Gold recycling in the United States in 1998
Earle B. Amey
2001, Circular 1196-A
In 1998, 175 metric tons (t) of refined gold was recovered by U.S. refiners from old and new scrap. The overall recycling rate was 29 percent when scrap consumption was compared with apparent domestic supply. Sources of old scrap includes discarded jewelry, dental materials, plating solutions, and electronic equipment. A...
Estimation of hydraulic characteristics in the Santa Fe Group aquifer system using computer simulations of river and drain pulses in the Rio Bravo study area, near Albuquerque, New Mexico
D.M. Roark
2001, Water-Resources Investigations Report 2001-4069
In 1997, the U.S. Geological Survey conducted a hydrologic investigation of the surface-water/ground-water interaction of the Rio Grande and the surrounding alluvium and the Santa Fe Group aquifer system in an area near the Rio Bravo Bridge, south of Albu- querque, New Mexico. A set of existing wells and new wells...
Effects of urban development on stormwater runoff characteristics for the Houston, Texas, metropolitan area
Fred Liscum
2001, Water-Resources Investigations Report 2001-4071
A study was done to estimate the effects of urban development in the Houston, Texas, metropolitan area on nine stormwater runoff characteristics. Three of the nine characteristics define the magnitude of stormwater runoff, and the remaining six characteristics describe the shape and duration of a storm hydrograph. Multiple linear regression...
Rock magnetic studies of the Oligocene Creede Formation and prospects for a polarity stratigraphy
Richard L. Reynolds, J. G. Rosenbaum, D. S. Sweetkind, M. A. Lanphere, C. A. Rice, M. L. Tuttle
2001, Open-File Report 94-260-M
No abstract available....
Quaternary and Late Pliocene geology of the Death Valley region: Recent observations on tectonics, stratigraphy, and lake cycles (guidebook for the 2001 Pacific Friends of the Pleistocene fieldtrip)
Michael N. Machette, Margo L. Johnson, Janet L. Slate
2001, Open-File Report 2001-51
No abstract available....
Overview of the Creede caldera Continental Scientific Drilling Program
Philip Martin Bethke, W. R. Campbell, J. B. Hulen, T. H. Moses Jr.
2001, Open-File Report 94-260-A
No abstract available....
Volcano hazards in the Three Sisters region, Oregon
William E. Scott, R.M. Iverson, S. P. Schilling, B.J. Fisher
2001, Open-File Report 99-437
Three Sisters is one of three potentially active volcanic centers that lie close to rapidly growing communities and resort areas in Central Oregon. Two types of volcanoes exist in the Three Sisters region and each poses distinct hazards to people and property. South Sister, Middle Sister, and Broken Top, major...
Preface; Water quality of large U.S. rivers; results from the U.S. Geological Survey's National Stream Quality Accounting Network
Robert M. Hirsch, Richard P. Hooper
Valerie J. Kelly, editor(s)
2001, Hydrological Processes (15) 1085-1087
The mission of the US Geological Survey (USGS) is to assess the quantity and quality of the earth resources of the USA and to provide information that will assist resource managers and policymakers at federal, state and local levels in making sound decisions. Characterizing the water quality of the largest...
Geologic evidence of earthquakes at the Snohomish Delta, Washington, in the past 1200 yr
Joanne Bourgeois, Samuel Y. Johnson
2001, Geological Society of America Bulletin (113) 482-494
Exposed channel banks along distributaries of the lower Snohomish delta in the Puget Lowland of Washington reveal evidence of at least three episodes of liquefaction, at least one event of abrupt subsidence, and at least one tsunami since ca. A.D. 800. The 45 measured stratigraphic sections consist mostly of 2–4...
The state of mining in Africa
George J. Coakley
2001, Geotimes (46) 24-25
No abstract available. ...
Discussion and reply: Variation in displacement along strike of the South Virgin−White Hills detachment fault: Perspective from the northern White Hills, northwestern Arizona
R. Ernest Anderson
2001, Geological Society of America Bulletin (113) 532-533
No abstract available....
Landslides; effects on the natural environment
2001, Conference Paper, Proceedings - 22nd International Symposium on Engineering Geology and the Environment
No abstract available....
Impacts of heterogeneous organic matter on phenanthrene sorption--Different soil and sediment samples
Hrissi K. Karapanagioti, Jeffrey Childs, David A. Sabatini
2001, Environmental Science & Technology (35) 4684-4690
Organic petrography has been proposed as a tool for characterizing the heterogeneous organic matter present in soil and sediment samples. A new simplified method is proposed as a quantitative means of interpreting observed sorption behavior for phenanthrene and different soils and sediments based on their organic petrographical characterization. This method...
Strain accumulation near Yucca Mountain, Nevada, 1993-1998
James C. Savage, Jerry L. Svarc, W.H. Prescott
2001, Journal of Geophysical Research (106) 16483-16488
A 50‐km aperture geodetic network centered on the proposed high‐level radioactive waste disposal site at Yucca Mountain, Nevada, was surveyed with GPS in 1993 and 1998. The average deformation rate across the area is described by the principal strain rates 22.8±8.8 nstrain yr N77.6°W±13.5° and −8.8±11.9 nstrain yr N12.5°E±13.5° (extension...
Natural attenuation strategy for groundwater cleanup focuses on demonstrating cause and effect
Barbara A. Bekins, Bruce E. Rittmann, J. A. MacDonald
2001, Eos, Transactions, American Geophysical Union (82) 53-58
In the 20 years since cleanup of contaminated groundwater has been a high priority in the United States, recognition of both the scope of the problem and the technical difficulties involved has grown steadily. Estimates of the number of hazardous waste sites where groundwater may be contaminated vary between 300,000...
The interplay of species concepts, taxonomy, and conservation: lessons from the Hawaiian avifauna
H. Douglas Pratt, Thane K. Pratt
2001, Studies in Avian Biology (22) 68-80
The Hawaiian Islands, with their unique geological history and geographic position, provide an excellent natural laboratory in which to evaluate currently competing biological (BSC) and phylogenetic (PSC) concepts of the species. Although the BSC as historically applied in archipelagic situations is shown to be flawed in producing overlumped polytypic species,...
Great Basin geothermal
John Sass
2001, Geothermal Resources Council Bulletin (30) 195-197
No abstract available....
Deposition of Mount Mazama tephra in a landslide-dammed lake on the upper Skagit River, state of Washington
Jon Riedel, P. T. Pringle, Robert L. Schuster
2001, Book chapter, Volcaniclastic Sedimentation in Lacustrine Settings
The cataclysmic eruption of Mount Mazama, Oregon, at c. 6730 (super 14) C yr BP, deposited tephra over 1.0 X 10 (super 6) km (super 2) of north-western North America. Primary tephra fall accumulated to a thickness of 2 cm in the upper Skagit River watershed, Washington. Mazama tephra eroded...
Data files from “CWB Free-Field Strong-Motion Data from the 21 September Chi-Chi, Taiwan, Earthquake”
W.H.K. Lee, T. C. Shin, K.W. Kuo, K. C. Chen, C.-F. Wu
2001, Bulletin of the Seismological Society of America (91) 1390-1390
The Central Weather Bureau (CWB) of Taiwan completed a deployment of 1200 modern digital strong-motion instruments in 1996 at free-field sites and in buildings and bridges. Consequently, a very extensive set of strong-motion records were obtained for the MW = 7.6 Chi-Chi earthquake in 1999, including over 60 near-field records...
CWB free-field strong-motion data from the 21 September Chi-Chi, Taiwan, earthquake
W.H.K. Lee, T. C. Shin, Kenneth C. Kuo, C.-F. Wu
2001, Bulletin of the Seismological Society of America (91) 1370-1376
The Chi-Chi earthquake occurred at 17:47 on 20 September 1999 and is the largest earthquake (MW 7.6) to have occurred on land in Taiwan in the twentieth century. This earthquake caused considerable damage and was named the “921 Chi-Chi Great Earthquake” by the Taiwan government, as the local date was 21...
Ground water and surface water: the linkage tightens, but challenges remain
Thomas C. Winter
2001, Hydrological Processes (15) 3605-3606
Hydrologists have recognized for more than a century that groundwater and surface...
Floods & droughts: a Sierra Nevada perspective
M. D. Dettinger
2001, Conference Paper, Proceedings, state of the estuary conference
No abstract avaiable ...
CISNet San Pablo Bay network of environmental stress indicators: the CISNet hydrodynamic database
M.F. Barad, S.G. Schladow, J.C. Warner, D. H. Schoellhamer
2001, Conference Paper, Proceedings of the 5th biennial State of the Estuary Conference
Geologic constraints on the upper limits of reserve growth
Richard G. Stanley
2001, Open-File Report 2001-265
For many oil and gas fields, estimates of ultimate recovery (the sum of cumulative production plus estimated reserves) tend to increase from one year to the next, and the gain is called reserve growth. Forecasts of reserve growth by the U.S. Geological Survey rely on statistical analyses of historical records...
Ground-water-level monitoring and the importance of long-term water-level data
Charles J. Taylor, William M. Alley
2001, Circular 1217
Water-level measurements from observation wells are the principal source of information about the effects of hydrologic stresses on ground-water systems. Long-term water-level data are required to address the effects of aquifer development and to compile a hydrologic record of water-level monitoring, uses of long-term water-level data, and improvements in the...
