Deformation along the northeast side of Blacktail Mountains salient, southwestern Montana
Russell G. Tysdal
1988, GSA Memoirs (171) 203-215
The Blacktail Mountains salient is a convex-eastward area of stacked Laramide-age thrust faults that trend north and dip west at moderate angles. The thrusts occur in Mississippian to Cretaceous strata above a basement of Archean metamorphic rocks. The northern margin of the salient is delimited by the Jake Canyon fault,...
A paleomagnetic investigation of rocks from the Ohio Range and the Dry Valleys, Transantarctic Mountains, Antarctica
Karl S. Kellogg
1988, New Zealand Journal of Geology and Geophysics (31) 77-85
Two well-defined virtual geomagnetic poles (VGPs) for East Antarctica were obtained from the Middle Jurassic Ferrar Dolerite, sampled from a thick sill on Mt Schopf in the Ohio Range, and from a horizontal sheet intruding Paleozoic granitic rocks at Mt Cerberus in the Dry Valleys. The VGP from the sill...
Pyrite formation in the Lower Cretaceous Mowry Shale: Effect of organic matter type and reactive iron content
Hugh R. Davis, Charles W. Byers, Walter E. Dean
1988, American Journal of Science (288) 873-890
Geochemical analysis of the Lower Cretaceous Mowry Shale in Wyoming and Montana shows that organic matter type and reactive iron content limited pyrite formation during early diagenesis. Consequently, direct interpretation of paleosalinity cannot be made from a carbon/sulfur plot. Mowry Shale samples with hydrogen index (HI) less than 150 (mg...
Direct-current resistivity data from 94 sites in northeastern Palm Beach County, Florida
Cathleen J. Peterson
1988, Open-File Report 88-464
Direct-current resistivity data were collected from 94 vertical electric sounding profiles in northeastern Palm Beach County, Florida. Direct-current resistivity data, which may be used to determine the location and thicknesses of shallow, semipermeable marls or locate zones of high chloride concentration, are presented in this report. The resistivity data consist...
Geologic map of the Yellow Hills West Quadrangle, Washoe County, Nevada
J. A. Ach
1988, Miscellaneous Field Studies Map 2028
This 1988 geologic map of the Yellow Hills West quadrangle, Washoe County, Nevada was produced through mapping work conducted in 1985 and 1986....
Water withdrawals, use, and trends in Florida, 1985
Richard L. Marella
1988, Water-Resources Investigations Report 88-4103
Total water withdrawn for use in Florida for 1985, in million gal/day, was 17,057 of which 6,259, or nearly 37%, was freshwater and 10,798 was saline. The majority of freshwater withdrawn was groundwater (64%) and the majority of saline water withdrawn was surface water (99%). Thermoelectric power generation accounted for...
Effects of two stormwater management methods on the quality of water in the upper Biscayne aquifer at two commercial areas in Dade County, Florida
Donald J. McKenzie, G. A. Irwin
1988, Water-Resources Investigations Report 88-4069
This study is part of a continued effort to assess the effects of urban stormwater recharge on the water quality of the Biscayne aquifer in southeast Florida. In this report, the water-quality effects on shallow ground water resulting from stormwater disposal by exfiltration trench and grassy swale were investigated at...
Ground-water flow beneath levee 35A from conservation area 2B, Broward County, Florida
Leo J. Swayze
1988, Water-Resources Investigations Report 87-4280
Conservation Area 2B is an area of recharge for the surficial aquifer system in Broward County. Water stored in the conservation area provides the hydraulic potential for downward flow to the high permeability zone of the Biscayne aquifer. A 5.64 ft head differential (average for the period of record) between...
Major highways: 1987
Water Resources Division, U.S. Geological Survey
1988, Report, National atlas of the United States
No abstract available....
Assessment of the role of bottomland hardwoods in sediment and erosion control
A. Molinas, Gregor T. Auble, C.A. Segelquist, Lee S. Ischinger
1988, Report
Drainage and clearing of bottomland hardwoods have long been recognized by the U.S. Environmental Protection Agency (EPA) and the U.S. Fish and Wildlife Service (Service) as important impacts of Federal water projects in the lower Mississippi River Valley. More recently, the water quality impacts of such projects (e.g., increases in...
Geologic map of Kentucky
Martin C. Noger
1988, Report
No abstract available....
Numerical analysis of Landsat Thematic Mapper images of Antarctica
Olav Orheim, Baerbel K. Lucchitta
1988, Annals of Glaciology (11) 109-120
Landsat-5 Thematic Mapper (TM) data from Dronning [Queen] Maud Land, Antarctica, have been analysed to provide insights into physical properties of the ice sheet. Brightness (at-satellite) temperatures calculated from digital numbers of the thermal band (TM band 6), using state-of-the-art equations and constants (Markham and Barker 1986), are...
Landslide processes in Utah: observation and theory
1988, Bulletin 1842
No abstract available....
Coal map of North America
Gordon H. Wood Jr., William V. Bour III
1988, Report
No abstract available....
The Mount Mazama climactic eruption (6900 BP) and resulting convulsive sedimentation on the continent, ocean basin, and Crater Lake caldera floor
C. Hans Nelson, Paul R. Carlson, Charles R. Bacon
1988, Book chapter, Sedimentologic consequences of convulsive geologic events
The climactic eruption of Mount Mazama and the resulting sedimentation may have been the most significant convulsive sedimentary event in North America during Holocene time. A collapse caldera 1,200 m deep and 10 km in diameter was formed in Mount Mazama, and its floor was covered by hundreds of meters...
Geology and resources of gold in the United States
Daniel R. Shawe, Roger P. Ashley, Lorna M.H. Carter
1988, Bulletin 1857
No abstract available....
Evolution of sedimentary basins: San Juan Basin
1988, Bulletin 1808
No abstract available....
Mg/Mn partitioning as a test for equilibrium between coexisting Fe-Ti oxides
Charles R. Bacon, M.M. Hirschmann
1988, American Mineralogist (73) 57-61
Partitioning of Mg and Mn between titanomagnetite and ferrian ilmenite of volcanic rocks provides a test for equilibrium between coexisting phases. A plot of log(Mg/Mn)-, vs. log(Mg/Mn),, for 213 homogeneous oxide pairs from volcanic rocks yields a straight line over more than two orders of magnitude variation in Mg/Mn. Analyses...
The socially optimal and market utilization of ground-water resources
A. J. Douglas
1988, Report, Proceedings of the symposium on water-use data for water resources management
No abstract available....
Western state instream flow programs: a comparative assessment
Matthew J. McKinney, Jonathan G. Taylor
1988, Report, Instream Flow Information Paper
During their early history, Western States water rights laws were primarily means for facilitating and regulating water diversions for offstream, consumptive use. More recently, a countervailing concern for instream values such as fish and wildlife habitat, recreation, aesthetic values, and water quality has emerged in the legislative and administrative handling...
1986 wetland plant list: Hawaii
P.B. Reed Jr.
1988, Report
No abstract available....
Historical changes in the major fish resources of the Great Lakes
Wilbur L. Hartman
Marlene S. Evans, editor(s)
1988, Book chapter, Toxic contaminants and ecosystem health: a Great Lakes focus
My purpose here is to review historic changes in the major fish resources of the five Great Lakes, and to identify the cause or causes for those changes. In some instances it will be clear that intensive fishing was the primary cause of change; in other instances it will be...
Landscape analysis of woody riparian vegetation along a portion of the Cache La Poudre River, CO
Michael L. Scott, G.C. Horak, W.L. Slauson
1988, Book, Restoration, creation, and management of wetland and riparian ecosystems in the American west
No abstract available....
Results of a survey of U.S. Fish and Wildlife Service Endangered Species and Ecological Services Field Offices, Refuges, Hatcheries, and Research Centers
Douglas N. Gladwin, Duane A. Asherin, Karen M. Manci
1988, Report, Effects of aircraft noise and sonic booms on fish and wildlife
The National Ecology Research Center (Center), as part of an ongoing research study on the effects of low altitude aircraft operations on fish and wildlife, conducted a survey in January 1987 of all U.S. Fish and Wildlife Service (Service) regional directors, research center directors, Ecological Services and Endangered Species field...
Thematic mapping from satellite imagery
J. Denegre, editor(s)
1988, Book
This report, produced between 1984 and 1987 in a bilingual edition (English and French), provides a wealth of information on a wide variety of cartographic applications which are being developed to make effective use of new data that is now being collected by Earth observation satellites. At a time when...
