Publications
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Dolomitization in a mixing zone of near-seawater composition, Late Pleistocene, northeastern Yucatan Peninsula
Patches of dolomite occur in cores of reefal limestone from the shallow subsurface on the northeastern coast of the Yucatan Peninsula. This limestone accumulated during an interglacial high stand of sea level about 200,000 years ago. Dolomitization was preceded by freshwater diagenesis, including precipitation of sparry calcite cement, stabilization of Mg-calcitic skeletal fragments, and partial d
Authors
W. C. Ward, Robert B. Halley
A note on the effect of bottom currents on an ocean bottom seismometer
Two three-component ocean bottom seismometers and a current meter were deployed a few hundred meters apart on the southern Blake Plateau off the United States eastern coast to study the effect of near-bottom currents on the background noise level of seismometers. Although analysis of the data is limited somewhat by instrumental problems, the increase in current speed, which ranged from 2 to 25 cm/
Authors
Anne M. Tréhu
An assessment of the near-surface accuracy of the international geomagnetic reference field 1980 model of the main geomagnetic field
The new International Geomagnetic Reference Field (IGRF) model of the main geomagnetic field for 1980 is based heavily on measurements from the MAGSAT satellite survey. Assessment of the accuracy of the new model, as a description of the main field near the Earth's surface, is important because the accuracy of models derived from satellite data can be adversely affected by the magnetic field of el
Authors
N. W. Peddie, A. K. Zunde
Preliminary response activities and recommendations of the USGS Landslide Hazard Research Team to the Puerto Rico landslide disaster of October 7, 1985
No abstract available.
Authors
R. H. Campbell, D.G. Herd, R.M. Alonso
Bibliography of United States landslide maps and reports
No abstract available.
Authors
C.S. Alger, E. E. Brabb
Feasibility of a nationwide program for the identification and delineation of hazards from mud flows and other landslides; Chapter D, The Economics of landslide mitigation strategies in Cincinnati, Ohio : a methodology for benefit-cost analysis
No abstract available.
Authors
Richard L. Bernknopf, David S. Brookshire, Russell H. Campbell, Carl D. Shapiro, Robert W. Fleming
Impact on the Columbia River of an outburst of Spirit Lake
A one-dimensional sediment-transport computer model was used to study the effects of an outburst of Spirit Lake on the Columbia River. According to the model, flood sediment discharge to the Columbia from the Cowlitz would form a blockage to a height of 44 feet above the current streambed of the Columbia River, corresponding to a new streambed elevation of -3 feet, that would impound the waters of
Authors
W. G. Sikonia
Crustal refraction profile of the Long Valley caldera, California, from the January 1983 Mammoth Lakes earthquake swarm
Seismic-refraction profiles recorded north of Mammoth Lakes, California, using earthquake sources from the January 1983 swarm complement earlier explosion refraction profiles and provide velocity information from deeper in the crust in the area of the Long Valley caldera. Eight earthquakes from a depth range of 4.9 to 8.0 km confirm the observation of basement rocks with seismic velocities ranging
Authors
James H. Luetgert, Walter D. Mooney
Crustal structure of the southern Calaveras fault zone, central California, from seismic refraction investigations
A magnitude 5.7 earthquake on 6 August 1979, within the Calaveras fault zone, near Coyote Lake of west-central California, motivated a seismic-refraction investigation in this area. A northwest-southeast profile along the fault, as well as two fan profiles across the fault were recorded to examine the velocity structure of this region.The analysis of the data reveals a complicated upper crustal ve
Authors
Peter Blumling, Walter D. Mooney, William H. K. Lee
A seismic-refraction profile across the San Andreas, Sargent, and Calaveras faults, west-central California
In 1981, the United States Geological Survey recorded a seismic-refraction profile across the southern Santa Cruz Mountains in west-central California to examine the shallow velocity structure of this seismogenic region. This 40-km-long profile, which consisted of three shotpoints, extended northeastward from near Watsonville, California, to Coyote Lake, crossing the San Andreas, Sargent, and Cala
Authors
Walter D. Mooney, Robert H. Colburn
In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York
Hydraulic fracturing stress measurements and a borehole televiewer survey were conducted in a 1.6‐km‐deep well at Auburn, New York. This well, which was drilled at the outer margin of the Appalachian Fold and Thrust Belt in the Appalachian Plateau, penetrates approximately 1540 m of lower Paleozoic sedimentary rocks and terminates 60 m into the Precambrian marble basement. Analysis of the hydrauli
Authors
Stephen H. Hickman, John H. Healy, Mark D. Zoback
A general earthquake-observation system (GEOS)
Microprocessor technology has permitted the development of a General Earthquake-Observation System (GEOS) useful for most seismic applications. Central-processing-unit control via robust software of system functions that are isolated on hardware modules permits field adaptability of the system to a wide variety of active and passive seismic experiments and straightforward modification for incorpor
Authors
R. D. Borcherdt, Joe B. Fletcher, E.G. Jensen, G.L. Maxwell, J.R. VanSchaack, R.E. Warrick, E. Cranswick, M.J.S. Johnston, R. McClearn