Characterization of Ground-Water Quality, Upper Republican Natural Resources District, Nebraska, 1998-2001
Jill D. Frankforter, Daniele T. Chafin
2004, Scientific Investigations Report 2004-5013
Nearly all rural inhabitants and livestock in the Upper Republican Natural Resources District (URNRD) in southwestern Nebraska use ground water that can be affected by elevated nitrate concentrations. The development of ground-water irrigation in this area has increased the vulnerability of ground water to the introduction of fertilizers and other...
Topographic Map of the Southwest Ascraeus Mons Region of Mars - MTM 500k 10/252E OMKT
Water Resources Division, U.S. Geological Survey
2004, IMAP 2798
This map is part of a series of topographic maps of areas of special scientific interest on Mars. The topography was compiled photogrammetically using Viking Orbiter stereo image pairs. The contour interval is 250 meters. Horizontal and vertical control was established using the USGS Mars Digital Image Model 2.0 (MDIM...
Surficial geologic map of the southwest Memphis Quadrangle, Shelby County, Tennessee, and Crittenden County, Arkansas
David W. Moore, Sharon F. Diehl
2004, Scientific Investigations Map 2823
This map is one of seven 1:24,000-scale (7.5-minute) quadrangle maps of the surficial geology of the Memphis, Tennessee, area--part of a series of urban hazard maps. Wind-deposited silt and clayey silt (loess) is the predominant surficial deposit...
Biosolids, Soil, Crop, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2000
Tracy J.B. Yager, David B. Smith, James G. Crock, Michael R. Stevens
2004, Open-File Report 2003-400
In January 1999, the U.S. Geological Survey began an expanded monitoring program near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District and the North Kiowa Bijou Groundwater Management District. Monitoring components were biosolids, soils, crops, ground water, and streambed sediments. The monitoring program addresses concerns from the public...
Summary and Synthesis of Mercury Studies in the Cache Creek Watershed, California, 2000-01
Joseph L. Domagalski, Darell Slotton, Charles N. Alpers, Thomas H. Suchanek, Ronald Churchill, Nicolas Bloom, Shaun M. Ayers, John Clinkenbeard
2004, Water-Resources Investigations Report 2003-4335
This report summarizes the principal findings of the Cache Creek, California, components of a project funded by the CALFED Bay?Delta Program entitled 'An Assessment of Ecological and Human Health Impacts of Mercury in the Bay?Delta Watershed.' A companion report summarizes the key findings of other components of the project based...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of organochlorine pesticides and polychlorinated biphenyls in bottom and suspended sediment by gas chromatography with electron-capture detection
Mary C. Noriega, Duane S. Wydoski, William T. Foreman
2004, Water-Resources Investigations Report 2003-4293
A method applicable for the determination of 19 organochlorine (OC) pesticides, including total toxaphene as a complex mixture, and 3 polychlorinated biphenyl (PCB) mixtures as Aroclor equivalents--Aroclor 1016/1242, 1254, and 1260--in soil, aquatic bottom sediment, and suspended sediment is described. Method performance data are presented. The solvent system...
Results of Electrical Resistivity Data Collected near the Town of Guernsey, Platte County, Wyoming
Robert R. McDougal, Jared D. Abraham, Robert J. Bisdorf
2004, Open-File Report 2004-1095
As part of a study to investigate subsurface geologic conditions as they relate to ground-water flow in an abandoned landfill near the town of Guernsey, Wyoming, geophysical direct current (DC) resistivity data were collected. Eight vertical resistivity soundings and eight horizontal resistivity profiles were made using single channel and multi-channel...
The National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the U.S. Gulf of Mexico
Tara L. Miller, Robert A. Morton, Asbury H. Sallenger Jr., Laura J. Moore
2004, Open-File Report 2004-1089
Introduction The Coastal and Marine Geology Program of the U.S. Geological Survey has generated a comprehensive database of digital vector shorelines and shoreline change rates for the U.S. Gulf of Mexico. These data, which are presented herein, were compiled as part of the U.S. Geological Survey's National Assessment of Shoreline Change...
Wildfire-related floods and debris flows in Montana in 2000 and 2001
Charles Parrett, Susan H. Cannon, Kenneth L. Pierce
2004, Water-Resources Investigations Report 2003-4319
Chemical analyses of tertiary volcanic rocks, central San Juan caldera complex, southwestern Colorado
Peter W. Lipman
2004, Open-File Report 2004-1194
In conjunction with integrated mapping of the Oligocene central San Juan caldera cluster, southwestern Colorado (USGS I-Map 2799, in press), all modern chemical analyses of volcanic rocks for this area determined in laboratories of the U.S. Geological Survey have been re-evaluated in terms of the stratigraphic sequence as presently understood....
Review of Results and Recommendations from the GCMRC 2000-2003 Remote-Sensing Initiative for Monitoring Environmental Resources Within the Colorado River Ecosystem
Philip A. Davis
2004, Open-File Report 2004-1206
In mid-2000, the Grand Canyon Monitoring and Research Center (GCMRC) began a remote-sensing initiative to evaluate all remote-sensing technologies and methods that had potential for providing improved data (capability) for its various programs that monitor the Colorado River ecosystem (CRE). The primary objective of the initiative was to determine the...
Surficial geologic map of the southeast Memphis Quadrangle, Shelby County, Tennessee
David W. Moore, Sharon F. Diehl
2004, Scientific Investigations Map 2822
The depiction of geology on this map is designed to aid in urban planning and analysis of potential damage in the event of strong earthquake motion. The geologic map by itself does not analyze potential earthquake damage, but is designed to be used...
Hydrologic Effects of the 1988 Galena Fire, Black Hills Area, South Dakota
Daniel G. Driscoll, Janet M. Carter, Donald O. Ohlen
2004, Water-Resources Investigations Report 2003-4323
The Galena Fire burned about 16,788 acres of primarily ponderosa pine forest during July 5-8, 1988, in the Black Hills area of South Dakota. The fire burned primarily within the Grace Coolidge Creek drainage basin and almost entirely within the boundaries of Custer State Park. A U.S. Geological Survey gaging...
Relations among floodplain water levels, instream dissolved-oxygen conditions, and streamflow in the lower Roanoke River, North Carolina, 1997-2001
Jerad D. Bales, Douglas A. Walters
2004, Water-Resources Investigations Report 2003-4295
The lower Roanoke River corridor in North Carolina contains a floodplain of national significance. Data from a network of 1 streamflow-measurement site, 13 river-stage sites, 13 floodplain water-level sites located along 4 transects, and 5 in situ water-quality monitoring sites were used to characterize temporal and spatial variations of floodplain...
Status of water levels in aquifers in the Nacatoch Sand of southwestern and northeastern Arkansas and the Tokio Formation of southwestern Arkansas, 2002
Tony P. Schrader, Rheannon M. Scheiderer
2004, Water-Resources Investigations Report 2003-4284
Aquifers in the Nacatoch Sand and Tokio Formation in southwestern Arkansas and the Nacatoch Sand in northeastern Arkansas are sources of water for industrial, public supply, domestic, and agricultural uses. Potentiometric-surface maps were constructed from water-level measurements made in 60 wells completed in the Nacatoch Sand and 48 wells completed...
The Cottage Lake aeromagnetic lineament: A possible onshore extension of the southern Whidbey Island fault, Washington
Richard J. Blakely, Brian L. Sherrod, Ray E. Wells, Craig S. Weaver, David H. McCormack, Kathy G. Troost, Ralph A. Haugerud
2004, Open-File Report 2004-1204
The northwest-striking southern Whidbey Island fault zone (SWIF) was mapped previously using borehole data and potential-field anomalies on Whidbey Island and marine seismic surveys beneath surrounding waterways. Abrupt subsidence at a coastal marsh on south-central Whidbey Island suggests that the SWIF experienced a MW 6.5 to 7.0 earthquake about 3000...
Potential Effects of Individual Sewage Disposal System Density on Ground-Water Quality in the Fractured-Rock Aquifer in the Vicinity of Bailey, Park County, Colorado, 2001-2002
Daniel L. Brendle
2004, Fact Sheet 2004-3009
The importance of hyporheic sediment respiration in several mid-order Michigan rivers: Comparison between methods in estimates of lotic metabolism
D.G. Uzarski, C. A. Stricker, T.M. Burton, D. K. King, A.D. Steinman
2004, Hydrobiologia (518) 47-57
Metabolism was measured in four Michigan streams, comparing estimates made using a flow-through chamber designed to include the hyporheic zone to a 20 cm depth and a traditional closed chamber that enclosed to a 5 cm depth. Mean levels of gross primary productivity and community respiration were consistently greater in...
Assessment of Undiscovered Oil and Gas Resources of the San Joaquin Basin Province of California, 2003
Water Resources Division, U.S. Geological Survey
2004, Fact Sheet 2004-3043
Complex trophic interactions in kelp forest ecosystems
J. A. Estes, E.M. Danner, D.F. Doak, B. Konar, A.M. Springer, P.D. Steinberg, M. Tim Tinker, T. M. Williams
2004, Bulletin of Marine Science (74) 621-638
The distributions and abundances of species and populations change almost continuously. Understanding the processes responsible is perhaps ecology’s most fundamental challenge. Kelp-forest ecosystems in southwest Alaska have undergone several phase shifts between alga- and herbivore-dominated states in recent decades. Overhunting and recovery of sea otters caused the earlier shifts. Studies...
Compilation of Post Wildfire Runoff-Event Data from the Western United States
Joseph E. Gartner, Erica R. Bigio, Susan H. Cannon
2004, Open-File Report 2004-1085
Evaluation of Water Quality for Two St. Johns River Tributaries Receiving Septic Tank Effluent, Duval County, Florida
Shaun Wicklein
2004, Water-Resources Investigations Report 2003-4299
Tributary streamflow to the St. Johns River in Duval County is thought to be affected by septic tank leachate from residential areas adjacent to these tributaries. Water managers and the city of Jacksonville have committed to infrastructure improvements as part of a management plan to address the impairment of tributary...
Interpretation of the Seattle Uplift, Washington, as a passive-roof duplex
Thomas M. Brocher, Richard J. Blakely, Ray E. Wells
2004, Bulletin of the Seismological Society of America (94) 1379-1401
We interpret seismic lines and a wide variety of other geological and geophysical data to suggest that the Seattle uplift is a passive-roof duplex. A passive-roof duplex is bounded top and bottom by thrust faults with opposite senses of vergence that form a triangle zone at the leading edge of...
Reply to discussion on “Tectonic controls of Mississippi Valley-type lead–zinc mineralization in orogenic forelands”
Dwight Bradley, David L. Leach, David Symons, Poul Emsbo, Wayne R. Premo, George N. Breit, D. F. Sangster
2004, Mineralium Deposita (39) 515-519
Bradley and Leach (2003) focused on the tectonics of a subset of Mississippi Valley-type (MVT) lead–zinc deposits. Age assignments followed those given in a review of MVT deposits worldwide (Leach et al. 2001)—a paper that provoked a discussion by Kesler and Carrigan (2002) and reply by Leach et al. (2002),...
Biogeochemical transformation of Fe minerals in a petroleum-contaminated aquifer
John M. Zachara, Ravi K. Kukkadapu, Paul L. Glassman, Alice Dohnalkova, Jim K. Fredrickson, Todd Anderson
2004, Geochimica et Cosmochimica Acta (68) 1971-1805
The Bemidji aquifer in Minnesota, USA is a well-studied site of subsurface petroleum contamination. The site contains an anoxic groundwater plume where soluble petroleum constituents serve as an energy source for a region of methanogenesis near the source and bacterial Fe(III) reduction further down gradient. Methanogenesis apparently begins when...
