GIS Data
USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps.
Filter Total Items: 9493
Geochemical maps of the Cornplanter Roadless Area, Warren County, Pennsylvania
The U.S. Geological Survey (USGS) made a reconnaissance geochemical survey of the Cornplanter Roadless Area (fig. 1) to test for indistinct or unexposed mineral deposits that might be recognized by their geochemical halos or patterns formed by the distribution of trace elements. Lesure, assisted by Andrew E. Grosz, collected 22 stream-sediment, 63 soil, and 23 rock samples from within and dear the
Geochemical maps of the Gallatin Divide Roadless Area, Gallatin and Park counties, Montana
No abstract available.
Geochemical maps of the Moses and Dennison Peak Roadless Areas, Tulare County, California
No abstract available.
Geochemical maps of the Wonder Mountain Roadless Area, Mason County, Washington
No abstract available.
Geochemical survey of the Adams Gap and Shinbone Creek Roadless Areas, Clay County, Alabama
The U.S. Geological Survey (USGS) made a reconnaissance geochemical survey of the Adams Gap and Shinbone Creek Roadless Areas (fig. 1) to test for unidentified, indistinct, or unexposed mineral deposits that might be recognized by their geochemical halos or patterns formed by the distribution of trace elements. Similar geochemical surveys based on trace element analyses have been credited with the
Geochemical survey of the Cheat Mountain Roadless Area, Randolph County, West Virginia
No abstract available.
Geochemical survey of the Lusk Creek Roadless Area, Pope County, Illinois
The Lusk Creek Roadless Area (Index map) lies along the western edge of the Illinois-Kentucky fluorspar district in which flourite deposits occur as lenticular-type veins emplaced along fult zones or as tratiform-shaped bedding-replacement deposits that occur along fault zones (Grogan and Bradbury, 1967; Trace, 1974). Although mineralogy varies between deposits, Trace (1974) points out that the pr
Geochronometric and lead isotope data on samples from the Wallace 1 degree by 2 degrees Quadrangle, Montana and Idaho
Most of the bedrock in the Wallace quadrangle belongs to the Belt Supergroup, a thick (about 18,000 m) sequence of generally fine-grained clastic and carbonate rocks of Middle Proterozoic age. Regional metamorphism prior to Cambrian time prograded the Belt rocks to greenschist facies, and some metal-bearing veins were emplaced in fractures. The Belt rocks were intruded in Late Proterozoic time b