Publications
Filter Total Items: 7511
Geologic and geotechnical conditions adjacent to the Turnagain Heights landslide, Anchorage, Alaska Geologic and geotechnical conditions adjacent to the Turnagain Heights landslide, Anchorage, Alaska
No abstract available.
Authors
Randall G. Updike, H. W. Olsen, H. R. Schmoll, Y.K. Kharaka, K.H. Stokoe
U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine
Deep seismic reflection and magnetic data suggest that the Gulf of Maine is underlain by four crustal blocks of differing reflection and magnetic character. Two of these blocks, the Gulf of Maine fault zone and adjacent central plutonic zone, can be correlated with Avalonian rocks in southern New England and New Brunswick. The boundary between them, the Fundy fault, projects onshore near...
Authors
Deborah R. Hutchinson, Kim D. Klitgord, Myung W. Lee, Anne M. Trehu
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
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
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
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
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
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
The Manti, Utah, landslide The Manti, Utah, landslide
PART A: The Manti landslide is in Manti Canyon on the west side of the Wasatch Plateau in central Utah. In early June 1974, coincident with the melting of a snowpack, a rock slump/debris flow occurred on the south rim of Manti Canyon. Part of the slumped material mixed with meltwater and mobilized into a series of debris flows that traveled down the slope a distance of as much as 1.2 km...
Authors
R. W. Fleming, R. B. Johnson, R. L. Schuster, G. P. Williams
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