Geologic Hazards Science Center

Publications

Filter Total Items: 2,058
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Year Published: 1972

Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Altamont and Carbona 15-minute quadrangles, Alameda County, California

Nilsen, T.H.
Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Altamont and Carbona 15-minute quadrangles, Alameda County, California; 1972; MF; 321; Nilsen, T. H.

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Year Published: 1972

Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Los Gatos, Morgan Hill, Gilroy Hot Springs, Pacheco Pass, Quien Sabe, and Hollister 15-minute quadrangles, Santa Clara County, California

Nilsen, T.H.
Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Los Gatos, Morgan Hill, Gilroy Hot Springs, Pacheco Pass, Quien Sabe, and Hollister 15-minute quadrangles, Santa Clara County, California; 1972; MF; 416; Nilsen, T. H.

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Year Published: 1972

Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Pittsburg and Rio Vista 15-minute quadrangles, Contra Costa and Solano Counties, California

Sims, J.D.; Nilsen, T.H.
Preliminary photointerpretation map of landslide and other surficial deposits of parts of the Pittsburg and Rio Vista 15-minute quadrangles, Contra Costa and Solano Counties, California; 1972; MF; 322; Sims, J. D.; Nilsen, T. H.

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Year Published: 1972

Preliminary photointerpretation map of landslide and other surficial deposits of the Byron area, Contra Costa and Alameda Counties, California

Nilsen, T.H.
Preliminary photointerpretation map of landslide and other surficial deposits of the Byron area, Contra Costa and Alameda Counties, California; 1972; MF; 338; Nilsen, T. H.

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Year Published: 1972

Preliminary photointerpretation map of landslide and other surficial deposits of the Mount Hamilton quadrangle and parts of the Mount Boardman and San Jose quadrangles, Alameda and Santa Clara Counties, California

The nine San Francisco Bay region counties lie within a geologically active, young, and dynamic part of the central and northern Coast Ranges of California. Significant movements of the earth's crust are occurring here at the present time, posing numerous problems to urbanization, including some of special concern. Geological processes such as...

Nilsen, Tor H.
Preliminary photointerpretation map of landslide and other surficial deposits of the Mount Hamilton quadrangle and parts of the Mount Boardman and San Jose quadrangles, Alameda and Santa Clara Counties, California; 1972; MF; 339; Nilsen, T. H.

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Year Published: 1971

Estimated relative abundance of landslides in the San Francisco Bay region, California

Radbruch-Hall, D. H.; Wentworth, C. M.
Estimated relative abundance of landslides in the San Francisco Bay region, California; 1971; OFR; 71-231; Radbruch-Hall, D. H.; Wentworth, C. M.

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Year Published: 1971

Preliminary map of landslide deposits in the Green Mountain area, Jefferson County, Colorado

Scott, Glenn R.
Preliminary map of landslide deposits in the Green Mountain area, Jefferson County, Colorado; 1971; OFR; 71-252; Scott, Glenn Robert

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Year Published: 1971

Preliminary photointerpretation and damage maps of landslide and other surficial deposits in northeastern San Jose, Santa Clara County, California

Nilsen, T.H.; Brabb, E.E.
Preliminary photointerpretation and damage maps of landslide and other surficial deposits in northeastern San Jose, Santa Clara County, California; 1971; OFR; 71-217; Nilsen, T. H.; Brabb, E. E.

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Year Published: 1971

Preliminary photointerpretation map of landslide and other surficial deposits of the Mount Diablo area, Contra Costa and Alameda Counties, California

The map shows the distribution of landslide and other surficial deposits by presenting the writer's best judgement regarding the origins of the various parts of the present landscape. It is based completely on the interpretation of aerial photographs through a stereoscope, which permits a three-dimentional relief model of the ground surface to be...

Nilsen, Tor H.
Preliminary photointerpretation map of landslide and other surficial deposits of the Mount Diablo area, Contra Costa and Alameda Counties, California; 1971; MF; 310; Nilsen, T. H.

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Year Published: 1971

Geomagnetic polarity epochs: age and duration of the olduvai normal polarity event

New data show that the Olduvai normal geomagnetic polarity event is represented in Olduvai Gorge, Tanzania, by rocks covering a time span of roughly from 0.1 to 0.2 my and is no older than 2.0 my. Hence the long normal polarity event of this age that is seen in deep-sea sediment cores and in magnetic profiles over oceanic ridges should be called...

Gromme, C.S.; Hay, R.L.

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Year Published: 1971

Pacific geomagnetic secular variation

A smooth field over the central Pacific for a million years indicates a nonuniform lower mantle of the earth.

Doell, Richard R.; Cox, A.
Pacific geomagnetic secular variation; 1971; Article; Journal; Science; Doell, R. R.; Cox, A.

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Year Published: 1970

A computer program to trace seismic ray distribution in complex two-dimensional geological models

A computer program has been developed to trace seismic rays and their amplitudes and energies through complex two-dimensional geological models, for which boundaries between elastic units are defined by a series of digitized X-, Y-coordinate values. Input data for the program includes problem identification, control parameters, model coordinates...

Yacoub, Nazieh K.; Scott, James H.
A computer program to trace seismic ray distribution in complex two-dimensional geological models; 1970; USGS Unnumbered Series; Yacoub, Nazieh K.; Scott, James H.