Publications
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Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California
A catastrophic rainstorm in central California on January 3-5,1982, dropped as much as half the mean annual precipitation within a period of about 32 hours, triggering landslides and floods throughout 10 counties in the vicinity of the San Francisco Bay. More than 18,000 of the slides induced by the storm transformed into debris flows that swept down hillslopes or drainages with little...
Authors
Gerald F. Wieczorek
Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska
Slope failures and subsequent mass movements have been identified in Holocene glaciomarine sediment on declivities less than 1.3° on the Alsek prodelta, Gulf of Alaska. Isolated collapse features cover less than 10 percent of a nearshore sand deposit, in water depths less than 40 m. In contrast, sediment gravity flow deposits (disintegrative failures) cover more than 95 percent of a...
Authors
William C. Schwab, Homa J. Lee, Bruce F. Molnia
Strontium-isotope stratigraphy of Enewetak Atoll Strontium-isotope stratigraphy of Enewetak Atoll
87Sr/86Sr ratios determined for samples from a 350 m core of Neogene lagoonal, shallow-water limestones from Enewetak Atoll display a remarkably informative trend. Like the recently published data for Deep Sea Drilling Project (DSDP) carbonates, 87Sr/86Sr at Enewetak increases monotonically but not smoothly from the early Miocene to the Pleistocene. The data show intervals of little or...
Authors
K.R. Ludwig, Robert B. Halley, Kathleen R. Simmons, Zell E. Peterman
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