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Publications

Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.

Filter Total Items: 1829

Mars' "White Rock" feature lacks evidence of an aqueous origin: Results from Mars Global Surveyor

The “White Rock” feature on Mars has long been viewed as a type example for a Martian playa largely because of its apparent high albedo along with its location in a topographic basin (a crater). Data from the Mars Global Surveyor Thermal Emission Spectrometer (TES) demonstrate that White Rock is not anomalously bright relative to other Martian bright regions, reducing the significance of its albed
Authors
S. W. Ruff, P. R. Christensen, Roger N. Clark, H. H. Kieffer, M. C. Malin, J. L. Bandfield, B. M. Jakosky, M. D. Lane, M. T. Mellon, M. A. Presley

Investigating a physical basis for spectroscopic estimates of leaf nitrogen concentration

The reflectance spectra of dried and ground plant foliage are examined for changes directly due to increasing nitrogen concentration. A broadening of the 2.1-??m absorption feature is observed as nitrogen concentration increases. The broadening is shown to arise from two absorptions at 2.054 ??m and 2.172 ??m. The wavelength positions of these absorptions coincide with the absorption characteristi
Authors
R.F. Kokaly

Application of geophysical techniques to minerals-related environmental problems

No abstract available.
Authors
Ken Watson, David Fitterman, R. W. Saltus, Anne McCafferty, Gregg A. Swayze, Stan Church, Kathy Smith, Marty Goldhaber, Stan Robson, Pete McMahan

Environmental studies of the World Trade Center area after the September 11, 2001 attack

This web site describes the results of an interdisciplinary environmental characterization of the World Trade Center (WTC) area after September 11, 2001.Information presented in this site was first made available to the World Trade Center emergency response teams on September 18, 2001 (Thermal hot spot information), and September 27, 2001 (maps and compositional results).The Airborne Visible / Inf
Authors
Roger N. Clark, Robert O. Green, Gregg A. Swayze, Greg Meeker, Steve Sutley, Todd M. Hoefen, K. Eric Livo, Geoff Plumlee, Betina Pavri, Chuck Sarture, Steve Wilson, Phil Hageman, Paul Lamothe, J. Sam Vance, Joe Boardman, Isabelle Brownfield, Carol Gent, Laurie C. Morath, Joseph Taggart, Peter M. Theodorakos, Monique Adams

Images of the World Trade Center site show thermal hot spots on September 16 and 23, 2001

No abstract available.
Authors
Roger N. Clark, Robert O. Green, Gregg A. Swayze, Todd M. Hoefen, K. Eric Livo, Betina Pavi, Chuck Sarcher, Joe Boardman, J. Sam Vance

A procedural manual for measurement of uranium and thorium isotopes utilizing the USGS-Stanford Finnegan Mat 262

Over the past several decades investigators have extensively examined the 238U-234U- 230Th systematics of a variety of geologic materials using alpha spectroscopy. Analytical uncertainty for 230Th by alpha spectroscopy has been limited to about 2% (2σ). The advantage of thermal ionization mass spectroscopy (TIMS), introduced by Edwards and co-workers in the late 1980’s is the increased detectabili
Authors
Donald D. Shamp

Log for Joint SEPM-Colorado Scientific Society field trip, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range, from Westcliffe to Crestone, Colorado

This trip will cross the northern Sangre de Cristo Range, from Westcliffe to Crestone, Colorado, by way of the Hermit Pass Road and the Rito Alto pack trail (Fig. 1 below; road and trail shown on Fig. 2). The traverse is designed to give the geologist a sample of the structure and stratigraphy of this part of the range. Emphasis will be on the relationship between the horst of the Sangre de Cristo
Authors
David A. Lindsey

Databases and simplified geology for mineralized areas, claims, mines and prospects in Wyoming

No abstract available.
Authors
Anna B. Wilson, Terry L. Klein, William D. Heran
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