Publications
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Peritidal lithologies of Cambrian carbonate islands, Carrara Formation, southern Great Basin
The Carrara Formation is a heterogeneous sequence of quartzites, siltstones, shales, limestones, dolostones, and mixed terrigenous-carbonate rocks. It is Early and Middle Cambrian in age (Stewart, 1970; Palmer, 1971). Figure 32-1 illustrates the general distribution of Carrara lithologies along a transect approximately normal to depositional strike (Fig. 32-2). The formation contains three “grand
Authors
Robert B. Halley
Probable effects of the Leviathan Creek basin landslide, Alpine County, California
No abstract available.
Authors
Patrick A. Glancy, T.J. Katzer
Notes on some experiments on the application of subtractive compensation to USGS seismic magnetic tape recording and playback systems
The purpose of these experiments is to lay the groundwork for the implementation of subtractive compensation of the USGS seismic network tape playbacks utilizing the Develco model 6203 discriminators at a x1 playback speed. Although the Develco discriminators were designed for this application and a matching Develco compensation discriminator was purchased, effective use of this system for subtrac
Authors
Jerry P. Eaton
Earthquake mechanism and displacement fields close to fault zones: Report on the Sixth GEOP Research Conference
The Sixth Geodesy/Solid Earth and Ocean Physics (GEOP) Research Conwas held on February 4–5, 1974, at the Institute of Geophysics and Planetary Physics, University of California, San Diego, in La Jolla, California. It was attended by about 100 persons.James N. Brune, program chairman, opened the conference and delivered the introductory address, a somewhat extended version of which is printed else
Authors
Craig R. Allen, Jon Berger, Ivan I. Mueller, James C. Savage, J. Weertman
Geodetic determination of strain at the Nevada Test Site following the Handley event
Repeated surveys of a trilateration network (aperture greater than 20 km) centered on ground zero for the HANDLEY event, a nuclear explosion at the Nevada Test Site with yield in excess of 1 megaton, suggest that the explosion induced an east-west extension of the network by more than 50 mm. In the year following the detonation, this deformation reversed such that the final configuration represent
Authors
James C. Savage, W. T. Kinoshita, W. H. Prescott
Effects of the Bear Valley and San Juan Bautista earthquakes of 1972 on Geodimeter line lengths
Measurements of lines of the California Geodimeter network in the vicinity of the epicenters of four 1972 earthquakes (magnitudes 4.7, 4.7, 4.8, and 5.1) along the San Andreas fault system indicate that no significant anomalous changes in line length preceded or accompanied those earthquakes. Within the precision of measurement, the data are consistent with a linear change in line length with time
Authors
W. H. Prescott, James C. Savage
Geophysical observations on northern part of Georges Bank and adjacent basins of Gulf of Maine
Continuous-seismic-reflection and magnetic-intensity profiles provide data for inferences about the geology of the northern part of Georges Bank and the basins of the Gulf of Maine adjacent to the bank.Basement is inferred to be mostly sedimentary and volcanic rocks of Paleozoic age that were metamorphosed and intruded locally by felsic and mafic plutons near the end of the Paleozoic Era. During L
Authors
R. N. Oldale, J. C. Hathaway, William P. Dillon, J. D. Hendricks, James M. Robb
North polar region of Mars: Imaging results from Viking 2
During October 1976, the Viking 2 orbiter acquired approximately 700 high-resolution images of the north polar region of Mars. These images confirm the existence at the north pole of extensive layered deposits largely covered over with deposits of perennial ice. An unconformity within the layered deposits suggests a complex history of climate change during their time of deposition. A pole-girdling
Authors
J.A. Cutts, K.R. Blasius, G.A. Briggs, M. H. Carr, Ronald Greeley, Harold Masursky
Simulated “true color” images from ERTS data
No abstract available.
Authors
Eric M. Eliason, Pat S. Chavez, Laurence A. Soderblom
Orange material in the Sulpicius Gallus formation at the southwestern edge of Mare Serenitatis
Orange and red materials were observed and photographed in the dark mantle of the Sulpicius Gallus Formation on the southwestern rim of the Serenitatis basin. These materials occur only within the dark mantle that overlies old rilled mare and highland units and are absent on the younger mare unit in this area. Orange and red materials occur predominantly as halos, patches, or rays around fresh imp
Authors
Baerbel K. Lucchitta, H.H. Schmitt
Tectonic significance of the Kodiak-Bowie seamount chain, northeastern Pacific
The hypothesis of a fixed melting spot reference frame (M) for relative plate motion is tested in the northeastern Pacific Ocean, where the Kodiak-Bowie seamount chain intersects the northern triple junction between the Pacific, American, and Juan de Fuca plates. Available age determinations on Kodiak and Giacomini Seamounts provide an estimated average rate of volcanic propagation along the chain
Authors
Eli A. Silver, Roland E. von Huene, James K. Crouch
Interstitial water studies on small core samples, Leg 22
Interstitial waters from Leg 22 in the Indian Ocean revealed two unique results: Site 214, on the Ninetyeast Ridge, penetrated through a 30-meter sequence of fine-grained basalt and reentered hard, silty clay containing carbonate skeletal debris. Such a basalt layer may well have been impervious and extensive enough to seal off underlying (fossil) seawater of Paleocene age. However, except for a m
Authors
Frank T. Manheim, Lee S. Waterman, Frederick L. Sayles