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Filter Total Items: 9493
Shaded relief and surface markings of the eastern and western regions of Mars
No abstract available.
Shaded relief maps of the eastern, western, and polar regions of Mars
No abstract available.
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, 1983; 1985
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 4 ft. It
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 of the st
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 structura
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 Buffalo Peaks W
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 range from ab
Surficial geologic map of the Botsford Quadrangle, Connecticut
No abstract available.