Richard Z. Poore, J. Schroeder, A. McMahon
2000, Open-File Report 2000-35
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Page 3183, results 79551 - 79575
Publication Extents
Not all publications have extents, not all extents are completely accurateM. Alisa Mast, David W. Clow
2000, Circular 1173-D
This report describes the environmental characteristics and water-quality characteristics of 12 hydrologic benchmark network streams in the Western United States. This information was compiled to aide in the interpretation and application of water-quality data collected as part of the Hydrologic Benchmark Network Program....
W. W. Patton Jr., E. J. Moll-Stalcup
2000, IMAP 2677
Introduction The Nulato quadrangle encompasses approximately 17,000 km2 (6,500 mi2) of west-central Alaska within the Yukon River drainage basin. The quadrangle straddles two major geologic features-the Yukon-Koyukuk sedimentary basin, a huge triangle-shaped Cretaceous depression that stretches across western Alaska from the Brooks Range to the Yukon delta; and the Ruby geanticline,a...
Steven H. Pilcher
2000, Open-File Report 2000-21
No abstract available....
James K. Otton
2000, Open-File Report 2000-41
No abstract available....
V. L. Rystrom, Carol A. Finn, Maryla Deszcz-Pan
2000, Open-File Report 2000-27
In October 1996, the USGS conducted a high resolution airborne magnetic and electromagnetic survey in order to discern through-going sections of exposed altered rocks and those obscured beneath snow, vegetation and surficial unaltered rocks. Hydrothermally altered rocks weaken volcanic edifices, creating the potential for catastrophic sector collapses and ensuing formation...
N. M. Ratcliffe
2000, IMAP 2598
Constance J. Nutt
2000, IMAP 2691
Data set describes the geology of Paleozoic through Quaternary units in the Alligator Ridge area, which hosts disseminated gold deposits. These digital files were used to create the 1:24,000-scale geologic map of the Buck Mountain East and Mooney Basin Summit Quadrangles and parts of the Sunshine Well NE and Long...
Kevin F. Dennehy
2000, Fact Sheet 091-00
Over the last 25 years, industry and government have made large financial investments aimed at improving water quality across the Nation. Significant progress has been made; however, many water-quality concerns remain. In 1991, the U.S. Geological Survey (USGS) began implementing a full-scale National Water-Quality Assessment Program to provide consistent and...
Eduardo Patino, Clinton D. Hittle
2000, Fact Sheet 030-00
Changes in water-management practices have been made to accommodate a large and rapidly growing urban population along the Atlantic Coast and to meet the demand for intensive agricultural activities. These changes have resulted in a highly managed hydrologic system consisting of numerous canals, levees, control structures, and pumping stations that...
Christopher J. Harpel, John W. Ewert
2000, Open-File Report 2000-17
The 1980's and 1990's were marked by frequent worldwide destructive volcanic eruptions. Significant loss of life and property during eruptions, and extensive media coverage of volcanic events around the globe have brought volcanic processes and hazards increasingly to the forefront of scientific, governmental, and public attention (e.g., Casadevall, 1994; Pringle, 1994). A result of...
James C. Storey, Mike Choate
2000, Conference Paper, Proceedings, Aerosense 2000 algorithms for multispectral, hyperspectral, and ultraspectral imagery VI
The Landsat 7 Image Assessment System was developed to characterize and calibrate the radiometric and geometric performance of the Landsat 7 Enhanced Thematic Mapper Pius (ETM+) instrument. Algorithms and software assess the geometric performance of the Landsat 7 spacecraft and ETM+ sensor system and perform geometric calibration by estimating sensor...
Grant R. Mah, James Vogelmann, Mike Choate
2000, Conference Paper, Proceedings, Aerosense 2000 algorithms for multispectral, hyperspectral, and ultraspectral imagery VI
There was a one-time opportunity to obtain nearly coincident coverage from both Landsat 5 and Landsat 7 as Landsat 7 drifted to its final orbital position during the initialization and verification phase following launch. During the underfly period, Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data were collected using the...
Brenda Jones, LeAnn Dix
2000, Conference Paper, Proceedings, Aerosense 2000 algorithms for multispectral, hyperspectral, and ultraspectral imagery VI
Staff at the U.S. Geological Survey (USGS) EROS Data Center (EDC) process Landsat 7 data for customer distribution on two distinct systems. The Distributed Active Archive Center (DAAC) processing is done on the Level -1 Product Generation System (LPGS), and the USGS processing is completed on the National Land Archive...
Robert W. Simpson
2000, Science (289) 1147-1148
No abstract available....
Elisabeth Fourtanier, John A. Barron
2000, Proceedings of the Ocean Drilling Program: Scientific Results 169S-1
Ocean Drilling Program (ODP) Site 1034 (48°38.000´N, 123°30.000´W) was drilled at a water depth of 200 m in the Saanich Inlet, an anoxic fjord on the southeastern coast of Vancouver Island, British Columbia, to a depth of 118.2 meters below seafloor (mbsf). The uppermost 50 m consists of very well-laminated...
Margaret Jane Knaus, Garland R. Upchurch Jr., W.H. Gillespie
2000, Review of Palaeobotany and Palynology (111) 71-92
A fossil plant discovery from the Price (Pocono) Formation of southeastern West Virginia provides new information on the poorly known compression floras of the Lower Mississippian of North America. The new plant described herein consists of long tapering bipinnate fronds with imbricate basal pinnae, planate apical pinnae, and unlobed, elliptical to obovate pinnules with open dichotomous...
Yassar H. El-Farhan, Nicole M. DeNovio, Janet S. Herman, George M. Hornberger
2000, Environmental Science & Technology (34) 3555-3559
Evidence that fine particles mobilized and transported in soils and aquifers can have a profound influence on contaminant migration has spawned much interest recently in understanding colloid transport in natural materials. Repeated infiltration experiments on an initially dry field soil were conducted to evaluate rates of mobilization of fine particles...
Shao-Yong Jiang, John F. Slack, Martin R. Palmer
2000, Geology (28) 751-754
We report here Sm and Nd isotope data for hydrothermal tourmalinites and sulfide ores from the giant Sullivan Pb-Zn-Ag deposit, which occurs in the lower part of the Mesoproterozoic Purcell (Belt) Supergroup. Whole-rock samples of quartz-tourmaline tourmalinite from the footwall alteration pipe yield a Sm-Nd isochron age of 1470 ±...
J. L. Macias, J. M. Espíndola, A. Garcia-Palomo, K. M. Scott, S. Hughes, J C. Mora
2000, Geological Society of America Bulletin (112) 1234-1249
Tacaná volcano, located on the border between Mexico and Guatemala, marks the northern extent of the Central American volcanic chain. Composed of three volcanic structures, it is a volcanic complex that has had periodic explosive eruptions for at least the past 40 k.y. The most recent major eruption occurred at...
Valerie F. Paskevich
2000, Open-File Report 2000-19
No abstract available....
John M. Bartholow
2000, Open-File Report 99-112
I am pleased to have had the opportunity to revise the first version of this set of course notes for the stream temperature models. In some ways, there have been many changes and in some ways the notes have stayed much the same. Generally, I was satisfied that the notes...
D. E. Boleneus, R. E. Derkey
2000, Open-File Report 2000-14-B
This report includes a table of 339 sites representing mineral activities for mining and mineral exploration in the State of Washington from 1985 through 1997. The table was primarily compiled from annual reports in Washington Geologic Newsletter and Washington Geology. The information was compiled for use in a weights-of-evidence analysis...
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 095-00
Many geologic records of climatic and environmental change based on various proxy variables exhibit distinct cyclicities that have been attributed to extraterrestrial forcing. The best known of these are the changes in Earth’s orbital geometry called Milankovitch Cycles, with periodicities of tens to hundreds of thousands of years. However, many...
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 083-00
The U.S. Geological Survey's (USGS) Earth Explorer Web site provides access to millions of land-related products, including the following: Satellite images from Landsat, advanced very high resolution radiometer (AVHRR), and Corona data sets. Aerial photographs from the National Aerial Photography Program, NASA, and USGS data sets. Digital cartographic data from...