Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2486
Revised geomagnetic polarity time scale for the interval 0–5 m.y. B.P. Revised geomagnetic polarity time scale for the interval 0–5 m.y. B.P.
A change in the constants used in K‐Ar dating and a significant increase in new data have made a recompilation and recomputation of data used to define the Late Cenozoic K‐Ar polarity time scale highly desirable at this time. All available data in the range 0–5 m.y. have been recalculated using the refined constants, with 354 data points in this time interval now meeting the minimum...
Authors
Edward A. Mankinen, G. Brent Dalrymple
By
Geomagnetic paleointensities by the Thelliers' method from submarine pillow basalts: Effects of seafloor weathering Geomagnetic paleointensities by the Thelliers' method from submarine pillow basalts: Effects of seafloor weathering
Measurements of geomagnetic paleointensity using the Thelliers' double‐heating method in vacuum have been made on 10 specimens of submarine pillow basalt obtained from 7 fragments dredged from localities 700,000 years old or younger. In the magnetic minerals, the titanium/iron ratio parameter x and the cation deficiency (oxidation) parameter x were determined by X‐ray diffraction and...
Authors
Sherman Gromme, Edward A. Mankinen, Monte Marshall, Robert S. Coe
By
Proceedings of Conference VIII: Analysis of actual fault zones in bedrock: Convened under auspices of National Earthquake Hazards Reduction Program, 1-5 April 1979 Proceedings of Conference VIII: Analysis of actual fault zones in bedrock: Convened under auspices of National Earthquake Hazards Reduction Program, 1-5 April 1979
No abstract available.
Authors
Robert Speed, Robert Sharp, Jack F. Evernden
Evidence for tectonic movement of the Las Positas Fault, Alameda County, California Evidence for tectonic movement of the Las Positas Fault, Alameda County, California
On October 29, 1979, a new exposure of the Las Positas fault zone near Livermore, California, was created by excavation of a creek bank along Arroyo Seco. The face of the bank was cleaned by geologists of Lawrence Livermore Laboratory (Livermore, California) to obtain a better and more complete view of the fault. The excavation was undertaken by Lawrence Livermore Laboratory as part of a...
Authors
Darrell G. Herd, Earl E. Brabb
Bouguer gravity map of the Bangor 1° x 2° quadrangle, Maine Bouguer gravity map of the Bangor 1° x 2° quadrangle, Maine
No abstract available.
Authors
Robert W. Simpson, Wallace A. Bothner, Dennis S. Hodge
Base and precious metal occurrences along the San Andreas Fault, Point Delgada, California Base and precious metal occurrences along the San Andreas Fault, Point Delgada, California
Previously unrecognized veins containing lead, zinc, and copper sulfide minerals at Point Delgada, Calif., are associated with late Mesozoic(?) and Tertiary volcanic and sedimentary rocks of the Franciscan assemblage. Sulfide minerals include pyrite, sphalerite, galena, and minor chalcopyrite, and galena-rich samples contain substantial amounts of silver. These minerals occur in a quartz...
Authors
Robert J. McLaughlin, D. H. Sorg, H.N. Ohlin, Chris Heropoulos
Geological Survey research 1979 Geological Survey research 1979
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Progress on seismic zonation in the San Francisco Bay region Progress on seismic zonation in the San Francisco Bay region
No abstract available.
Authors
Earl E. Brabb
Early Cretaceous metamorphic age of the South Fork Mountain Schist in the northern Coast Ranges of California Early Cretaceous metamorphic age of the South Fork Mountain Schist in the northern Coast Ranges of California
No abstract available.
Authors
Marvin A. Lanphere, M. Clark Blake, W. P. Irwin
Apollo over the Moon: A view from orbit Apollo over the Moon: A view from orbit
No abstract available.
Authors
Harold Masursky, G. W. Colton, Farouk El-Baz, Frederick J. Doyle, Richard E. Eggleton, Maurice J. Grolier, James W. Head, Carroll Ann Hodges, Keith A. Howard, Leon J. Kosofsky, Baerbel K. Lucchitta, Michael C. McEwen, Henry J. Moore, Gerald G. Schaber, David H. Scott, Laurence A. Soderblom, Mareta West, D.E. Wilhems
Examples of seismic zonation in the San Francisco Bay region Examples of seismic zonation in the San Francisco Bay region
No abstract available.
Authors
W. J. Kockelman, E. E. Brabb