Maps
Fundamental Science Practices
USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. They also organize, maintain, and publish the geospatial baseline of the Nation's topography, natural landscape, built environment and more.
Geologic Maps
Geologic Maps
Map Releases
Map Releases
Topo Maps
Topo Maps
Volcanic Maps
Volcanic Maps
All Maps
All Maps
Filter Total Items: 9590
Seismotectonic map of the Puget Sound region, Washington Seismotectonic map of the Puget Sound region, Washington
The Puget Sound region is a seismically active area with hundreds of earthquakes occurring each year (Crosson, 1974, 1975, Crosson and Millard, 1975, Crosson and Noson, 1978a, 1978b, 1979). Most of the earthquakes are so small that they can be detected only by sensitive seismographs such as those operated by the University of Washington. Not all of the earthquakes have been small...
Stratigraphic cross section and coal bed correlations of uppermost Cretaceous and Paleocene rocks between Painted Canyon and Davis Buttes, North Dakota Stratigraphic cross section and coal bed correlations of uppermost Cretaceous and Paleocene rocks between Painted Canyon and Davis Buttes, North Dakota
Recent detailed coal studies in the area between Havelock and Fryburg, N. Dak. (Hinds, 1983; 1985), have resulted in some revised coal-bed correlations that are, in places, in disagreement with previous work (Banet, 1980; Hares, 1928; Lewis, 1979; Menge, 1977; Owen, 1979; Rehbein, 1977; Royse, 1967). The strati graphically most important of these have been specifically discussed (Hinds...
Stratigraphic cross sections and correlation of lignites in the Sentinel Butte member and upper part of the Tongue River member of the Fort Union Formation between Amidon and Fryburg, North Dakota Stratigraphic cross sections and correlation of lignites in the Sentinel Butte member and upper part of the Tongue River member of the Fort Union Formation between Amidon and Fryburg, North Dakota
The Austin Farm bed was once mined form an adit in the SE1/4 sec, T. 136 N., R. 101 W. Its westerly outcrop extends from that point northward along the east side and north end of the valley of Third Creek at elevations between about 2740 and 2800 ft. It is the uppermost lignite bed preserved on Hanley and Cliffs Plateaus in T. 137 N., R. 101 W., where its thickness is generally from 2 to...
Stratigraphic framework of the upper Fort Union Formation, TA Hills, Western Powder River basin, Wyoming Stratigraphic framework of the upper Fort Union Formation, TA Hills, Western Powder River basin, Wyoming
The purpose of this study is to interpret a relationship between the stratigraphy and the environment of deposition of the upper part of the Fort Union Formation in the TA Hills in the western part of the Powder River Basin, Johnson County, Wyoming. This framework was used to map and correlate coal beds with those mapped by Hose (1955) and Mapel (1959) in the southern and northern parts...
Stratigraphic sections, depositional environments, and metal content of the upper part of the Middle Pennsylvanian Minturn Formation, Northern Sangre De Cristo Range, Custer and Saguache counties, Colorado Stratigraphic sections, depositional environments, and metal content of the upper part of the Middle Pennsylvanian Minturn Formation, Northern Sangre De Cristo Range, Custer and Saguache counties, Colorado
The calcareous upper part of the 2,000-meter-thick Middle Pennsylvanian Minturn Formation (Lindsey and others, 1985) in the northern Sangre de Cristo Range is a key stratigraphic interval for correlating rocks and mapping the structure of the range. The stratigraphy of this complex and heretofore poorly known interval is reported here in order to provide a basis for correlation among the
Stream-sediment and panned-concentrate geochemical maps of the Buffalo Peaks Wilderness Study Area, Lake, Park, and Chaffee counties, Colorado Stream-sediment and panned-concentrate geochemical maps of the Buffalo Peaks Wilderness Study Area, Lake, Park, and Chaffee counties, Colorado
Under provisions of the Wilderness Act (Public Law 88-577, September 3, 1964), the U.S. Geological Survey and the U.S. Bureau of Mines have been conducting mineral surveys of areas selected for possible inclusion in the National Wilderness Preservation System. This report presents results of geochemical studies carried out in June and July, 1982, as part of the investigation of the...
Summary geochemical map for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate, Freel and Dardanelles Roadless Areas, Alpine and El Dorado Counties, California Summary geochemical map for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate, Freel and Dardanelles Roadless Areas, Alpine and El Dorado Counties, California
The Freel and Dardanelles Roadless Areas lie near the crest of the central Sierra Nevada south of Lake Tahoe in California. The roadless areas (the study area) encompass approximately 51 sq mi in Eldorado and Toiyabe National Forests and in the Lake Tahoe Basin Management Unit, in Alpine and El Dorado Counties, California. The study area is dominated by rugged topography; elevations...