Publications
Filter Total Items: 1151
Studies in Tertiary stratigraphy of the California Coast Ranges Studies in Tertiary stratigraphy of the California Coast Ranges
The correlation of rocks of Paleogene age in California with those in Europe has had a long and complex history that can only be highlighted here. Kleinpell (1938, p. 168-181), in his classic work defining Miocene benthic1 foraminiferal stages of California, attempted to correlate faunas of California with those of western Europe and elsewhere. He pointed out that rocks usually...
Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado
Workshops were convened by the U.S. Geological Survey to obtain the latest information and concepts relative to defining seismic source zones for five regions of the United States. The zones, with some modifications, have been used in preparation of new national probabilistic ground motion hazard maps by the U.S. Geological Survey. The five regions addressed are the Great Basin, the...
Authors
P.C. Thenhaus, F. A. McKeown, R.C. Bucknam, D. C. Ross, R.E. Anderson, W. P. Irwin, D. P. Russ, W.H. Diment
Geologic and geochronologic reconnaissance of the Turtle Mountains area, California: West border of the Whipple Mountains detachment terrane Geologic and geochronologic reconnaissance of the Turtle Mountains area, California: West border of the Whipple Mountains detachment terrane
No abstract available.
Authors
Keith A. Howard, Paul Stone, M.A. Pernokas, R. F. Marvin
Sedimentation, metamorphism and tectonic accretion of the Franciscan assemblage of northern California Sedimentation, metamorphism and tectonic accretion of the Franciscan assemblage of northern California
No abstract available.
Authors
M. Clark Blake, A. S. Jayko, D. G. Howell
Detached crystalline rocks of the Mohave, Buck, and Bill Williams Mountains, western Arizona Detached crystalline rocks of the Mohave, Buck, and Bill Williams Mountains, western Arizona
No abstract available.
Authors
Keith A. Howard, J. W. Goodge, B.E. John
Regional character of mylonitic gneiss in the Cadiz Valley area, southeastern California Regional character of mylonitic gneiss in the Cadiz Valley area, southeastern California
No abstract available.
Authors
Keith A. Howard, D. M. Miller, B.E. John
Paleomagnetic study of some Cretaceous and Tertiary sedimentary rocks of the Klamath Mountains province, California Paleomagnetic study of some Cretaceous and Tertiary sedimentary rocks of the Klamath Mountains province, California
Paleomagnetic investigation of Cretaceous outliers and Tertiary sedimentary strata of the Klamath Mountains province, and of onlapping Cretaceous strata, has shown the rocks to be largely remagnetized. Samples studied are from the Upper Jurassic to Upper Cretaceous Great Valley sequence, Upper Cretaceous Hornbrook Formation, Eocene Montgomery Creek Formation, and Oligocene(?) Weaverville...
Authors
Edward A. Mankinen, William P. Irwin
Preliminary tectonostratigraphic terrane map of California Preliminary tectonostratigraphic terrane map of California
No abstract available.
Authors
M.C. Blake, D. G. Howell, David Lawrence Jones
Preliminary geology of the Bristol Lake region, Mojave Desert, California Preliminary geology of the Bristol Lake region, Mojave Desert, California
No abstract available.
Authors
D. M. Miller, Keith A. Howard, B.E. John
Paleomagnetic data from the Coso Range, California and current status of the Cobb Mountain normal geomagnetic polarity event Paleomagnetic data from the Coso Range, California and current status of the Cobb Mountain normal geomagnetic polarity event
Two basalt flows which erupted about 1.08 m.y. ago in the Coso Range, California, have normal magnetic polarity and thus provide additional evidence for the Cobb Mountain normal polarity event. A review of available data confirms that this event was of geomagnetic origin. A mean age of 1.10 ± 0.02 m.y. B.P. for the Cobb Mountain normal polarity event was found to best fit all available...
Authors
Edward A. Mankinen, C. Sherman Gromme
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Evaluation of potential surface faulting and other tectonic deformation Evaluation of potential surface faulting and other tectonic deformation
No abstract available.
Authors
M. G. Bonilla
Post 12 m.y. rotation of southwest Washington Post 12 m.y. rotation of southwest Washington
Paleomagnetic field directions from the basalt of Pack Sack Lookout are compared to those from the Pomona Member of the Saddle Mountains Basalt of the Columbia River Basalt Group. The Pomona crops out over a wide region on the Columbia Plateau east of the Cascade Range, and the basalt of Pack Sack Lookout crops out well to the west of the Cascades about 30 to 60 km east of the Washington...
Authors
James R. Magill, Ray E. Wells, Robert W. Simpson, Allan Cox