Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

184937 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 3471, results 86751 - 86775

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Antarctic ice sheet; computer animations and paper model
Tau Rho Alpha, Alan K. Cooper
1998, Open-File Report 98-353-A
This report illustrates, through computer animation and a paper model, why there are changes on the ice sheet that covers the Antarctica continent. By studying the animations and the paper model, students will better understand the evolution of the Antarctic ice sheet. Included in the paper and diskette versions of this...
Effect of restrictive harvest regulations on survival and recovery rates of American black ducks
Charles M. Francis, John R. Sauer, Jerome R. Serie
1998, Journal of Wildlife Management (62) 1544-1557
Population management of waterfowl requires an understanding of the effects of changes in hunting regulations on harvest and survival rates. Mean survival and recovery rates of American black ducks (Anas rubripes) were estimated during 3 periods of increasingly restrictive harvest regulations: 1950-66, 1967-82, and 1983-93. From the first to the...
An enthusiast's guide to agrostology
David A. Pyke
1998, Trends in Plant Science (3) 406-407
Book review of: Population Biology of Grassesedited by G.P. CheplickCambridge University Press, 1998. £50.00/$85.00 hbk (xii +399 pages) ISBN 0 521 57205 3...
Surface-water quality at fixed sites in the Western Lake Michigan Drainages, Wisconsin and Michigan, and the effects of natural and human factors, 1993-95
K.D. Richards, D. J. Sullivan, J.S. Stewart
1998, Water-Resources Investigations Report 97-4208
Streamwater samples were collected from April 1993 through July 1995 at 11 fixed sites in the Western Lake Michigan Drainages Study Unit of the U.S. Geological Survey's National Water-Quality Assessment Program. Water samples were collected monthly at all Fixed Sites, and an additional two to four samples were collected each...
Magnitude and frequency of floods in Washington
S. S. Sumioka, D. L. Kresch, K.D. Kasnick
1998, Water-Resources Investigations Report 97-4277
Annual maximum instantaneous discharge data for 527 gaging stations with at least 10 years of peak-discharge record on unregulated streams were used to compute the magnitude and frequency of floods on Washington streams. Flood magnitudes having exceedance probabilities of 0.5, 0.1, 0.04, 0.02, and 0.01 were related to physical and...
Optimization of ground-water withdrawal in the lower Fox River communities, Wisconsin
J.F. Walker, D. A. Saad, J. T. Krohelski
1998, Water-Resources Investigations Report 97-4218
Pumping from closely spaced wells in the Central Brown County area and the Fox Cities area near the north shore of Lake Winnebago has resulted in the formation of deep cones of depression in the vicinity of the two pumping centers. Water-level measurements indicate there has been a steady decline...
Landslide Hazards in Glacial Lake Clays - Tully Valley, New York
Gerald F. Wieczorek, Dawit Negussey, William M. Kappel
1998, Fact Sheet 013-98
At approximately midday on April 27, 1993, a large landslide occurred along the foot of Bare Mountain in LaFayette, Onondaga County, New York, about 12 miles south of Syracuse (figs. 1, 2). The slide moved rapidly east toward the middle of the Tully Valley and impacted approximately 50 acres of...
Wide-angle seismic constraints on the evolution of the deep San Andreas plate boundary by Mendocino triple junction migration
J.A. Hole, B. C. Beaudoin, T.J. Henstock
1998, Tectonics (17) 802-818
Recent, wide-angle seismic observations that constrain the existence and structure of a mafic layer in the lower crust place strong constraints on the evolution of the San Andreas plate boundary system in northern and central California. Northward migration of the Mendocino Triple Junction and the subducted Juan de Fuca lithospheric...
Geochemical studies of rare earth elements in the Portuguese pyrite belt, and geologic and geochemical controls on gold distribution
David J. Grimes, Robert L. Earhart, Delfim de Carvalho, Vitor Oliveira, Jose T. Oliveira, Paulo Castro
1998, Professional Paper 1596
This report describes geochemical and geological studies which were conducted by the U.S. Geological Survey (USGS) and the Servicos Geologicos de Portugal (SPG) in the Portuguese pyrite belt (PPB) in southern Portugal. The studies included rare earth element (REE) distributions and geological and geochemical controls on the distribution of gold....