Metals transport in the Sacramento River, California, 1996-1997; Volume 2: Interpretation of metal loads
Charles N. Alpers, Ronald C. Antweiler, Howard E. Taylor, Peter D. Dileanis, Joseph L. Domagalski, editor(s)
2000, Water-Resources Investigations Report 2000-4002
Metals transport in the Sacramento River, northern California, from July 1996 to June 1997 was evaluated in terms of metal loads from samples of water and suspended colloids that were collected on up to six occasions at 13 sites in the Sacramento River Basin. Four of the sampling periods (July,...
Geophysical constraints on the Virgin River Depression, Nevada, Utah, and Arizona
Victoria E. Langenheim, J. M. Glen, R.C. Jachens, G. L. Dixon, T.C. Katzer, R. L. Morin
2000, Open-File Report 2000-407
Gravity and aeromagnetic data provide insights into the subsurface lithology and structure of the Virgin River Depression (VRD) of Nevada, Utah, and Arizona. The gravity data indicate that the Quaternary and Tertiary sedimentary deposits hide a complex pre-Cenozoic surface. A north-northwest-trending basement ridge separates the Mesquite and Mormon basins, as...
Water quality in the eastern Iowa basins, Iowa and Minnesota, 1996-98
Stephen J. Kalkhoff, Kimberlee K. Barnes, Kent Becher, Mark E. Savoca, Douglas J. Schnoebelen, Eric M. Sadorf, Stephen D. Porter, Daniel J. Sullivan
2000, Circular 1210
The water quality in rivers and streams and in selected aquifers in eastern Iowa and part of southern Minnesota is described and illustrated. Major ions, nitrogen and other nutrients, and pesticides and some of their breakdown compounds were analyzed in both surface and ground water. Biological communities that included fish,...
Geologic map of the Christian quadrangle, Alaska
W. P. Brosge, H. N. Reiser
2000, Open-File Report 2000-192
Most of the Christian quadrangle is in the Porcupine Plateau; the northwestern part is in the southern Brooks Range, and the southern quarter is in the Yukon Flats. Outcrops of bedrock are poor or lacking, except in the Brooks Range. Although large valley glaciers have moved through the Porcupine Plateau,...
Hydrogeology and simulation of ground-water flow at the Gettysburg Elevator Plant Superfund Site, Adams County, Pennsylvania
Dennis J. Low, Daniel J. Goode, Dennis W. Risser
2000, Open-File Report 2000-185
Ground water in Triassic-age sedimentary fractured-rock aquifers in the area of Gettysburg, Pa., is used as drinking water and for industrial and commercial supply. In 1983, ground water at the Gettysburg Elevator Plant was found by the Pennsylvania Department of Environmental Resources to be contaminated with trichloroethene, 1,1,1-trichloroethane, and other...
Analytical results and sample locality map for rock, stream-sediment, and soil samples, Northern and Eastern Colorado Desert BLM Resource Area, Imperial, Riverside, and San Bernardino counties, California
Harley D. King, Maurice A. Chaffee
2000, Open-File Report 2000-105-A
In 1996-1998 the U.S. Geological Survey (USGS) conducted a geochemical study of the Bureau of Land Management’s (BLM) 5.5 million-acre Northern and Eastern Colorado Desert Resource Area (usually referred to as the NECD in this report), Imperial, Riverside, and San Bernardino Counties, southeastern California (figure 1). This study was done...
Surficial geologic map of central and southern New Jersey
Wayne L. Newell, David S. Powars, J. P. Owens, S.D. Stanford, Byron D. Stone
2000, IMAP 2540-D
No abstract available....
Abrupt physical and chemical changes during 1992-1999, Anderson Springs, SE Geyser Geothermal Field, California
Cathy J. Janik, Fraser Goff, Stephen R. Walter, Michael L. Sorey, Dale Counce, Elizabeth M. Colvard
2000, Open-File Report 2000-37
The Anderson Springs area is located about 90 miles (145 kilometers) north of San Francisco, California, in the southwestern part of Lake County. The area was first developed in the late 1800s as a health resort, which was active until the 1930s. Patrons drank a variety of cool to hot...
Generalized surficial geologic map of the Denver 1° x 2° quadrangle, Colorado
D. W. Moore, A. W. Straub, M. E. Berry, M. L. Baker, T. R. Brandt
2000, Miscellaneous Field Studies Map 2347
Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Descriptions appear in the pamphlet that accompanies the map. Landslide...
Airborne electromagnetics (EM) as a three-dimensional aquifer-mapping tool
Jeff Wynn, Don Pool, Mark Bultman, Mark E. Gettings, Jean Lemieux
2000, Book, Proceedings Volume, SAGEEP-2000 Conference
The San Pedro River in southeastern Arizona hosts a major migratory bird flyway, and was declared a Riparian Conservation Area by Congress in 1988. Recharge of the adjacent Upper San Pedro Valley aquifer was thought to come primarily from the Huachuca Mountains, but the U. S. Army Garrison of Fort...
Digital geologic map of the Harpers Ferry National Historical Park
Scott Southworth, D. K. Brezinski, Randall C. Orndorff, Kerry M. Lagueux, Peter G. Chirico
2000, Open-File Report 2000-297
No abstract available....
Fire in eastern ecosystems
Dale D. Wade, Brent L. Brock, Patrick H. Brose, James B. Grace, G. A. Hoch, William A. Patterson III
2000, General Technical Report RMRS-GTR-42-4
Prior to Euro-American settlement, fire was a ubiquitous force across most of the Eastern United States. Fire regimes spanned a time-scale from chronic to centuries. Fire severity varied from benign to extreme (fig. 1-2). Today, fire is still a major force on the landscape. In some ecosystems fire stabilizes succession at a particular sere,...
Gypsum-karst collapse in the Black Hills, South Dakota-Wyoming, USA
Jack B. Epstein
2000, Acta Carsologica (29) 103-122
No abstract available....
Kaolinite distribution in Paleocene/Eocene boundary strata of northeastern United States and Pakistan – climatic and stratigraphic implications
Thomas G. Gibson, Laurel M. Bybell, Ellen Thomas, James C. Zachos
2000, GFF (122) 56
No abstract available....
Mapping woody vegetation and eastern red cedar in the Nebraska Sand Hills using AVIRIS
Bruce K. Wylie, David Meyer, Mike Choate, L. Vierling, P. K. Kozak
2000, Conference Paper, AVIRIS Proceedings 2000
No abstract available....
The East Range, northwestern Nevada: A neglected key to the tectonic history of the region
Keith B. Ketner, Bruce R. Wardlaw, Anita G. Harris, John E. Repetski
2000, Book chapter, Geology and ore deposits 2000: The Great Basin and beyond: Geological Society of Nevada symposium proceedings
The East Range occupies a strategic position at the western edge of the exposed western facies terrane near the Paleozoic continental margin. There a Cambrian and Ordovician deep-water sequence including the Preble and Valmy Formations is overlain by middle to upper Paleozoic strata that are assigned to three separate stratigraphic...
Protection of fish spawning habitat for the conservation of warm temperate reef fish fisheries of shelf-edge reefs of Florida
Christopher C. Koenig, Felicia C. Coleman, Churchill B. Grimes, Gary R. Fitzhugh, Kathryn M. Scanlon, Christopher T. Gledhill, Mark Grace
2000, Bulletin of Marine Science (66) 593-616
We mapped and briefly describe the surficial geology of selected examples of shelf-edge reefs (50–120 m deep) of the southeastern United States, which are apparently derived from ancient Pleistocene shorelines and are intermittently distributed throughout the region. These reefs are ecologically significant because they support a diverse array of fish...
Relations among sulfate, metals, sediment, and streamflow data for a stream draining a coal-mined watershed in East-Central Pennsylvania
Charles A. Cravotta III,
2000, Conference Paper, Proceedings of the ICARD 2000
Streamflow and water-quality data for the northern part of Swatara Creek, which drains a 112-km2 area in the Southern Anthracite Field of east-central Pennsylvania, indicate iron, copper, and lead, and to a lesser extent manganese and zinc, are transported with suspended particles during stormflow conditions. During stormflow conditions, concentrations of...
Digital data and geologic map of the Powder Mill Ferry Quadrangle, Shannon and Reynolds counties, Missouri
Robert C. McDowell, Richard W. Harrison, Kerry M. Lagueux
2000, IMAP 2722
The geology of the Powder Mill Ferry 7 1/2-minute quadrangle , Shannon and Reynolds Counties, Missouri was mapped from 1997 through 1998 as part of the Midcontinent Karst Systems and...
Analytical results and sample locality map for rock, stream-sediment, and soil samples, Northern and Eastern Colorado Desert BLM Resource Area, Imperial, Riverside, and San Bernardino Counties, California
Harley D. King, Maurice A. Chaffee
2000, Open-File Report 2000-105-B
In 1996-1998 the U.S. Geological Survey (USGS) conducted a geochemical study of the Bureau of Land Management's (BLM) 5.5 million-acre Northern and Eastern Colorado Desert Resource Area (usually referred to as the NECD in this report), Imperial, Riverside, and San Bernardino Counties, southeastern California (figure 1). This study was done...
Pseudomulceodens: A Mississippian Rostroconch from Mexico
S.A. Quiroz-Barroso, John Pojeta Jr., Francisco Sour-Tovar, Salvador Morales-Soto
2000, Journal of Paleontology (74) 1184-1186
This finding of Pseudomulceodens in Mississippian-age rocks of the Santiago Formation provides the first evidence of the molluscan class Rostroconchia in Mexico. Elsewhere in North American Mississippian rocks the class occurs in Arkansas (Hoare et al., 1982, 1988); Illinois (Weller, 1916); Indiana (Beede, 1906); Iowa (White and Whitfield, 1862); Michigan...
Geohydrology and numerical simulation of groundwater flow in the central Virgin River Basin of Iron and Washington Counties, Utah
V.M. Heilweil, G. W. Freethey, C.D. Wilkowske, Bernard J. Stolp, Dale E. Wilberg
2000, Technical Publication 116
Because rapid growth of communities in Washington and Iron Counties, Utah, is expected to cause an increase in the future demand for water resources, a hydrologic investigation was done to better understand ground-water resources within the central Virgin River basin. This study focused on two of the principal ground-water reservoirs...
Water-quality assessment of the Eastern Iowa Basins: Hydrologic and biologic data, October 1996 through September 1998
Kimberlee K. Akers, Denise L. Montgomery, Daniel E. Christiansen, Mark E. Savoca, Douglas J. Schnoebelen, Kent Becher, Eric M. Sadorf
2000, Open-File Report 2000-67
Hydrologic and biologic data collected from October 1996 through September 1998 in the Eastern Iowa Basins study unit of the U.S. Geological Survey National Water-Quality Assessment Program are presented in this report. Monthly data collected from 12 sites on rivers and streams included measurements of physical properties and determinations of...
Geologic map of the upper Parashant Canyon and vicinity Mohave County, northwestern Arizona
George H. Billingsley, Michelle L. Harr, Jessica L. Wellmeyer
2000, Miscellaneous Field Studies Map 2343
The geologic map of the upper Parashant Canyon area covers part of the Colorado Plateau and several large tributary canyons that make up the western part of Arizona's Grand Canyon. The map is part of a cooperative U.S. Geological Survey and National Park Service project to provide geologic information for...
Preliminary potential-field constraints on the geometry of the San Fernando basin, Southern California
Victoria E. Langenheim, Andrew Griscom, R.C. Jachens, T.G. Hildenbrand
2000, Open-File Report 2000-219
Gravity and magnetic data provide new insights on the structural underpinnings of the San Fernando Basin region, which may be important to ground motion models. Gravity data indicate that a deep basin (>5 km) underlies the northern part of the San Fernando Valley; this deep basin is required to explain...
