Publications
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Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Landslides triggered by earthquakes in the central Mississippi Valley, Tennessee and Kentucky Landslides triggered by earthquakes in the central Mississippi Valley, Tennessee and Kentucky
We mapped 221 large (more than 200 ft across) landslides of three morphologically distinct types on the bluffs bordering the Mississippi alluvial plain in western Tennessee and Kentucky Old coherent slides (146 landslides, or 66 percent of the total) include translational block slides and single and multiple-block rotational slumps, all of which are covered by mature vegetation and have...
Authors
Randall W. Jibson, David K. Keefer
Carbonate to siliciclastic periplatform sediments: southwest Florida Carbonate to siliciclastic periplatform sediments: southwest Florida
Three distinct carbonate deposits have been identified on the slope and adjacent sea floor of the southwestern Florida Platform: (1) reef talus, recognized by shape and location, found on the upper slope of the Yucatan Channel and also east of the Marquesas Keys; (2) hemipelagic sediments, with complex sigmoid-oblique bed forms, filling the intervening gap between the channel and Keys...
Authors
Charles W. Holmes
Cathodoluminescent bimineralic ooids from the Pleistocene of the Florida continental shelf Cathodoluminescent bimineralic ooids from the Pleistocene of the Florida continental shelf
A bored and encrusted late Pleistocene ooid grainstone was recovered from the seafloor at a depth of approximately 40 m on the outer continental shelf of eastern Florida. Ooid cortices are dominantly bimineralic, generally consisting of inner layers of radial magnesian calcite and outer layers of tangential aragonite. Ooid nuclei are dominantly rounded cryptocrystalline grains, although...
Authors
R. P. Major, Robert B. Halley, Karen J. Lukas
Causes of two slope-failure types in continental-shelf sediment, northeastern Gulf of Alaska Causes of two slope-failure types in continental-shelf sediment, northeastern Gulf of Alaska
Slumps and sediment-gravity flows have been identified in Holocene glaciomarine sediment on declivities less than 1.3 degrees on the Gulf of Alaska continental shelf. Geologic and geotechnical investigation suggest that the processes responsible for these slope failures are earthquake and storm-wave loading, coupled with cyclic degradation of the sediment-shear strength. We propose that...
Authors
William C. Schwab, Homa J. Lee
An economic and geographic appraisal of a spatial natural hazard risk: a study of landslide mitigation rules An economic and geographic appraisal of a spatial natural hazard risk: a study of landslide mitigation rules
Efficient mitigation of natural hazards requires a spatial representation of the risk, based upon the geographic distribution of physical parameters and man-related development activities. Through such a representation, the spatial probability of landslides based upon physical science concepts is estimated for Cincinnati, Ohio. Mitigation programs designed to reduce loss from landslide...
Authors
R. L. Bernknopf, D.S. Brookshire, R. H. Campbell, C.D. Shapiro
Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure
A 180-km-long seismic refraction transect from the eastern High Cascades, across Newberry Volcano, to the eastern High Lava Plains is used to investigate the subvolcanic crustal and upper mantle velocity structure there. Near-surface volcanic flows and sedimentary debris (1.6-4.7 km/s), ranging from 3 to 5 km in thickness, overlie subvolcanic Basin and Range structures. East and west of...
Authors
R. D. Catchings, Walter D. Mooney
QED QED
No abstract available.
Regional earthquake hazards assessments Regional earthquake hazards assessments
No abstract available.
Authors
Henry Spall