Foraging trade-offs along a predator-permanence gradient in subalpine wetlands
Scott A Wissinger, Howard H. Whiteman, G. B. Sparks, G. L. Rouse, W. S. Brown
1999, Ecology (80) 2102-2116
We conducted a series of field and laboratory experiments to determine the direct and indirect effects of a top predator, the tiger salamander (Ambystoma tigrinum nebulosum), on larvae of two species of limnephilid caddisflies (Limnephilus externus and Asynarchus nigriculus) in subalpine wetlands in central Colorado. Asynarchus larvae predominate in temporary wetlands and are aggressive...
A bibliography of geomorphometry, the quantitative representation of topography; supplement 3.0
R.J. Pike
1999, Open-File Report 99-140
Geologic map of the Seneca quadrangle, Montgomery County, Maryland, and Fairfax and Loudoun Counties, Virginia
Avery Ala Drake, Scott Southworth, K. Y. Lee
1999, Geologic Quadrangle 1802
Revised shaded relief map and controlled color photomosaic of the Ismenius Lacus Quadrangle (MC-5) of Mars
Water Resources Division, U.S. Geological Survey
1999, IMAP 2575
No abstract available....
Geologic map of the Islamabad-Rawalpindi area, Punjab, northern Pakistan
V. S. Williams, M.K. Pasha, I.M. Sheikh
1999, Open-File Report 99-47
Digital data used to relate nutrient inputs to water quality in the Chesapeake Bay watershed
John W. Brakebill, Stephen D. Preston
1999, Open-File Report 99-60
Digital data sets were compiled by the U. S. Geological Survey (USGS) and used as input for a collection of Spatially Referenced Regressions On Watershed attributes for the Chesapeake Bay region. These regressions relate streamwater loads to nutrient sources and the factors that affect the transport of these nutrients throughout...
The difference between the potentiometric surfaces of the upper Patapsco aquifer, September 1990 and September 1997 in southern Maryland
Stephen E. Curtin, David C. Andreasen, Frederick K. Mack
1999, Open-File Report 99-86
No abstract available....
Potentiometric surface of the Aquia aquifer in southern Maryland, September 1997
Stephen E. Curtin, David C. Andreasen, Frederick K. Mack
1999, Open-File Report 99-82
No abstract available....
Biomass of coastal cutthroat trout in unlogged and previously clear-cut basins in the central Coast Range of Oregon
P.J. Connolly, J.D. Hall
1999, Transactions of the American Fisheries Society (128) 890-899
Populations of coastal cutthroat trout Oncorhynchus clarki clarki were sampled in 16 Oregon headwater streams during 1991–1993. These streams were above upstream migration barriers and distributed among basins that had been logged 20–30 and 40–60 years ago and basins that had not been logged but had burned 125–150 years...
Geologic map of the Galaxias quadrangle (MTM 35217) of Mars
Rene A. De Hon, Peter J. Mouginis-Mark, Eugene E. Brick
1999, IMAP 2579
The Galaxias region (MTM 35217) is one of a series of 1:500,000-scale science study areas on Mars sponsored by NASA's Planetary Geology and Geophysics Program. Situated near the northern limit of lava flows associated with Elysium Mons, this region includes a mixture of volcanic and nonvolcanic terrains. The region is...
Influence of externally attached transmitters on the swimming performance of juvenile white sturgeon
T.D. Counihan, C.N. Frost
1999, Transactions of the American Fisheries Society (128) 965-970
We measured the critical swimming speed of juvenile white sturgeons Acipenser transmontanus equipped with externally attached dummy ultrasonic transmitters and of untagged control fish in the laboratory. White sturgeons ranging from 31.9 to 37.0 cm fork length were subjected to one of three treatments: Control (handled but not tagged),...
Geology, hydrology, and results of tracer testing in the Galena-Platteville aquifer at a waste-disposal site near Byron, Illinois
Robert T. Kay, Douglas J. Yeskis, Scott T. Prinos, William S. Morrow, Mark Vendl
1999, Open-File Report 98-640
A study was conducted by the U.S. Geological Survey and the U.S. Environmental Protection Agency of the geohydrology of the dolomite bedrock at a waste-disposal site near Byron, Illinois. The study was designed to identify and characterize the flow pathways through the bedrock aquifer beneath the site. The geologic units...
The contribution of giant fields to United States oil production and reserves
J. W. Schmoker
1999, Open-File Report 99-131
Spatial variation among lakes within landscapes: Ecological organization along lake chains
Patricia A. Soranno, Katherine E. Webster, Joan L. Riera, Timothy K. Kratz, Jill Baron, Paul A. Bukaveckas, George Kling, David S. White, Nel Caine, Richard C Lathrop, Peter R. Leavitt
1999, Ecosystems (2) 395-410
Although limnologists have long been interested in regional patterns in lake attributes, only recently have they considered lakes connected and organized across the landscape, rather than as spatially independent entities. Here we explore the spatial organization of lake districts through the concept of landscape position, a concept that considers lakes...
The Santa Cruz - Tarija Province of Central South America: Los Monos - Machareti(!) Petroleum System
Sandra J. Lindquist
1999, Open-File Report 99-50-C
The Los Monos - Machareti(!) total petroleum system is in the Santa Cruz - Tarija Province of Bolivia, Argentina and Paraguay. Province history is that of a Paleozoic, intracratonic, siliciclastic rift basin that evolved into a Miocene (Andean) foreland fold and thrust belt. Existing fields are typified by alternating reservoir...
The Red Sea Basin Province: Sudr-Nubia(!) and Maqna(!) Petroleum Systems
Sandra J. Lindquist
1999, Open-File Report 99-50-A
The Sudr-Nubia(!) oil-prone total petroleum system dominates the densely explored Gulf of Suez part of the rifted Red Sea Basin Province. Upper Cretaceous to Eocene source rocks, primarily the Senonian Sudr Formation, are organic-rich, areally uniform marine carbonates that have generated known ultimate recoverable reserves exceeding 11 BBOE. The name...
The Timan-Pechora Basin province of northwest Arctic Russia; Domanik, Paleozoic total petroleum system
Sandra J. Lindquist
1999, Open-File Report 99-50-G
The Domanik-Paleozoic oil-prone total petroleum system covers most of the Timan-Pechora Basin Province of northwestern Arctic Russia. It contains nearly 20 BBOE ultimate recoverable reserves (66% oil). West of the province is the early Precambrian Eastern European craton margin. The province itself was the site of periodic Paleozoic tectonic events,...
Surface Water Quality-Assurance Plan, U.S. Geological Survey, Georgia District
T. C. Stamey
1999, Open-File Report 99-71
Study design and analytical results used to evaluate stability of volatile organic compounds in water matrices
Jason T. Love, G.C. Delzer, Sonja R. Abney, John S. Zogorski
1999, Open-File Report 98-637
Workplan for U.S. Geological Survey hydrologic data-collection and support activities on Fort Wainwright, Alaska, 1994-97
David V. Claar, Michael R. Lilly
1999, Open-File Report 99-80
The U.S. Army Alaska is responsible for environmental activities on Fort Wainwright near Fairbanks, Alaska. In order to better meet the needs of environmental investigations, the Army requires geohydrologic information about the Fort Wainwright area. Since 1994, the U.S. Geological Survey has been working in cooperation with the U.S. Army...
Seismic and tsunami hazard in Puerto Rico and the Virgin Islands
William P. Dillon, Arthur D. Frankel, Charles S. Mueller, Rafael W. Rodriguez
Uri S. ten Brink, editor(s)
1999, Open-File Report 99-353
Executive SummaryPuerto Rico and the Virgin Islands are located at an active plate boundary between the North American plate and the northeast corner of the Caribbean plate. The region was subject in historical times to large magnitude earthquakes and devastating tsunamis. A major downward tilt of the sea floor north...
Geology and mineral deposits of the Keweenaw Peninsula and vicinity, Michigan
W.F. Cannon, Michele E. McRae, S. W. Nicholson
1999, Open-File Report 99-149
Method of analysis by the U.S. Geological Survey Organic Geochemistry Research Group: Determination of triazine and chloroacetanilide herbicides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring
L.R. Zimmerman, E.M. Thurman
1999, Open-File Report 98-634
No abstract available....
Geologic map of the Scotts Mills, Silverton, and Stayton Northeast 7.5 minute quadrangles, Northwest Oregon: A digital database
Terry Tolan, Marvin Beeson, Karen L. Wheeler
1999, Open-File Report 99-141
The Scotts Mills, Silverton, and Stayton NE 7.5 minute quadrangles are situated along the eastern margin of the Willamette Valley and adjacent lower foothills (Waldo and Silverton Hills) of the Cascade Range (Fig. 1). The terrain within this area is of low to moderate relief, ranging from 100 to more...
The difference between the potentiometric surfaces of the lower Patapsco Aquifer, September 1990 and September 1997 in southern Maryland
Stephen E. Curtin, David C. Andreasen, Frederick K. Mack
1999, Open-File Report 99-88
No abstract available....
