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: 1862
Natural radionuclides Natural radionuclides
No abstract available.
Authors
D. Kirk Nordstrom, Richard B. Wanty
Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska
Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances commonly have been regarded as a potential unconventional source of natural gas because of their enormous gas-storage capacity. Significant quantities of naturally occurring gas hydrates have...
Authors
Timothy S. Collett
SPECtrum Processing Routines User's Manual Version 3 (program SPECPR) SPECtrum Processing Routines User's Manual Version 3 (program SPECPR)
IntroductionThe 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 N. Clark
The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um) The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um)
We have developed a digital reflectance spectral library, with management and spectral analysis software. The library includes 498 spectra of 444 samples (some samples include a series of grain sizes) measured from approximately 0.2 to 3.0 um . The spectral resolution (Full Width Half Maximum) of the reflectance data is
Authors
Roger N. Clark, Gregg A. Swayze, Andrea J. Gallagher, Trude V.V. King, Wendy M. Calvin
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 P. Gough, Sigrid Asher-Bolinder, Laurie S. Balistrieri, George N. Breit, Thomas J. Casadevall, James G. Crock, Kimberley I. Cunningham, Joseph S. Duval, James A. Erdman, Barbara M. Erickson, Walter H. Ficklin, Larry L. Jackson, Rama K. Kotra, Joel S. Leventhal, James M. McNeal, William R. Miller, James K. Otton, Douglass E. Owen, Geoffrey S. Plumlee, G. Michael Reimer, Ronald C. Severson, Kathleen S. Smith, Ronald R. Tidball, Robert A. Zielinski
Petrology and U-Pb geochronology of buried Avalonian plutonic rocks on southeastern Cape Cod Petrology and U-Pb geochronology of buried Avalonian plutonic rocks on southeastern Cape Cod
Plutonic rocks have been intersected by two separate drill holes on southeastern Cape Cod. Hole CC2 is located at Chatham Harbor about 7 km south of the Nauset anomaly, an east-northeast-trending magnetic lineament that was considered to separate the distinct plutonic zones of Avalon terrane. This drill hole intersected weakly foliated, fairly homogeneous biotite granite. Zircons from...
Authors
G. W. Leo, J.K. Mortensen, B. Barreiro, J. D. Phillips
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 N. Clark, Daniel H. Knepper
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 N. Clark, Daniel H. Knepper
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. M. Calvin, R. N. Clark
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.A. Pitkin, K.E. Livo, A. E. McCafferty
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.A. Pitkin, K.E. Livo, A. E. McCafferty
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.A. Pitkin, K.E. Livo, A. E. McCafferty