Geomorphometry-Diversity in quantitative surface analysis
Richard J. Pike
2000, Progress in Physical Geography: Earth and Environment (24) 1-20
A widening variety of applications is diversifying geomorphometry (digital terrain modelling), the quantitative study of topography. An amalgam of earth science, mathematics, engineering and computer science, the discipline has been revolutionized by the computer manipulation of gridded terrain heights, or digital elevation models (DEMs). Its rapid expansion continues. This article...
Monitoring beach morphology changes using small-format aerial photography and digital softcopy photogrammetry
Cheryl Hapke, Bruce M. Richmond
2000, Environmental Geosciences (7) 32-37
Current methods of monitoring beach morphology changes commonly involve the establishment of Global Positioning System profiles that are surveyed on a regular basis. Although this method produces precise measurements of coastal topography, it is costly in time and effort and may result in large data gaps between profiles. Much of...
Revised age of the Rockland tephra, northern California: Implications for climate and stratigraphic reconstructions in the western United States: Comment
Andrei M. Sarna-Wojcicki
2000, Geology (28) 286
Lanphere et al. (1999) presented new data for the age of the Rockland pumice tuff breccia of Wilson (1961) using the incremental-heating 40Ar/39Ar technique. Their age, ∼610 ka, is ∼200 ka older than zircon fission-track ages obtained on this tuff by <a class="link link-ref link-reveal...
Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma counties, California
M.C. Blake Jr., D. L. Jones, R. W. Graymer, Adam digital database by Soule
2000, Miscellaneous Field Studies Map 2337
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (mageo.txt, mageo.pdf, or mageo.ps), it provides current information on the geologic structure and stratigraphy...
The U.S. Geological Survey National Research Program in the hydrologic sciences
Mary Jo Baedecker, Linda C. Friedman, editor(s)
2000, Circular 1195
The National Research Program (NRP) conducts a wide variety of scientific studies related to hydrology, focusing on long-term investigations. This circular conveys general information about the NRP and highlights a few of the program's research activities....
Geologic map of the Eminence Quadrangle, Shannon County, Missouri
R. C. Orndorff, R.W. Harrison, D. J. Weary
2000, IMAP 2653
Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface
Derek R. Lovely, Robert T. Anderson
2000, Hydrogeology Journal (8) 77-88
Geobacter become dominant members of the microbial community when Fe(III)-reducing conditions develop as the result of organic contamination, or when Fe(III) reduction is artificially stimulated. These results suggest that further understanding of the ecophysiology of Geobacter species would aid in better prediction of the natural attenuation of organic...
The National Atlas of the United StatesTM maps
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 107-99
The National Atlas of the United States of America™, published by the U.S. Geological Survey (USGS) in 1970, is out of print, but many of its maps can be purchased separately. Maps that span facing pages in the atlas are printed on one sheet. Maps dated after 1970 and before 1997 are either revisions of original atlas...
The effects of the Chesapeake Bay impact crater on the geologic framework and the correlation of hydrogeologic units of southeastern Virginia, south of the James River
David S. Powars
2000, Professional Paper 1622
About 35 million years ago, a large comet or meteor slammed into the shallow shelf on the western margin of the Atlantic Ocean, creating the Chesapeake Bay impact crater. This report, the second in a series, refines the geologic framework of southeastern Virginia, south of the James River in and...
Geologic studies in Alaska by the U.S. Geological Survey, 1997
Karen D. Kelley, editor(s)
2000, Professional Paper 1614
The eight papers that follow continue the series of U.S. Geological Survey (USGS) reports on investigations in the geologic sciences in Alaska. The series presents new and sometimes preliminary findings that are of interest to earth scientists in academia, government, and industry; to land and resource managers; and to the...
The Shamut coal deposit, north-central Armenia
Brenda S. Pierce, Gourgen Malkhasian, Artur Martirosyan
2000, Bulletin 2175
Public water-supply use in Kansas, 1987–97
Joan F. Kenny
2000, Fact Sheet 187-99
Annual State reporting requirements yield data on public water-supply use in Kansas. data is essential for responsible and effective use of the information by various State agencies. This fact sheet describes water-use data evaluation, illustrates variations in public-supply water use from 1987 through 1997, and documents improvements in water conservation...
Washington
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 049-99
Using OTIS to model solute transport in streams and rivers
Robert L. Runkel
2000, Fact Sheet 138-99
Solute transport in streams and rivers is governed by a suite of hydrologic and geochemical processes. Knowledge of these processes is needed when assessing the fate of contaminants that are released into surface waters. The study of solute fate and transport often is aided by solute transport models that mathematically...
Impact of storm-water outfalls on sediment quallity in corpus Christi Bay, Texas, USA
R. Scott Carr, Paul A. Montagna, James M. Biedenbach, Rick Kalke, Mahlon C. Kennicutt, Russell L. Hooten, Geraldine Cripe
2000, Environmental Toxicology and Chemistry (19) 561-574
To determine the quality of sediments and extent of contaminant impacts, a Sediment Quality Triad (SQT) study was conducted at 36 sites in the Corpus Christi Bay, Texas, USA, system. Fifteen of the 36 sites were located near storm-water outfalls, but 13 other sites (i.e., industrial and domestic outfalls, oil...
Direct behavioral evidence that unique bile acids released by larval sea lamprey (Petromyzon marinus) function as a migratory pheromone
Rickard Bjerselius, Weiming Li, John H. Teeter, James G. Seelye, Peter B. Johnson, Peter J. Maniak, Gerold C. Grant, Christine N. Polkinghorne, Peter W. Sorensen
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 557-569
Four behavioral experiments conducted in both the laboratory and the field provide evidence that adult sea lamprey (Petromyzon marinus) select spawning rivers based on the odor of larvae that they contain and that bile acids released by the larvae are part of this pheromonal odor. First, when tested in a...
Altitude of the top of the Inyan Kara Group in the Black Hills area, South Dakota
Janet M. Carter, Jack A. Redden
2000, Hydrologic Atlas 744-A
This map is a product of the Black Hills Hydrology Study, which was initiated in 1990 to assess the quantity, quality, and distribution of surface water and ground water in the Black Hills area of South Dakota (Driscoll, 1992). This long-term study is a cooperative effort between the U.S. Geological...
Water levels and ground-water discharge, regional aquifer system of the midwestern Basins and Arches Region, in parts of Indiana, Ohio, Illinois, and Michigan
Sandra M. Eberts
2000, Hydrologic Atlas 725
Aquifers in Quaternary glacial deposits and the underlying Silurian and Devonian carbonate bedrock in parts of Indiana, Ohio, Illinois, and Michigan compose the regional aquifer system under investigation as part of the Midwestern Basins and Arches Regional Aquifer System Analysis (Midwestern Basins and Arches—RASA) project of the U.S. Geological Survey...
Evaluation and application of the transient-pulse technique for determining the hydraulic properties of low permeability rocks: Part 2: Experimental application
M. Zhang, M. Takahashi, R. Morin, T. Esaki
2000, Geotechnical Testing Journal (23) 91-99
In Part 1 of this study, the general solution to the transient-pulse test (Hsieh et al. 1981) was extended to evaluate quantitatively the transient variations in hydraulic head and the corresponding distributions of hydraulic gradient within a test specimen. In addition, the conditions and the validity of using the expression...
Wyoming
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 052-99
Altitude of the Top of the Minnelusa Formation in the Black Hills area, South Dakota, 1999
Janet M. Carter, Jack A. Redden
2000, Hydrologic Atlas 744-C
This map is a product of the Black Hills Hydrology Study, which was initiated in 1990 to assess the quantity, quality, and distribution of surface water and ground water in the Black Hills area of South Dakota (Driscoll, 1992). This long-term study is a cooperative effort between the U.S. Geological...
Trends in surface-water quality during implementation of best-management practices in Mill Creek and Muddy Run Basins, Lancaster County, Pennsylvania
Edward H. Koerkle
2000, Fact Sheet 168-99
Analyses of water samples collected over a 5-year period (1993-98) in the Mill Creek and Muddy Run Basins during implementation of agricultural best-management practices (BMP’s) indicate statistically significant trends in the concentrations of several nutrient species and in nonfilterable residue (suspended solids). The strongest trends identified were those indicated by...
Kansas
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 001-99
Geologic map of the Urbana quadrangle, Frederick and Montgomery Counties, Maryland
Scott Southworth
2000, Geologic Quadrangle 1768
No abstract available....
Compositional analyses of small lunar pyroclastic deposits using Clementine multispectral data
Lisa R. Gaddis, Bernard Ray Hawke, Mark S. Robinson, Cassandra Coombs
2000, Journal of Geophysical Research E: Planets (105) 4245-4262
Clementine ultraviolet-visible (UVVIS) data are used to examine the compositions of 18 pyroclastic deposits (15 small, three large) at 13 sites on the Moon. Compositional variations among pyroclastic deposits largely result from differing amounts of new basaltic (or juvenile) material and reworked local material entrained in their ejecta upon eruption....
