Publications
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Interim report on the St. Elias, Alaska earthquake of 28 February 1979 Interim report on the St. Elias, Alaska earthquake of 28 February 1979
On 28 February 1979 an earthquake with surface wave magnitude (Ms) of 7.7 (W. Person, personal communication, 1979) occurred beneath the Chugach and St. Elias mountains of southern Alaska (fig. 1). This is a region of complex tectonics resulting from northwestward convergence between the Pacific and North American plates. To the east, the northwest-trending Fairweather fault accommodates...
Authors
John C. Lahr, George Plafker, C.D. Stephens, K. A. Foglean, M. E. Blackford
Progress on ground motion predictions for the San Francisco Bay region, California Progress on ground motion predictions for the San Francisco Bay region, California
No abstract available.
Authors
Roger D. Borcherdt, J. F. Gibbs, T. E. Fumal
Progress on seismic zonation in the San Francisco Bay region: Introduction and summary Progress on seismic zonation in the San Francisco Bay region: Introduction and summary
No abstract available.
Authors
Earl E. Brabb, Roger D. Borcherdt
A large landslide on Mars A large landslide on Mars
A large landslide deposit on the south wall of Gangis Chasma contains at least 100 billion m3of material that moved 60 km across the trough floor at a speed of more than 100 km/hr. The deposit consists of slump blocks at the head, hummocky material farther out, and a vast apron of longitudinally ridged material extending to the toe. The landslide deposit resembles many terrestrial ones...
Authors
Baerbel K. Lucchitta
Estimating pore and cement volumes in thin section Estimating pore and cement volumes in thin section
Point count estimates of pore, grain and cement volumes from thin sections are inaccurate, often by more than 100 percent, even though they may be surprisingly precise (reproducibility + or - 3 percent). Errors are produced by: 1) inclusion of submicroscopic pore space within solid volume and 2) edge effects caused by grain curvature within a 30-micron thick thin section. Submicroscopic...
Authors
R. B. Halley
Limestone compaction: an enigma: comment and reply Limestone compaction: an enigma: comment and reply
No abstract available.
Authors
S.K. Chanda, Eugene A. Shinn, Robert B. Halley, J. Harold Hudson, Barbara H. Lidz
Factors controlling heavy-mineral variations on the South Texas outer continental shelf, Gulf of Mexico Factors controlling heavy-mineral variations on the South Texas outer continental shelf, Gulf of Mexico
Heavy-mineral distribution on the outer continental shelf off the southern coast of Texas shows regional variability induced by provenance and local variability reflecting genetic differences in sea-floor sediments. Q-mode factor analysis showed that three suites of heavy minerals are present. The southern ancestral Rio Grande delta sediments contain a distinct opaque-pyroxene-garnet...
Authors
R. M. Flores, G. L. Shideler
The Aleutian Basin, Bering Sea a frontier area for hydrocarbon exploration The Aleutian Basin, Bering Sea a frontier area for hydrocarbon exploration
The Aleutian Basin is the deep water (>3000 m) basin that lies north of the Aleutian Islands adjacent to the Bering Sea continental shelf. The basin, about the size of the state of Texas, is underlain by a 2-9 km-thick flat-lying sequence of mostly Cenozoic sediment and rock that includes diatomaceous silty clay interbedded with turbidities in the upper 1 km. Before 1974, geologic and...
Authors
Alan K. Cooper, David W. Scholl, A.F. Marlow, Jonathan R. Childs, George D. Redden, Keith A. Kvenvolden
Coastal processes and morphology of the Bering Sea coast of Alaska Coastal processes and morphology of the Bering Sea coast of Alaska
No abstract available.
Authors
A. H. Sallenger, J.R. Dingler, R. E. Hunter
Age of graben systems on the moon Age of graben systems on the moon
The study focuses on the time of formation of the graben. An attempt is made to determine whether the graben are restricted to geologic units of certain ages, and whether and at what time graben formation ceased. It is shown that (1) most preserved graben formed considerably later than the impacts that formed the basins; (2) graben are faults that are reactivated along older basin...
Authors
Baerbel K. Lucchitta, Jessica A. Watkins
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1978 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1978
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory; therefore it should be regarded as preliminary.
Authors
J.B. Townshend, J.E. Papp, S.P. Tilton
Playback Station #2 for Cal Net and 5-day-recorder tapes Playback Station #2 for Cal Net and 5-day-recorder tapes
A second system (Playback Station #2) has been set up to play back Cal Net 1" tapes and 5-day-recorder 1/2" tapes. As with the first playback system (Playback Station #1) the tapes are played back on a Bell and Howell VR3700B tape deck and the records are written out on a 16-channel direct-writing Siemens "0scillomink." Separate reproduce heads, tape guides, and tape tension sensor...
Authors
Jerry P. Eaton