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: 1904
SPECtrum Processing Routines User's Manual Version 3 (program SPECPR) SPECtrum Processing Routines User's Manual Version 3 (program SPECPR)
Introduction The SPECtrum Processing Routines (SPECPR) is a large-scale interactive program for general one-dimensional array processing and optimized for reflectance spectroscopy data and analysis. The program processes one-dimensional arrays up to 4852 data points and the operations include addition, subtraction, multiplication, division, trigonometric functions, logarithmic and...
Authors
Roger Clark
Spectral Distinctions between the Leading and Trailing Hemispheres of Callisto: New Observations Spectral Distinctions between the Leading and Trailing Hemispheres of Callisto: New Observations
An analysis of recent telescopic observations of Callisto results in new insights regarding spectral variations from the leading to the trailing hemisphere of Callisto. Examination of data in the wavelength range from 2.0 to 2.5 ??m indicates that previous suggestions of spectral differences are most likely the result of experimental uncertainty or error. Slight variations in the slope...
Authors
W. Calvin, R. Clark
SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00 SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00
No abstract available
Authors
K.E. Livo, Roger Clark, Daniel Knepper
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993 Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V.J. Grauch, J. D. Phillips, D.B. Hoover, J. Pitkin, K.E. Livo, A. McCafferty
Understanding our fragile environment; Lessons from geochemical studies Understanding our fragile environment; Lessons from geochemical studies
An understanding of our fragile environment can begin with a recognition of the importance of certain elements, commonly called "minerals substances" (such as iron and zinc), in the lives of humans and animals and in the soils that support plants. This recognition is well deserved because these elements are essential for the life or optimum health of an organism. Some elements such as...
Authors
Larry Gough, Sigrid Asher-Bolinder, Laurie Balistrieri, George Breit, Thomas Casadevall, James Crock, Kimberley Cunningham, Joseph Duval, James Erdman, Barbara Erickson, Walter Ficklin, Larry Jackson, Rama Kotra, Joel Leventhal, James McNeal, William Miller, James Otton, Douglass Owen, Geoffrey Plumlee, G. Reimer, Ronald Severson, Kathleen Smith, Ronald Tidball, Robert Zielinski
SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00 SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00
No abstract available.
Authors
K. Eric Livo, Roger Clark, Daniel Knepper
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993 Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V.J. Grauch, J. D. Phillips, D.B. Hoover, J. Pitkin, K.E. Livo, A. McCafferty
Contrasting P‐T‐t paths: Thermochronologic evidence for a Late Paleozoic final assembly of the Avalon Composite Terrane in the New England Appalachians Contrasting P‐T‐t paths: Thermochronologic evidence for a Late Paleozoic final assembly of the Avalon Composite Terrane in the New England Appalachians
Strongly contrasting pressure‐temperature‐time paths for the Avalon composite terrane and the structurally overlying Putnam‐Nashoba zone in eastern New England obtained from thermochronologic and thermobarometric data are best explained by a late Paleozoic underthrusting of cover rocks by the Avalon composite terrane. We present new Ar and U‐Pb thermochronologic data that show that in...
Authors
R. P. Wintsch, J. Sutter, Michael Kunk, John Aleinikoff, Michael Dorais
Structure of the Reelfoot rift as interpreted from 2-D magnetotelluric models Structure of the Reelfoot rift as interpreted from 2-D magnetotelluric models
The results of magnetotelluric (MT) surveys reveal structures associated with the Reelfoot rift, including an axial high-resistivity structure that may be related to intrusions in the central part of the rift or to a previously unrecognized horst. The axis of this resistivity high generally follows the central part of the Reelfoot rift, but its orientation is offset several degrees from...
Authors
William D. Stanley, Brian Rodriguez
Hydrological, geomorphological, and chemical effects of Hurricane Andrew on coastal marshes of Louisiana Hydrological, geomorphological, and chemical effects of Hurricane Andrew on coastal marshes of Louisiana
Hydrological conditions are reported for the hurricane-induced storm surge at marsh sites in Terrebonne and Barataria Basins. There was a 6 hour or greater delay in the arrival of the storm surge at interior marsh sites compared to coastal locations. A water surge of about 1.5 m with a salinity of 10–15‰ was recorded at an intermediate salinity marsh site in Terrebonne Basin where...
Authors
Larry Jackson, A.L. Foote, Laurie Balistrieri
Rustler Park quadrangle, Cochise County, Arizona— Analytical data and geologic sample catalog Rustler Park quadrangle, Cochise County, Arizona— Analytical data and geologic sample catalog
No abstract available.
Authors
Edward du Bray, Douglas Yager, John Pallister
Evidence for ammonium-bearing minerals on Ceres Evidence for ammonium-bearing minerals on Ceres
Spectra obtained from recent telescopic observation of 1-Ceres and laboratory measurements and theoretical calculations of three component mixtures of Ceres analog material suggest that an ammoniated phyllosilicate is present on the surface of the asteroid, rather than H2O frost as had been previously reported. The presence of an ammoniated phyllosilicate, most likely ammoniated saponite...
Authors
Trude V. V. King, Roger Clark, W. Calvin, David Sherman, R. Brown