Publications
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Landslides in the vicinity of the Fort Randall Reservoir, South Dakota Landslides in the vicinity of the Fort Randall Reservoir, South Dakota
No abstract available.
Authors
Christopher F. Erskine
Geological, geophysical, and engineering investigations of the Loveland Basin landslide, Clear Creek County, Colorado, 1963-65 Geological, geophysical, and engineering investigations of the Loveland Basin landslide, Clear Creek County, Colorado, 1963-65
No abstract available.
Authors
Charles Sherwood Robinson, Fitzhugh T. Lee, R.W. Moore, R. D. Carroll, J. H. Scott, J.D. Post, C. S. Robinson, R.A. Bohman
Pacific geomagnetic secular variation Pacific geomagnetic secular variation
We have considered several different types of records of long-period geomagnetic secular variation: direct measurements made in geomagnetic observatories; paleomagnetic measurements on Hawaiian lava flows with accurately known ages in the interval 0 to 200 years; paleomagentic measurements on Hawaiian lava flows with loosely determined ages within the interval 200 to 10,000 years ago...
Authors
Richard R. Doell, A. Cox
Estimated relative abundance of landslides in the San Francisco Bay region, California Estimated relative abundance of landslides in the San Francisco Bay region, California
No abstract available.
Authors
D. H. Radbruch-Hall, C. M. Wentworth
Preliminary photointerpretation and damage maps of landslide and other surficial deposits in northeastern San Jose, California Preliminary photointerpretation and damage maps of landslide and other surficial deposits in northeastern San Jose, California
No abstract available.
Authors
T. H. Nilsen, E. E. Brabb
Geomagnetic polarity epochs: age and duration of the olduvai normal polarity event 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 the Olduvai event. The lava from which the
Authors
C. S. Grommé, R. L. Hay
Map showing relative amounts of landslides in California Map showing relative amounts of landslides in California
No abstract available.
Authors
Dorothy H. Radbruch, Kenneth C. Crowther
A computer program to trace seismic ray distribution in complex two-dimensional geological models 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 and elastic parameter for the elastic...
Authors
Nazieh K. Yacoub, James H. Scott
History of the geomagnetic field History of the geomagnetic field
Direct measurements of the direction and strength of the earth's magnetic field have provided a knowledge of the field's form and behavior during the last few hundreds of years. For older times, however, it has been necessary to measure the magnetism of certain rocks to learn what the geomagnetic field was like. For example, when a lava flow solidifies (at temperatures near 1000°C) and...
Authors
Richard R. Doell