Could Mars be dark and altered?
Wendy M. Calvin
1998, Geophysical Research Letters (25) 1597-1600
There is a long known dichotomy in the martian albedo, with an associated, but mostly assumed, mineralogical split as well. The bright red regions are inferred to be weathered, oxidized dust and the dark grey regions unaltered volcanic material. A number of recent analyses suggest this division is...
Influence of subglacial geology on the onset of a West Antarctic ice stream from aerogeophysical observations
R. E. Bell, D. D. Blankenship, Carol A. Finn, D. L. Morse, T. A. Scambos, J. M. Brozena, S. M. Hodge
1998, Nature (394) 58-62
Marine ice-sheet collapse can contribute to rapid sea-level rise. Today, the West Antarctic Ice Sheet contains an amount of ice equivalent to approximately six metres of sea-level rise, but most of the ice is in the slowly moving interior reservoir. A relatively small fraction of the ice sheet comprises several...
The influence of extraction procedure on ion concentrations in sediment pore water
P. V. Winger, P. J. Lasier, B. P. Jackson
1998, Archives of Environmental Contamination and Toxicology (35) 8-13
Sediment pore water has the potential to yield important information on sediment quality, but the influence of isolation procedures on the chemistry and toxicity are not completely known and consensus on methods used for the isolation from sediment has not been reached. To provide additional insight into the influence of...
Environmental management technical center strategic plan with implementation objectives for the period 1998-2002
U.S. Environmental Management Technical Center
1998, Report
No abstract available....
Sand dunes; computer animations and paper models
T. R. Alpha, J. P. Galloway, S. W. Starratt
1998, Open-File Report 98-131-A
Generic names of northern and southern fur seals (Mammalia: Otariidae)
Alfred L. Gardner, C. Brian Robbins
1998, Marine Mammal Science (14) 544-551
We have resolved a nomenclatural problem discovered during research on the northern fur seal that concerns the correct generic name for this taxon and for fur seals of the Southern Hemisphere. The unfortunate practice by some 19th-century authors to use names in their Latinized form but to date them from...
Geologic map of Pavonis Mons Volcano, Mars
David H. Scott, James M. Dohm, James R. Zimbelman
1998, IMAP 2561
The geologic map shows lava flows and fan-shaped deposits on Pavonis Mons, the central of three large shield volcanoes (Arsia, Pavonis, and Ascraeus Montes) that form...
Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor off Milford, Connecticut
D.C. Twichell, R.N. Zajac, L.J. Poppe, R. S. Lewis, V.A. Cross, D.R. Nichols, M. L. DiGiacomo-Cohen
1998, IMAP 2632
Geologic map of the Kensington quadrangle, Montgomery County, Maryland
Avery Ala Drake
1998, Geologic Quadrangle 1774
Hydrogeologic and water-quality data, Upper Sioux Indian Community, southwestern Minnesota, 1994-96
Michael L. Strobel, L.M. Pottenger
1998, Open-File Report 97-827
This report presents data on hydrogeology and water quality at the Upper Sioux Indian Community, located along the Minnesota River in southwestern Minnesota. Data were collected during 1994-96 by the U.S. Geological Survey in cooperation with the Upper Sioux Indian Community. The data will serve as a reference to monitor...
Quality of ground water used for selected municipal water supplies in Iowa, 1982-96 water years
B.D. Schaap, S. M. Linhart
1998, Open-File Report 98-3
The Iowa ground-water-quality monitoring program has been conducted cooperatively since 1982 by the Iowa Department of Natural Resources, Geological Survey Bureau; the University of Iowa Hygienic Laboratory, and the U.S. Geological Survey. The original objectives of the program were to provide baseline ground-waterquality data throughout the State for the major...
The Loma Prieta, California, Earthquake of October 17, 1989: Forecasts
Ruth A. Harris
1998, Professional Paper 1550-B
The magnitude (Mw) 6.9 Loma Prieta earthquake struck the San Francisco Bay region of central California at 5:04 p.m. P.d.t. on October 17, 1989, killing 62 people and generating billions of dollars in property damage. Scientists were not surprised by the occurrence of a destructive earthquake in this region and...
Report on the 1997 activity of Shrub mud volcano, Wrangell-St. Elias National Park and Preserve, southcentral Alaska
D.H. Richter, R.B. Symonds, D. S. Rosenkrans, R. G. McGimsey, William C. Evans, R.J. Poreda
1998, Open-File Report 98-128
Use of air temperature data to anticipate the onset of snowmelt-season landslides
Alan F. Chleborad
1998, Open-File Report 98-124
Geology for a changing world; a science strategy for the Geologic Division of the U.S. Geological Survey, 2000-2010
Steven R. Bohlen, Robert B. Halley, Stephen H. Hickman, Samuel Y. Johnson, Jacob B. Lowenstern, Daniel R. Muhs, Geoffrey S. Plumlee, George A. Thompson, David L. Trauger, Mary Lou Zoback
1998, Circular 1172
This report describes seven science goals conceived to address pressing issues facing the Nation in the next decade. These goals focus on understanding human interaction with the natural environment and build upon long-term USGS investments in basic research....
Ground-water levels, predevelopment ground-water flow, and stream-aquifer relations in the vicinity of the Savannah River Site, Georgia and South Carolina
John S. Clarke, Christopher T. West
1998, Water-Resources Investigations Report 97-4197
Ground-water levels, predevelopment ground-water flow, and stream-aquifer relations in the vicinity of the U.S. Department of Energy Savannah River Site, Georgia and South Carolina, were evaluated as part of a cooperative study between the U.S. Geological Survey, U.S. Department of Energy, and Georgia Department of Natural Resources. As part of...
Fuel bed characteristics of Sierra Nevada conifers
J. W. van Wagtendonk, J.M. Benedict, W.M. Sydoriak
1998, Western Journal of Applied Forestry (13) 73-84
A study of fuels in Sierra Nevada conifer forests showed that fuel bed depth and fuel bed weight significantly varied by tree species and developmental stage of the overstory. Specific values for depth and weight of woody, litter, and duff fuels are reported. There was a significant positive relationship between...
Recharge rates to the upper Floridan Aquifer in the Suwannee River Water Management District, Florida
J. W. Grubbs
1998, Water-Resources Investigations Report 97-4283
International strategic mineral issues summary report– Tungsten
Antony B. T. Werner, W. David Sinclair, Earle B. Amey
1998, Circular 930-O
Scheelite and wolframite are the principal minerals currently mined for tungsten. Both occur in hard-rock deposits; wolframite is also recovered from placer deposits. Most current mine production of tungsten is from vein/stockwork, skarn, porphyry, and strata-bound deposits. Minor amounts are produced from disseminated, pegmatite, breccia, and placer deposits. Most tungsten is...
Hydrogeologic and water-quality data, Lower Sioux Indian Community, southwestern Minnesota, 1995-97
M.L. Strobel, L.M. Pottenger
1998, Open-File Report 97-826
This report presents hydrogeologic and water-quality data for the Lower Sioux Indian Community during 1995-97, collected by the U.S. Geological Survey in cooperation with the Lower Sioux Indian Community. The data collected include: (1) water levels, temperature, and dissolved oxygen of Larson Lake, including a vertical profile of temperature and...
Water levels in the Yucca Mountain area, Nevada, 1995
R. P. Graves, R. L. Goemaat
1998, Open-File Report 97-101
Approximate location of the 10,000-milligram-per-liter dissolved-solids boundary in the Silurian and Devonian carbonate-rock aquifer, southwestern and northern Indiana
Douglas J. Schnoebelen, E. F. Bugliosi, R. H. Hanover, J.A. Rupp
1998, Water-Resources Investigations Report 95-4071
Defining the southwestern end of the Blytheville Arch, northeastern Arkansas: Delimiting a seismic source zone in the New Madrid region
Anthony J. Crone
1998, Seismological Research Letters (69) 350-358
Vibroseis seismic-reflection profiles around the southwestern end of the Blytheville arch document the southwesternly extent of the arch and refine the length of a fault zone that coincides with the arch. The 74.3 km of newly interpreted profiles and previously described profiles form a network of lines across and around...
Hydrology and geochemistry of a slag-affected aquifer and chemical characteristics of slag-affected ground water, northwestern Indiana and northeastern Illinois
E. Randall Bayless, Theodore K. Greeman, C.C. Harvey
1998, Water-Resources Investigations Report 97-4198
Slag is a by-product of steel manufacturing and a ubiquitous fill material in northwestern Indiana. Ground water associated with slag deposits generally is characterized by high pH and elevated concentrations of many inorganic water-quality constituents. The U.S. Geological Survey, in cooperation with the Indiana Department of Environmental Management, conducted a...
Proposed expansion of the City of Albuquerque/U.S. Geological Survey ground-water-level monitoring network for the middle Rio Grande Basin, New Mexico
L. M. Bexfield
1998, Open-File Report 97-787
The Middle Rio Grande Basin in central New Mexico, extending from Cochiti Lake on the north to San Acacia on the south, covers an area of about 3,060 square miles. Ground-water withdrawals in the basin are concentrated in and around the city of Albuquerque. Because of rapid increases in population...
