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Page 5164, results 129076 - 129100

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Not all publications have extents, not all extents are completely accurate
Intrusive rocks northeast of Steamboat Springs, Park Range, Colorado
George L. Snyder, Carl E. Hedge
1978, Professional Paper 1041
Major Precambrian and minor Tertiary intrusive rocks northeast of Steamboat Springs in the Park Range between 40°30' and 40°45' N. lat. are described and compared with related rocks elsewhere in Colorado and Wyoming. The Precambrian intrusives were emplaced in a sequence of high-grade interlayered felsic gneisses, amphibolites, and pelitic schists...
Metropolitan land cover inventory using multiseasonal Landsat data
William J. Todd, R.N. Hill, C.C. Henry, B.L. Lake
1978, Open-File Report 78-378
As a part of the Pacific Northwest Land Resources Inventory Demonstration Project (PNLRIDP), planners from State, regional, and local agencies in Oregon are working with scientists from the EROS Data Center (USGS), Ames Research Center (NASA), and the Jet Propulsion Laboratory (California Institute of Technology) to obtain practical training and...
Water-level records for the northern High Plains of Colorado, 1974-78
Ronald G. Borman
1978, Open-File Report 78-499
Water-level measurements were made in more than 600 wells in January 1978 in the northern High Plains of Colorado. Changes in water levels from January 1977 to January 1978 ranged from a rise of about 22 feet in Phillips County to a decline of about 14 feet in Yuma County....
K-Ar geochronology of the Survey Pass, Ambler River and Eastern Baird Mountains quadrangles, southwestern Brooks Range, Alaska
Donald L. Turner, R. B. Forbes, C.F. Mayfield
1978, Open-File Report 78-254
We report 76 previously unpublished K-Ar mineral ages from 47 metamorphic and igneous rocks in the southwestern Brooks Range. The pattern of radiometric ages is complex, reflecting the complex geologic history of this area. Local and regional radiometric evidence suggests that the southern Brooks Range schist belt has, at least...
Uranium values from ion-filter water sampling compared with values from bulk-water sampling
Robert Allen Cadigan, J. Karen Felmlee
1978, Open-File Report 78-472
Analytical values of uranium from well water sampled by means of ion-filters were compared with analytical values of the same water sampled by the standard bulk (1-liter) water-sampling technique (Brown, Skougstad and Fishman, 1970). A fluorometric extraction method of analysis was used on both sets of samples. Duplicate samples from...
Mineral resources of the Craggy Mountain Wilderness Study Area, Buncombe County, North Carolina
Frank Gardner Lesure, A. E. Grosz, B. B. Williams, Gertrude C. Gazdik
1978, Open-File Report 78-1091
The Craggy Mountain Wilderness Study Area covers about 550 hectares of the Pisgah National Forest in the Blue Ridge Mountains of western North Carolina (fig. 1). The area is 21 km northeast of Asheville, Buncombe County, N.C., and 11 km southwest of Mount Mitchell, the highest point in eastern North...
Mineral resources of the Cranberry Wilderness Study Area, Pocahontas and Webster counties, West Virginia
Charles R. Meissner Jr., John F. Windolph Jr., Peter C. Mory, Donald K. Harrison, Cornelia Clermont Cameron, Andrew E. Grosz, William J. Perry Jr., Frank Gardner Lesure
1978, Open-File Report 78-142
Cranberry Wilderness Study Area comprises 14,702 ha in the Monongahela National Forest, Pocahontas and Webster Counties, east-central West Virginia. The area is in the Yew Mountains of the Appalachian Plateaus and is at the eastern edge of the central Appalachian coal fields. Cranberry Glades, a peatland of botanical interest lies...
Mineral resources of the Rincon wilderness study area, Pima County, Arizona
Charles H. Thorman, Harald Drewes, Michael Lane
1978, Open-File Report 78-596
The Rincon wilderness study area comprises about 254 km2 (98 mi2) of the Rincon Mountains 15-30 km (10-20 mi) east of Tucson, Arizona. The area lies within the Coronado National Forest and forms a belt around the north, east, and south sides of the Saguaro National Monument (fig. 1). A...
Hydrogeology of the karst of Puerto Rico
Ennio V. Giusti
1978, Professional Paper 1012
About one-fifth of Puerto Rico is covered by a tropical karst formed on a series of six limestone formations ranging in age from middle-Oligocene to middle Miocene. These formations strike east to west and crop out over the north coast of the island. Structurally, the rocks form a simple wedge...
Placer gold deposits in the Mahd adh Dhahab district, Kingdom of Saudi Arabia
Abdulaziz Y. Bagdady, Jesse William Whitlow, Ralph Jackson Roberts
1978, Open-File Report 78-1074
Placer gold deposits in the Mahd adh Dhahab district were productive during ancient times, possibly during two periods, about 950 B.C. and 750— 1258 A.D. These deposits were mapped and systematically sampled in 1973 to determine their future potential. The sampling program was facilitated by use of a backhoe which...
Water-quality assessment of the Middle Fork Anderson River watershed, Crawford and Perry counties, Indiana
Mark A. Ayers
1978, Open-File Report 78-71
Surface-water quality in the watershed is generally good except for problem-causing concentrations of bacteria, dissolved oxygen, and phosphorus at some sites along the main stem during low flow and manganese at most sites year-round.Dissolved-solids concentration ranged from 76 to 248 milligrams per liter. Concentrations at sites upstream from reservoirs were...
Geochemical explorations for gold deposits at Goldfield, Nevada
Roger P. Ashley, William J. Keith
1978, Open-File Report 78-228
The main problem in geochemical exploration for gold ore bodies in the 40 km2 hydrothermally altered area at Goldfield is to decide which of the many silicified ledges exposed are most likely to yield deposits with additional subsurface exploration. We conclude that the most efficient way to search for exploration...