Composition of the Rex Chert and associated rocks of the Permian Phosphoria Formation: Soda Springs area, SE Idaho
James R. Hein, Brandie McIntyre, Robert B. Perkins, David Z. Piper, James Evans
2002, Open-File Report 2002-345
This study, one in a series, reports bulk chemical and mineralogical compositions, as well as petrographic and outcrop descriptions of rocks collected from three measured outcrop sections of the Rex Chert member of the Phosphoria Formation in SE Idaho. The three measured sections were chosen from ten outcrops of Rex...
Simulation of ground-water flow and delineation of areas contributing recharge within the Mt. Simon-Hinckley aquifer to well fields in the Prairie Island Indian Community, Minnesota
J. F. Ruhl
2002, Water-Resources Investigations Report 2002-4155
The Prairie Island Indian Community in east-central Minnesota uses ground water from the Mt. Simon-Hinckley aquifer as its source of water supply. Tribal officials implemented a Source Water Protection Program to protect the quality of this water. Areas of contributing recharge were delineated for two community well fields. At well...
Preliminary estimates of spatially distributed net infiltration and recharge for the Death Valley region, Nevada-California
J.A. Hevesi, A. L. Flint, L. E. Flint
2002, Water-Resources Investigations Report 2002-4010
A three-dimensional ground-water flow model has been developed to evaluate the Death Valley regional flow system, which includes ground water beneath the Nevada Test Site. Estimates of spatially distributed net infiltration and recharge are needed to define upper boundary conditions. This study presents a preliminary application of a conceptual and...
Paleoecological insights on fixed tree island development in the Florida Everglades: I. environmental controls
Debra A. Willard, James B. Murray, Charles W. Holmes, Michael S. Korvela, Daniel Mason, William H. Orem, D. Timothy Towles
Fred H. Sklar, A. van der Valk, editor(s)
2002, Book chapter, Tree islands of the Everglades
Palynological and geochemical analyses of sediment cores collected on two tree islands in the Florida Everglades indicate long-term hydrologic and chemical differences between tree islands and surrounding marshes and sloughs. Gumbo Limbo and Nuthouse tree islands are elongate, teardrop-shaped islands in Water Conservation Area 3B. Prior to tree island formation...
Toward a community coastal sediment transport modeling system: the second workshop
Christopher R. Sherwood, Courtney K. Harris, W. Rockwell Geyer, Bradford Butman
2002, Eos, Transactions, American Geophysical Union (83) 604
Models for transport and the long-term fate of particles in coastal waters are essential for a variety of applications related to commerce, defense, public health, and the quality of the marine environment. Examples include: analysis of waste disposal and transport and the fate of contaminated materials; evaluation of burial rates...
Design and performance of a horizontal mooring for upper-ocean research
Mark Grosenbaugh, Steven Anderson, Richard Trask, Jason Gobat, Walter Paul, Bradford Butman, Robert Weller
2002, Journal of Atmospheric and Oceanic Technology (19) 1376-1389
This paper describes the design and performance of a two-dimensional moored array for sampling horizontal variability in the upper ocean. The mooring was deployed in Massachusetts Bay in a water depth of 84 m for the purpose of measuring the horizontal structure of internal waves. The mooring was instrumented with...
Basis and methods of NASA airborne topographic mapper lidar surveys for coastal studies
John Brock, C. Wayne Wright, Asbury H. Sallenger Jr., William B. Krabill, Robert N. Swift
2002, Journal of Coastal Research (18) 1-13
This paper provides an overview of the basic principles of airborne laser altimetry for surveys of coastal topography, and describes the methods used in the acquisition and processing of NASA Airborne Topographic Mapper (ATM) surveys that cover much of the conterminous US coastline. This form of remote sensing, also known...
Interpreting the earthquake source of the Wabash Valley seismic zone (Illinois, Indiana, and Kentucky) from seismic-reflection, gravity, and magnetic-intensity data
John H. McBride, Thomas G. Hildenbrand, William J. Stephenson, Christopher J. Potter
2002, Seismological Research Letters (73) 660-686
Reprocessing of seismic-reflection data reveals new images of upper- to middle-crustal structures beneath the Wabash Valley seismic zone, located north of the New Madrid seismic zone within the seismically active southern Illinois basin. Four intersecting deep seismic profiles (243 km total) indicate an anomalous, 5–10-km-wide zone of dipping reflections and...
Tectonic map of the Death Valley ground-water model area, Nevada and California
J.B. Workman, C.M. Menges, W. R. Page, E. B. Ekren, P. D. Rowley, G. L. Dixon
2002, Miscellaneous Field Studies Map 2381-B
No abstract available. ...
Effects of stress from mine drainage on diversity, biomass, and function of primary producers in mountain streams
Dev K. Niyogi, William M. Lewis Jr., Diane M. McKnight
2002, Ecosystems (5) 554-567
This paper proposes a hypothesis that relates biodi- versity, community biomass, and ecosystem func- tion to a gradient of stress. According to this hy- pothesis, biodiversity has a low threshold of response to stress, whereas biomass and function are stable or increase under low to moderate stress and decrease...
Geological map of the Kaiwan Fluctus Quadrangle (V-44), Venus
Nathan T. Bridges, George E. McGill
2002, IMAP 2747
Introduction The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the Venusian atmosphereon October 12, 1994. Magellan had the objectives of: (1) improving knowledge of the geologic processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology and (2) improving...
Occurrence and distribution of microbiological contamination and enteric viruses in shallow ground water in Baltimore and Harford counties, Maryland
William S.L. Banks, David A. Battigelli
2002, Water-Resources Investigations Report 2001-4216
The U.S. Geological Survey, in cooperation with the Maryland Department of the Environment and the Wisconsin State Laboratory of Hygiene, conducted a study to characterize the occurrence and distribution of viral contamination in small (withdrawing less than 10,000 gallons per day) public water-supply wells screened in the shallow aquifer in...
Factors related to well yield in the fractured-bedrock aquifer of New Hampshire
Richard Bridge Moore, Gregory E. Schwartz, Stewart F. Clark, Gregory J. Walsh, James R. Degnan
2002, Professional Paper 1660
The New Hampshire Bedrock Aquifer Assessment was designed to provide information that can be used by communities, industry, professional consultants, and other interests to evaluate the ground-water development potential of the fractured-bedrock aquifer in the State. The assessment was done at statewide, regional, and well field scales to identify relations...
Epigenetic lead, zinc, silver, antimony, tin, and gold veins in Boulder Basin, Blaine and Custer Counties, Idaho: Potential for economic tin mineralization
Michael E. Ratchford
2002, Bulletin 2064-JJ
Boulder Basin is in a northwest-trending belt of allochthonous Paleozoic rocks in the Boulder Mountains of central Idaho. Regional Tertiary extension resulted in widespread normal faulting and coeval emplacement of shallow-level intrusions and extrusive rocks of the Challis Volcanic Group. Epigenetic lead-zinc-silver-antimony-tin-gold vein deposits formed during Tertiary extension and are...
User's guide to SEAWAT; a computer program for simulation of three-dimensional variable-density ground-water flow
Weixing Guo, C.D. Langevin
2002, Techniques of Water-Resources Investigations 06-A7
This report documents a computer program (SEAWAT) that simulates variable-density, transient, ground-water flow in three dimensions. The source code for SEAWAT was developed by combining MODFLOW and MT3DMS into a single program that solves the coupled flow and solute-transport equations. The SEAWAT code follows a modular structure, and thus, new...
Map Showing Seacliff Response to Climatic and Seismic Events, Seacliff State Beach, Santa Cruz County, California
Cheryl J. Hapke, Bruce M. Richmond, Mimi M. D’Iorio
2002, Miscellaneous Field Studies Map 2399
INTRODUCTION The coastal cliffs along much of the central California coast are actively retreating. Large storms and periodic earthquakes are responsible for most of the documented seacliff slope failures. Long-term average erosion rates calculated for this section of coast (Moore and others, 1999) do not provide the spatial or temporal data...
Map Showing Seacliff Response to Climatic and Seismic Events, Depot Hill, Santa Cruz County, California
Cheryl J. Hapke, Bruce M. Richmond, Mimi M. D’Iorio
2002, Miscellaneous Field Studies Map 2398
INTRODUCTION The coastal cliffs along much of the central California coast are actively retreating. Large storms and periodic earthquakes are responsible for most of the documented seacliff slope failures. Long-term average erosion rates calculated for this section of coast (Moore and others, 1999) do not provide the spatial or temporal data...
Spatial data available on the web at http://mrdata.usgs.gov/
Bruce Johnson
2002, Fact Sheet 071-02
Earth science information is important to decisionmakers who formulate public policy related to mineral resource sustainability, land stewardship, environmental hazards, the economy, and public health. To meet the growing demand for easily accessible data, the Mineral Resources Program has developed, in cooperation with other Federal and State agencies, an Internet-based,...
Geologic map of the Bell Regio Quadrangle (V-9), Venus
Bruce A. Campbell, Patricia G. Campbell
2002, IMAP 2743
The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the venusian atmosphere on October 12, 1994. Magellan had the objectives of (1) improving knowledge of the geologic processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology and (2)...
A census of marine life: Unknowable or just unknown?
Cynthia J. Decker, Ron O’Dor
2002, Oceanologica Acta (25) 179-186
As an introduction to the entire volume, this article outlines the relationships among the five elements of the Census of Marine Life (CoML) that create new knowledge: (1) The Ocean Biogeographic Information System (OBIS), a marine component of the Global Biodiversity Information Facility, links marine databases around the world to...
Simulation of flow and water quality of the Arroyo Colorado, Texas, 1989-99
Timothy H. Raines, Roger M. Miranda
2002, Water-Resources Investigations Report 2002-4110
A model parameter set for use with the Hydrological Simulation Program—FORTRAN watershed model was developed to simulate flow and water quality for selected properties and constituents for the Arroyo Colorado from the city of Mission to the Laguna Madre, Texas. The model simulates flow, selected water-quality properties, and constituent concentrations....
Publications of Western Earth Surface Processes Team 2001
II Charles Powell Charles,(compiler), R. W. Graymer
2002, Open-File Report 2002-269
The Western Earth Surface Processes Team (WESPT) of the U.S. Geological Survey (USGS) conducts geologic mapping and related topical earth-science studies in the Western United States. This work is focused on areas where modern geologic maps and associated earth-science data are needed to address key societal and environmental issues, such...
Java programs for using Newmark's method to model slope performance during earthquakes
Randall W. Jibson, Matthew W. Jibson
2002, Open-File Report 2002-201
Feasibility of Estimating Constituent Concentrations and Loads Based on Data Recorded by Acoustic Instrumentation
A.C. Lietz
2002, Open-File Report 2002-285
The acoustic Doppler current profiler (ADCP) and acoustic Doppler velocity meter (ADVM) were used to estimate constituent concentrations and loads at a sampling site along the Hendry-Collier County boundary in southwestern Florida. The sampling site is strategically placed within a highly managed canal system that exhibits low and rapidly changing...
Controlled photomosaic map of Callisto JC 15M CMN
Water Resources Division, U.S. Geological Survey
2002, IMAP 2770
This sheet is one in a series of maps of the Galilean satellites of Jupiter at a nominal scale of 1:15,000,000. This series is based on data from the Galileo Orbiter Solid-State Imaging (SSI) camera and the cameras of the Voyager 1 and 2 spacecraft. Mercator and Polar Stereographic projections...
