Publications
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Methodology for predictive GIS mapping of special study zones for strong ground shaking in the San Francisco Bay region, California Methodology for predictive GIS mapping of special study zones for strong ground shaking in the San Francisco Bay region, California
No abstract available.
Authors
Roger D. Borcherdt, Carl M. Wentworth, A. Janssen, T. Fumal, J. Gibbs
Application of GIS technology to seismic zonation of the San Francisco Bay region, California Application of GIS technology to seismic zonation of the San Francisco Bay region, California
No abstract available.
Authors
Carl M. Wentworth, Roger D. Borcherdt, T.T. Fitzgibbon, P. K. Showalter
Comparative observation of soil amplification from long-period micro tremor and earthquake recordings for seismic microzonation Comparative observation of soil amplification from long-period micro tremor and earthquake recordings for seismic microzonation
No abstract available.
Authors
Hiroyuki Kameda, Mehmet Celebi, Roger D. Borcherdt, Junpei Akamatsu, M. Fujita
Archean and Proterozoic crustal evolution: Evidence from crustal seismology Archean and Proterozoic crustal evolution: Evidence from crustal seismology
Seismic-velocity models for Archean and Proterozoic provinces throughout the world are analyzed. The thickness of the crust in Archean provinces is generally found to be about 35 km (except at collisional boundaries), whereas Proterozoic crust has a significantly greater thickness of about 45 km and has a substantially thicker high-velocity (>7.0 km/s) layer at the base. We consider two...
Authors
R. Durrheim, Walter D. Mooney
Basin and range crustal and upper mantle structure, northwest to central Nevada Basin and range crustal and upper mantle structure, northwest to central Nevada
We present an interpretation of the crustal and uppermost mantle structure of the Basin and Range of northwestern Nevada based on seismic refraction/wide‐angle reflection, near‐vertical reflection, and gravity data. In comparison to most previous estimates, we find that the crust is somewhat thicker (32–36 km versus 22–30 km), and the uppermost mantle velocity is somewhat higher (8.0 km...
Authors
Rufus D. Catchings, Walter D. Mooney
Probing the Earth's strength: Can we measure small stress at high pressure? Probing the Earth's strength: Can we measure small stress at high pressure?
Simulating the conditions and processes that occur in the Earth's deep interior has been a major goal of experimental geophysics since the 1920s. In particular, pioneers such as P. W. Bridgman, David Griggs, Hugh Heard, Mervyn Paterson, William Brace, and their colleagues sought to establish the basic relations between differential stresses and rock and mineral deformation under pressure
Authors
A. Kronenberg, Stephen H. Kirby
Sonobuoy seismic studies at ODP drill sites in Prydz Bay, Antarctica Sonobuoy seismic studies at ODP drill sites in Prydz Bay, Antarctica
Five sonobuoy seismic-refraction records were collected along the Leg 119 geophysical transect across the Prydz Bay shelf. Velocity-depth profiles are computed from the sonobuoy data and are used to produce a depth section for the principal acoustic unit boundaries observed in the seismic-reflection data along the transect. Traveltime curves generated by ray-tracing for models...
Authors
Guy R. Cochrane, Alan K. Cooper
Seismic stratigraphy and structure of Prydz Bay, Antarctica: Implications from Leg 119 drilling Seismic stratigraphy and structure of Prydz Bay, Antarctica: Implications from Leg 119 drilling
Prydz Bay is situated on the MacRobertson Land coast of East Antarctica at the seaward end of a 700-km-long transverse rift zone, the Lambert Rift. New and reprocessed seismic reflection data are combined with drilling results from five Leg 119 sites across Prydz Bay to study the regional stratigraphy and structure of the continental shelf and upper slope. Severe seismic multiples hamper
Authors
Alan K. Cooper, Howard Stagg, Eric L. Geist
Quaternary history of some southern and central Rocky Mountain basins Quaternary history of some southern and central Rocky Mountain basins
This chapter summarizes the current state of late Cenozoic stratigraphic knowledge in some Rocky Mountain basins (here defined as the structurally low portions of major drainage basins) that have been studied in detail since Scott’s (1965) summary on the nonglacial history of the southern and middle Rocky Mountains. The Quaternary history of few of these basins has been studied as...
Authors
Marith C. Reheis, Robert C. Palmquist, S.S. Agard, Cheryl Jaworowski, Brainerd Mears, Richard F. Madole, Alan R. Nelson, Gerald Osborn
Preliminary map of landslide features and coseismic fissures in the Summit Road area of the Santa Cruz Mountains triggered by the Loma Prieta earthquake of October 17, 1989 Preliminary map of landslide features and coseismic fissures in the Summit Road area of the Santa Cruz Mountains triggered by the Loma Prieta earthquake of October 17, 1989
No abstract available.
Authors
T. E. Spittler, E. L. Harp
Publications of the Branch of Atlantic Marine Geology for Calendar Year 1990 Publications of the Branch of Atlantic Marine Geology for Calendar Year 1990
This U.S. Geological Survey Open-File Report [extract] contains a listing of publications authored or co-authored by members of the Branch of Atlantic Marine Geology and published in calendar year 1990. The Branch conducts a broad geologic and geophysical research and mapping program, primarily along the U.S. Atlantic Margin, in the Great Lakes, the Gulf of Mexico, the Caribbean and...
Authors
Margaret C. Mons-Wengler, Robert N. Oldale
An automatic, quasi-absolute, geomagnetic calibration system An automatic, quasi-absolute, geomagnetic calibration system
No abstract available.
Authors
E.A. Sauter