Publications
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Geodolite measurements of deformation near Hollister, California, 1971-1978
A 24‐station trilateration network spanning the San Andreas and Calaveras faults near Hollister, California, has been surveyed each year between 1971 and 1978, inclusive. Two moderate (ML = 5) earthquakes have occurred within the network during the interval. No convincing preseismic or coseismic anomalies associated with those earthquakes have been identified. The deformation of the network can be
Authors
James C. Savage, W. H. Prescott, Michael Lisowski, N. King
Deformation across the Salton Trough, California, 1973-1977
A trilateration network extending across the San Andreas, San Jacinto, and Elsinore faults in the vicinity of the Salton Sea, California, has been surveyed to very high precision several times in the 5‐year interval 1973–1977. The average strain across the entire network is essentially a uniaxial north‐south contraction at the rate of about 0.3 μstrain/a. There is no substantial strain perpendicul
Authors
James C. Savage, W. H. Prescott, Michael Lisowski, N. King
Strain accumulation rates in the western United States between 1970 and 1978
The rate of dilatation and the rate and direction of shear have been determined from trilateration data for 23 Geodolite networks in the western United States. Sixteen nets are located along the San Andreas fault system between Point Reyes, California, and the United States‐Mexico border. Other locations are across the Garlock fault in California; across Puget Sound near Seattle, Washington; near
Authors
W. H. Prescott, James C. Savage, W. T. Kinoshita
Geodimeter measurements of strain during the Southern California Uplift
A review of geodimeter measurements made along the ‘big‐bend’ section of the San Andreas fault in southern California indicates no significant increment in strain during the period of major uplift (late 1959 to mid‐1963). Specifically, no evidence of an increment in compressional strain normal to the San Andreas fault at the time of the uplift was found. Geodolite measurements at four networks alo
Authors
James C. Savage, W. H. Prescott
Coastal processes and morphology of the Bering Sea coast of Alaska
No abstract available.
Authors
A. H. Sallenger, J. R. Dingler
Fresh-water cementation of a 1,000-year-old oolite
Calcite cementation of aragonite ooid sand is producing oolite on Joulters Cays, Bahamas. During the last 1,000 years, calcite cement has formed at an average rate of between 27 and 55 cm3 /m3 /yr and is derived from dissolution of ooid aragonite in fresh water. The dissolution-reprecipitation of carbonate minerals in the aquifer results in ground waters of unusually high Sr content. Sea water and
Authors
R. B. Halley, P. M. Harris
Compressional velocities from multichannel refraction arrivals on Georges Bank: northwest Atlantic Ocean
Velocities were obtained from unreversed, refracted arrivals on analog records from a 48‐channel, 3.6-km hydrophone cable (3.89 km from the airgun array to the last hydrophone array). Approximately 200 records were analyzed along 1500 km of ship track on Georges Bank, northwest Atlantic Ocean, to obtain regional sediment velocity distribution to a depth of 1.4 km below sea level. This technique pr
Authors
L. D. McGinnis, R. M. Otis
Inverse grading and hydraulic equivalence in grain-flow deposits
Inversely graded grain-flow deposits are characterized by a hydraulic equivalence that differs from that based on settling velocities or entrainment. Dispersive equivalence, derived from the dispersive pressure hypothesis on how inverse grading develops, was found to agree reasonably well with observed relationships between grain sizes and densities in grain-flow deposits. Furthermore, observed re
Authors
A. H. Sallenger
Endolith microborings and their preservation in Holocene-Pleistocene (Bahama-Florida) ooids
Holocene ooids from Joulters Ooid Shoal (Bahamas) are bored in various ways by blue-green algae that groove along the grain surface, reside just beneath the grain surface, and tunnel extensively a few tens of microns within the grain. The microborings, morphologically distinctive, are documented with scanning electron micrographs of open borings and resin casts. Gentle dissolution of ooid aragonit
Authors
Paul M. Harris, Robert B. Halley, Karen J. Lukas
Altitude-age relationships of the lunar maria
Altitudes and relative ages of mare surface units were compared to test if a systematic correlation in height of lava eruption surfaces and age might reflect a corresponding increase in depth of the magma chamber with time; in addition the altitudes were studied to shed light on the time and place of warping of mare surfaces. The laser altimeter data from the Apollo missions and relative age data
Authors
Baerbel K. Lucchitta, J. M. Boyce