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...
The Potential for Prophyry Copper-Molybdenum Deposits in the Eastern United States
Robert Gordon Schmidt
1978, Professional Paper 907-E
Several significant porphyry-type deposits of Paleozoic age are known in New England and eastern Canada. Disseminated copper-molybdenum deposits of Paleozoic age are in the Southeastern United States, and copper is produced from porphyry-type deposits of both Precambrian and Paleozoic age in eastern Canada. Although these old deposits are surely less...
Ground-water records for eastern Oklahoma, Part 2; water-quality records for wells, test-holes, and springs
1978, Open-File Report 78-357
The U. S. Geological Survey has collected data on Oklahoma's ground-water resources since 1934. Most of these data were collected as part of specific ground-water studies conducted in cooperation with various Federal, State, and local agencies. Data on construction, yield, water levels, and other physical well parameters are given in...
The hydrothermal system of Long Valley Caldera, California
M.L. Sorey, Robert Edward Lewis, F. H. Olmsted
1978, Professional Paper 1044-A
Long Valley caldera, an elliptical depression covering 450 km 2 on the eastern front of the Sierra Nevada in east-central California, contains a hot-water convection system with numerous hot springs and measured and estimated aquifer temperatures at depths of 180?C to 280?C. In this study we have synthesized the results...
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We report 76 previously unpublished K-Ar mineral ages from 47 metamorphic and igneous rocks in the southwestern Brooks Range.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...
Sediment yields for selected streams in Texas
C.T. Welborn, R. Bryce Bezant
1978, Open-File Report 78-83
The U.S. Geological Survey began a study to determine sediment yields for selected streams in Texas during the 1966 water year to provide information for areas in which sediment-yield data were meager or lacking. These data will aid in delineating problem areas and planning for water-resources development in the State....
Description of wells at Beale Air Force Base and vicinity, California
Gerald L. Rockwell
1978, Open-File Report 78-10
The study area occupies approximately 168 square miles of the Sacramento Valley. The study area boundary is the Yuba River in the north, the Feather River in the west, the Bear River in the south, and the Sierra Nevada foothills in the east. Between December 1976 and March 1977, 640 wells...
Floodflow characteristics of the Arkansas River at East Belt Freeway, in Pulaski County, Arkansas
James Lee Patterson
1978, Open-File Report 78-225
No abstract available. ...
Potential hazards from future eruptions in the vicinity of Mount Shasta Volcano, northern California
C. Dan Miller
1978, Open-File Report 78-827
Mount Shasta has erupted, on the average, at least once per 800 years during the last 10,000 years, and about once per 600 years during the last 4,500 years. The last known eruption occurred about 200 radiocarbon years ago. Eruptions during the last 10,000 years produced lava flows and domes...
Gazetteer of coastal and offshore features of the Gulf of Alaska north of 54° N latitude
Marybeth Gerin, Bruce F. Molnia
1978, Open-File Report 78-208
This gazetteer, the first of three to be released, presents names of seafloor features of the Gulf of Alaska and coastal features north of 54° N latitude between Cross Sound to the east and Unimak Island to the west. Also included are Prince William Sound and Cook Inlet but not...
Pennsylvanian (Upper Carboniferous) system of Wyoming
Edwin K. Maughan
1978, Open-File Report 78-377
Pennsylvanian rocks in Wyoming comprise two stratigraphic sequences bounded by regional unconformities. Red mudstone and limestone characterize the strata in the lower sequence, and sandstone and dolomite characterize the strata in the upper sequence. Initial deposits of the lower sequence are-red mudstone probably of no older age than about middle...
Preliminary aeromagnetic map of the eastern part of southern Alaska
John E. Decker, Susan M. Karl
1978, Open-File Report 77-169-E
No abstract available....
Aeromagnetic map of the eastern part of the Adirondacks Mountains, New York
U.S. Geological Survey
1978, Open-File Report 78-279
No abstract available....
Aeromagnetic form-line contour map of the east part of the Rolla, Missouri 1° x 2° quadrangle
Water Resources Division, U.S. Geological Survey
1978, Open-File Report 78-330
No abstract available....
Map showing depth to water table, September 1976, and area inundated by the June 1975 flood, Helena Valley, Lewis and Clark County, Montana
Kathleen R. Wilke, M. V. Johnson
1978, Open-File Report 78-110
Depth to water table, September 1976, and area inundated by the June 1975 flood in the Helena valley, Montana, are mapped on two sheets, Helena and East Helena 7.5-minute quadrangles, at scale 1:48,000. Depth to water table was mapped using water-level measurements from existing shallow observation wells and selected domestic...
Geochemical map showing the distribution and abundance of copper in stream sediments in the Seward and Blying Sound quadrangles, Alaska
R. B. Tripp, W.D. Crim, E.F. Cooley, G.W. Day
1978, Miscellaneous Field Studies Map 880-E
Reconnaissance geochemical and mineralogical sampling was done in the Seward and Blying Sound quadrangles during 1975 and 1976 as part of the Alaska Mineral Resources Assessment Program (AMRAP). This map shows the distribution and abundance of copper in stream-sediment samples. Stream-sediment samples were collected at 569 sites from active stream channels...
Water-table map of Racine County, Wisconsin
M.G. Sherrill, J.J. Schiller
1978, Water-Resources Investigations Report 79-41
A map (scale 1:100,000) of the water table in Racine County in southeastern Wisconsin was prepared using water levels from more than 250 wells. The work was done as a cooperative project between the U.S. Geological Survey and the Southeastern Wisconsin Regional Planning Commission. The map shows the altitude of...
Water-table map of Walworth County, Wisconsin
Marvin G. Sherrill, John R. Erickson
1978, Water-Resources Investigations Report 79-42
A map of the water table in Walworth County in southeastern Wisconsin was prepared using water levels from nearly 600 wells. The work was done as a cooperative project between the U.S. Geological Survey, the University of Wisconsin-Extension, Geological and Natural History Survey, and the Southeastern Wisconsin Regional Planning Commission....
Geology of the Arco-Big Southern Butte area, eastern Snake River Plain, and potential volcanic hazards to the radioactive waste management complex, and other waste storage and reactor facilities at the Idaho National Engineering Laboratory, Idaho
Mel A. Kuntz, John O. Kork
1978, Open-File Report 78-691
The Arco-Big Southern Butte area of the eastern Snake River Plain, Idaho, includes a volcanic rift zone and more than 70 Holocene and late Quaternary basalt volcanoes. The Arco volcanic rift zone extends southeast for 50 km from Arco to about 10 km southeast of Big Southern Butte. The rift...
Summary appraisals of the nation's ground-water resources – Missouri basin region
O. James Taylor
1978, Professional Paper 813-Q
The Missouri Basin Region lies in the north-central part of the United States and southern Canada. It includes parts of Alberta and Saskatchewan in Canada; parts of Montana, Wyoming, North Dakota, South Dakota, Minnesota, Iowa, Colorado, Kansas, and Missouri, and all of Nebraska in the United States. The region includes...
Summary appraisals of the nation's ground-water resources – Souris-Red-Rainy region
Harold O. Reeder
1978, Professional Paper 813-K
A broad-perspective analysis of the ground-water resources and present and possible future water development and management in the Souris-Red-Rainy Region is presented. The region includes the basins of the Souris River within Montana and North Dakota; the Red River of the North in South Dakota, North Dakota, and Minnesota; and...
Analyses of rock samples from the Hunt Fork Shale and related Upper Devonian rocks, Philip Smith Quadrangle, Arctic Alaska
J. Thomas Dutro, David E. Detra
1978, Open-File Report 78-559
More than 1400 m of fine-grained clastic rocks and reefoid limestones constitute the lower part of an Upper Devonian transgressive-regressive cycle in the central Brooks Range, Alaska (Dutro and others, 1977). The Hunt Fork Shale and an underlying heterogeneous unit (unnamed) were measured and sampled on the east side of...
Hydrologic environment of the Silurian salt deposits in parts of Michigan, Ohio, and New York
Stanley E. Norris
1978, Open-File Report 78-684
The aggregate thickness of evaporites (salt, gypsum, and anhydrite) in the Silurian Salina sequence in Michigan exceeds 1200 feet in areas near the periphery of the Michigan basin, where the salt beds are less than 3000 feet below land surface. In northeast Ohio the aggregate thickness of salt beds is...
Ground-water quality near the northwest 58th Street solid-waste disposal facility, Dade County, Florida
H. C. Mattraw Jr., John E. Hull, Howard Klein
1978, Water-Resources Investigations Report 78-45
The Northwest 58th Street solid-waste disposal facility, 3 miles west of a major Dade County municipal water-supply well field, overlays the Biscayne aquifer, a permeable, solution-riddled limestone which transmits leachates eastward at a calculated rate of 2.9 feet per day. A discrete, identifiable leachate plume has been recognized under and...
Water resources data for Washington, water year 1977, Vol. 2 - Eastern Washington
Water Resources Division, U.S. Geological Survey
1978, Water Data Report WA-77-2
Water resources data for the 1977 water year for Washington consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water-quality of ground water. This report, in two volumes, contains discharge records for 258 gaging stations;...
