Decade-scale trend in sea water salinity revealed through d18O analysis of Montastraea annularis annual growth bands
Robert B. Halley, Peter K. Swart, Richard E. Dodge, J. Harold Hudson
1994, Bulletin of Marine Science (54) 670-678
Stable oxygen isotope ratios (1)180) of coral skeletons are influenced by ambient water temperature and by the oxygen isotope ratio in the surrounding sea water, which, in turn, is linked to evaporation (salinity) and precipitation. To investigate this relationship more thoroughly, we collected hourly temperature data from the Hen and...
Tonsteins and clay-rich layers in coal-bearing intervals of the Eocene Manning formation, east-central Texas
Leslie F. Ruppert, Peter D. Warwick, Sharon S. Crowley, James Pontolillo
1994, Gulf Coast Association of Geological Societies Transactions (44) 649-656
Six samples from clay-rich intervals in the coal-bearing upper part of the Eocene Manning Formation were analyzed by scanning-electron microscopy and energy-dispersive X-ray fluorescence to determine the origin of minerals in the samples. Two samples were from surface-mine exposures of the 3500 coal bed near Bryan, Texas, and the remaining...
Seismic images of a tectonic subdivision of the Greenville Orogen beneath lakes Ontario and Erie
D. A. Forsyth, Bernd Milkereit, A. Davidson, S. Hanmer, Deborah R. Hutchinson, W. J. Hinze, R.F. Mereu
1994, Canadian Journal of Earth Sciences (31) 229-242
New seismic data from marine air-gun and Vibroseis profiles in Lake Ontario and Lake Erie provide images of subhorizontal Phanerozoic sediments underlain by a remarkable series of easterly dipping reflections that extends from the crystalline basement to the lower crust. These reflections are interpreted as structural features of crustal-scale subdivisions...
Lake-level history of Lake Michigan for the past 12,000 years: the record from deep lacustrine sediments
Steven M. Colman, Richard M. Forester, Richard L. Reynolds, Donald S. Sweetkind, John W. King, Paul Gangemi, Glenn A. Jones, Loyd D. Keigwin, David S. Foster
1994, Journal of Great Lakes Research (20) 73-92
Collection and analysis of an extensive set of seismic-reflection profiles and cores from southern Lake Michigan have provided new data that document the history of the lake basin for the past 12,000 years. Analyses of the seismic data, together with radiocarbon dating, magnetic, sedimentologic, isotopic, and paleontologic studies of...
Water resources data, Oregon, water year 1993
L.E. Hubbard, T.A. Herrett, R.L. Kraus, G.P. Ruppert, M.L. Courts
1994, Water Data Report OR-93-1
No abstract available....
Hydrologic time and sustainability of shallow aquifers
William Back
1994, Conference Paper, Proceedings of the Water down under 1994 conference
Measurement of water and short intervals of time are coeval events that began about 6000 BC in Mesopotamia. Even though time and hydrology have been intimately entwined, with time terms in the denominator of many hydrologic parameters, hydrology's a priori claim to time has not been consummated. Moreover, time takes...
Volume of magma accumulation or withdrawal estimated from surface uplift or subsidence, with application to the 1960 collapse of Kilauea volcano
P.T. Delaney, D.F. McTigue
1994, Bulletin of Volcanology (56) 417-424
An elastic point source model proposed by Mogi for magma chamber inflation and deflation has been applied to geodetic data collected at many volcanoes. The volume of ground surface uplift or subsidence estimated from this model is closely related to the volume of magma injection into or withdrawal from the...
USGS research on mineral resources, 1994; Part A, Program and abstracts
Lorna M.H. Carter, Margo I. Toth, Warren C. Day, editor(s)
1994, Circular 1103-A
No abstract available....
Digital Raster Graphics Fact Sheet
Water Resources Division, U.S. Geological Survey
1994, Fact Sheet 059-94
1:2,000,000-scale Counties of the United States
K.J. Lanfear
1994, Report
This coverage is of the county boundaries of the conterminous United States. It was derived from the Digital Line Graph (DLG) files representing the 1:2,000,000-scale map in the National Atlas of the United States....
Granitic rocks in the Triassic-Jurassic magmatic arc of western Nevada and eastern California
D. A. John, R.A. Schweickert, A.C. Robinson
1994, Open-File Report 94-148
USGS research on mineral resources, 1994: Part B, Guide book for field trips
D. E. Lane
C.H. Thorman, editor(s)
1994, Circular 1103-B
No abstract available....
Regional Aquifer-System Analysis Program of the U.S. Geological Survey, 1978-1992
Ren Jen Sun, Richard H. Johnston
1994, Circular 1099
The major ground-water systems of the United States have been investigated by the U.S. Geological Survey (USGS) through its Regional Aquifer-System Analysis (RASA) Program. During the first 15 years of the program (1978-92), 25 regional aquifer systems, including the most heavily pumped aquifers in the Nation, were intensively studied. As...
Water-resources activities of the U.S. Geological Survey in Kansas; fiscal years 1992 and 1993, and plans for fiscal year 1994
K. A. Powell (compiler)
1994, Open-File Report 94-89
Chick movements and adoption in a colony of Black-Legged Kittiwakes
Bay D. Roberts, Scott A. Hatch
1994, The Wilson Bulletin (106) 289-298
We studied Black-legged Kittiwakes (Rissa tridactyla) in an Alaskan colony where movement of young among nests was possible because of moderate terrain and close nest spacing. Thirty-three percent of chicks in a focal group departed their nests prior to fledging, and seven of the vagrant chicks (58%) were adopted by...
Simple Bouguer gravity anomaly maps of the Venezuelan Guayana Shield, Southeast Venezuela
Kevin R. Bond, J. C. Wynn
1994, Open-File Report 94-165
Hydrocarbon residues in sea otter tissues
Daniel M. Mulcahy, Brenda E. Ballachey
Thomas R. Loughlin, editor(s)
1994, Book chapter, Marine mammals and the <i>Exxon Valdez</i>
On 24 March 1989, the T/V Exxon Valdez ran aground in Prince William Sound (PWS). eventually releasing 11 million gallons of Prudhoe Bay crude oil. The subsequent oil slick extended from PWS southwest along the Kenai Peninsula, past Kodiak Island to the Alaska Peninsula (Galt and Payton 1990). The spill...
Spatial Data Transfer Standard (SDTS)
Water Resources Division, U.S. Geological Survey
1994, Fact Sheet 043-94
Batch experiments characterizing the reduction of chromium(VI) using suboxic material from a mildly reducing sand and gravel aquifer
Linda Davis Anderson, Douglas B. Kent, James A. Davis
1994, Environmental Science & Technology (28) 178-185
Batch experiments were conducted with sand collected from a shallow sand and gravel aquifer to identify the principal chemical reactions influencing the reduction of Cr(VI), so that field-observed Cr(V1) reduction could be described. The reduction appeared to be heterogeneous and occurred primarily on Fe(I1)-bearing minerals. At only 1 wt %...
Prehistoric Alaska: The land
Frederic H. Wilson, Florence R. Weber
Penny Rennick, editor(s)
1994, Alaska Geographic (21) 6-23
Many Alaskans know the dynamic nature of Alaska’s landscape firsthand. The 1964 earthquake, the 1989 eruption of Mount Redoubt volcano, the frequent earthquakes in the Aleutians and the ever-shifting meanders of the Yukon and Kuskokwim rivers remind them of constant changes to the land. These changes are part of the...
United States Geological Survey, programs in Texas
Water Resources Division, U.S. Geological Survey
1994, Fact Sheet 043-95
Meteorologic and physiographic factors in parts of Texas combine to produce some of the most intense rainstorms in the Nation; these rainstorms cause severe, destructive floods somewhere in the State almost every year. A recent example is the catastrophic flooding in the Houston area in October 1994 that resulted in...
Local energy flux estimates for unstable conditions using variance data in semiarid rangelands
William P. Kustas, J.H. Blanford, D.I. Stannard, C.S.T. Daughtry, W. D. Nichols, M.A. Weltz
1994, Water Resources Research (30) 1351-1361
A network of meteorological stations was installed during the Monsoon '90 field campaign in the Walnut Gulch experimental watershed. The study area has a fairly complex surface. The vegetation cover is heterogeneous and sparse, and the terrain is mildly hilly, but dissected by ephemeral channels. Besides measurement of some of...
Geology of northern Alaska
Thomas E. Moore, Wes K. Wallace, Kenneth J. Bird, Susan M. Karl, Charles G. Mull, John T. Dillon
George Plafker, Henry C. Berg, editor(s)
1994, Book chapter, The geology of Alaska
No abstract available....
Membrane-micelle model for humus in soils and sediments and its relation to humification
Robert L. Wershaw
1994, Water Supply Paper 2410
Humification, the process whereby biomass consisting of dead plant and animal remains is converted into soil organic matter (humus), is one of the basic processes of the carbon cycle. The organic compounds that make up plant and animal tissue are thermodynamically unstable in the oxidizing atmosphere at the surface of...
Geohydrology and simulated ground-water flow in an irrigated area of northwestern Indiana
L. D. Arihood, M.E. Basch
1994, Water-Resources Investigations Report 92-4046
Water for irrigation in parts of Newton and Jasper Counties and adjacent areas of northwestern Indiana is pumped mostly from the carbonate- bedrock aquifer that underlies glacial drift. To help in managing the ground-water resources of the area, a three-dimensional ground-water model was developed and tested with hydrologic data collected...
