Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2481
Well bore breakouts and in situ stress Well bore breakouts and in situ stress
The detailed cross-sectional shape of stress induced well bore breakouts has been studied using specially processed ultrasonic borehole televiewer data. Breakout shapes are shown for a variety of rock types and introduce a simple elastic failure model which explains many features of the observations. Both the observations and calculations indicate that the breakouts define relatively...
Authors
Mark D. Zoback, Daniel Moos, Larry Mastin, Roger N. Anderson
The Steens Mountain (Oregon) geomagnetic polarity transition: 1. Directional history, duration of episodes, and rock magnetism The Steens Mountain (Oregon) geomagnetic polarity transition: 1. Directional history, duration of episodes, and rock magnetism
The thick sequence of Miocene lava flows exposed on Steens Mountain in southeastern Oregon is well known for containing a detailed record of a reversed‐to‐normal geomagnetic polarity transition. Paleomagnetic samples were obtained from the sequence for a combined study of the directional and intensity variations recorded; the paleointensity study is reported in a companion paper. This...
Authors
Edward A. Mankinen, M. Prevot, C. Sherman Gromme, Robert S. Coe
By
Bibliography of United States landslide maps and reports Bibliography of United States landslide maps and reports
No abstract available.
Authors
C.S. Alger, E. E. Brabb
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York
Hydraulic fracturing stress measurements and a borehole televiewer survey were conducted in a 1.6‐km‐deep well at Auburn, New York. This well, which was drilled at the outer margin of the Appalachian Fold and Thrust Belt in the Appalachian Plateau, penetrates approximately 1540 m of lower Paleozoic sedimentary rocks and terminates 60 m into the Precambrian marble basement. Analysis of...
Authors
Stephen H. Hickman, John H. Healy, Mark D. Zoback
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Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon
No abstract available.
Authors
E. A. Mankinen, W. P. Irwin, C. S. Grommé
Correlation of metamorphosed Paleozoic strata of the southeastern Mojave Desert region, California and Arizona: Discussion and reply Correlation of metamorphosed Paleozoic strata of the southeastern Mojave Desert region, California and Arizona: Discussion and reply
No abstract available.
Authors
H.J. Brown, Paul Stone, Keith A. Howard, Warren Hamilton
Bibliography of alluvial-fan deposits Bibliography of alluvial-fan deposits
No abstract available.
Authors
T. H. Nilsen, Thomas E. Moore
Canyon-filling lavas and lava dams on the Boise River, Idaho, and their significance for evaluating downcutting during the last 2 million years Canyon-filling lavas and lava dams on the Boise River, Idaho, and their significance for evaluating downcutting during the last 2 million years
Basalts that periodically dammed the Boise River and its South Fork over the last 2 million years reveal the canyon history and illustrate how lava interacted with impounded river water. Intracanyon basalt flows record a granite canyon successively filled by lava and then recut at least five times in the last 2 million years. The most voluminous flow, Steamboat Rock Basalt, reached 60...
Authors
Keith A. Howard, John W. Shervais, E.H. McKee
Geology of Point Reyes Peninsula and implications for San Gregorio fault history Geology of Point Reyes Peninsula and implications for San Gregorio fault history
No abstract available.
Authors
J. C. Clark, E. E. Brabb, H. G. Greene, D. C. Ross
Sedimentary petrology of graywacke of the Franciscan Complex in the northern San Francisco Bay Area, California Sedimentary petrology of graywacke of the Franciscan Complex in the northern San Francisco Bay Area, California
No abstract available.
Authors
A. S. Jayko, M. Clark Blake
Innovative approaches to landslide hazard and risk mapping Innovative approaches to landslide hazard and risk mapping
No abstract available.
Authors
E. E. Brabb
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center