correlative, and new names are proposed for these units. Miocene structures associated with the development of the San Andreas transform system exerted significant control on Miocene deposition in the East Bay area. The developing structure created five distinct stratigraphic sections that are differentiated on the basis of differences in the stratigraphic sequence, lithology, and age. The stratigraphic changes are attributed to significant dextral displacement, syndepositional faulting, and distal interfingering of sediment from tectonically elevated source areas. New stratigraphic evaluations and age control show that prior to ca. 6 Ma, the developing fault system created local tectonically induced uplift as well as spatially restricted subbasins. Regional folding did not occur until after 6 Ma. Past evaluations have inferred significant dextral displacement on some of the faults in the East Bay. The spatial relationships between unique conglomerate clasts and known source areas, as well as the distribution of well-dated and unique tuffs, suggest that dextral displacement on some faults in the East Bay is less than previously reported.