Geologic time periods

This category is also used for geologic age and geologic time.
Subtopics:
Phanerozoic (24 items)
Precambrian (3 items)

Results listed by similarity [list alphabetically]
Surficial geologic maps along the riparian zone of the Animas River and its headwater tributaries, Silverton to Durango, Colorado, with upper Animas River watershed gradient profiles

This product consists of Adobe Acrobat .PDF format documents for 10 surficial geologic strip maps along the Animas River watershed from its major headwater tributaries, south to Durango, Colo. The Animas River originates in the San Juan Mountains north o

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Quaternary Geologic Map of the Chicago 4° x 6° Quadrangle, United States

The Quaternary Geologic Map of the Chicago 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials

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Quaternary Geologic Map of the Lake Erie 4° x 6° Quadrangle, United States and Canada

The Quaternary Geologic Map of the Lake Erie 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other material

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Quaternary Geologic Map of the Lake Superior 4° x 6° Quadrangle, United States and Canada

The Quaternary Geologic Map of the Lake Superior 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other mate

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Quaternary geologic map of the Winnipeg 4° × 6° quadrangle, United States and Canada

The Quaternary Geologic Map of the Winnipeg 4° × 6° Degree Quadrangle, United States and Canada, is a component of the U.S. Geological Survey Quaternary Geologic Atlas of the United States map series (Miscellaneous Investigations Series I-1420), an eff

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Geologic map of the Saint Joseph area, Missouri and Kansas

The map shows the surficial geology, including alluvium, loess, till, terrace alluvium, eolian silt, glaciofluvial gravel, and bedrock outcrops in the area around St. Joseph, Missouri.

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Generalized Surficial Geologic Map of the Pueblo 1° x 2° Quadrangle, Colorado

Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains

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Surficial geology along the Spokane River, Washington and its relationship to the metal content of sediments (Idaho-Washington stateline to Latah Creek confluence): Geologic units

The Spokane River flows westward into eastern Washington out of the northern end of Lake Coeur d'Alene in northern Idaho. The river and lake lie downstream of the Coeur d'Alene mining district, where over 56 million metric tonnes of metal-enriched tailin

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Surficial geologic map of parts of the Misheguk Mountain and Baird Mountains quadrangles, Noatak National Preserve, Alaska

This dataset represents surficial geologic mapping of parts of the Misheguk Mountain and Baird Mountains quadrangles containing the Noatak National Preserve. It is used to create the mapsheet in 03-367, which shows surficial deposits of the 1:250,000 sca

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Preliminary quaternary geologic maps of Santa Clara Valley, Santa Clara, Alameda, and San Mateo counties, California: A digital database

This digital map database, which is compiled from previously unpublished and open-filed U.S. Geol. Survey reports (Wesling and Helley, 1989), represents the general distribution and identity of Quaternary deposits in eight 7.5 minute quadrangles in the

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Geologic Map of the Ennis 30 X 60 minute quadrangle, Madison and Gallatin counties, Montana

Geologic map of the Ennis 30x60 minute quadrangle, Gallatin and Madison Counties, Montana

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Digital geologic map of the Thirsty Canyon NW quadrangle, Nye County, Nevada

This digital geologic map compilation presents new polygon (i.e., geologic map unit contacts), line (i.e., fault, fold axis, dike, and caldera wall), and point (i.e., structural attitude) vector data for the Thirsty Canyon NW 7 1/2' quadrangle in southern

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Generalized Surficial Geologic Map of the Denver 1°x2° Quadrangle, Colorado

Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Description

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Geologic map of the Jasper quadrangle, Newton and Boone Counties, Arkansas

This digital geologic map compilation presents new polygon (i.e., geologic map unit contacts), line (i.e., fault, fold axis, and structure contour), and point (i.e., structural attitude, contact elevations) vector data for the Jasper 7 1/2' quadrangle in

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Geologic map of Van Bremmer Park Quadrangle, Colfax County, New Mexico

The Raton basin is a large asymmetric syncline (2500 mi2 area) that extends from Huerfano Park, Colorado to Cimarron, New Mexico. As used here, the basin is defined by the limits of the outcrop of the Trinidad Sandstone. The Cretaceous and Tertiary rock

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Geologic map of the Vermejo Park quadrangle, Colfax County, New Mexico, and Las Animas County, Colorado

The Raton basin is a large asymmetric syncline (2500 mi2 area) that extends from Huerfano Park, Colorado to Cimarron, New Mexico. As used here, the basin is defined by the limits of the outcrop of the Trinidad Sandstone. The Cretaceous and Tertiary rock

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Digital Geologic Map of the Penokean Continental Margin, Northern Michigan and Wisconsin

The data on this CD consist of geographic information system (GIS) coverages and tabular data on the geology of Early Proterozoic and Archean rocks in part of the Early Proterozoic Penokean orogeny. The map emphasizes metasedimentary and metavolcanic rock

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Ferricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado

During 1996 to 2000, the Bureau of Land Management, National Park Service, Environmental Protection Agency, United States Department of Agriculture (USDA) Forest Service, and the U.S. Geological Survey (USGS) developed a coordinated strategy to (1) study

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Preliminary maps of Quaternary deposits and liquefaction susceptibility, nine-county San Francisco Bay region, California: a digital database

This report presents a preliminary map and database of Quaternary deposits and liquefaction susceptibility for the nine-county San Francisco Bay region, together with a digital compendium of ground effects associated with past earthquakes in the region. T

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Surficial geology along the Spokane River, Washington and its relationship to the metal content of sediments (Idaho-Washington stateline to Latah Creek confluence): Sediment geochemistry

The Spokane River flows westward into eastern Washington out of the northern end of Lake Coeur d'Alene in northern Idaho. The river and lake lie downstream of the Coeur d'Alene mining district, where over 56 million metric tonnes of metal-enriched tailin

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Quaternary geology and liquefaction susceptibility, Napa, California 1:100,000 quadrangle: A digital database

This Open-File report consists of a digital geologic map database and associated digital plot files and text files, revised from a hard copy by Sowers and others (1995). This digital map database provides current information on Quaternary geology and liq

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Arctic Ostracode Database

The Arctic Ostracode Database provides species census data for about 100 species of benthic marine Ostracoda from modern surface and late Quaternary sediments from various parts of the Arctic Ocean and adjacent seas. Ostracodes are a microfossil group of

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Extent of Pleistocene Lakes in the Western Great Basin

During the Pliocene to middle Pleistocene, pluvial lakes in the western Great Basin repeatedly rose to levels much higher than those of the well-documented late Pleistocene pluvial lakes, and some presently isolated basins were connected. Sedimentologic,

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Maps Showing Inundation Depths, Ice-Rafted Erratics, and Sedimentary Facies of Late Pleistocene Missoula Flood in the Willamette Valley, Oregon

This digital dataset, compiled from previously published and unpublished data sources, contains a personal geodatabase and raster data of features related to the repeated inundation of the Willamette Valley and Portland basin by Missoula Flood waters in L

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Coal-Bearing Regions and Structural Sedimentary Basins of China and Adjacent Seas: Structural sedimentary basins

This dataset is a collection of structural sedimentary basin locations in The Peoples Republic of China. Included in this dataset are the age and name of each structural sedimentary basin.

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Structure contours on Cambrian-Precambrian unconformity

This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian boundary. These data were contributed by Glenn Bear of Indiana University as part of the work on his doctoral thesis. The southern part of the map wa

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Structure contours on Cambrian-Precambrian unconformity

This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian boundary. These data were contributed by Glenn Bear of Indiana University as part of the work on his doctoral thesis. The southern part of the map was

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