Publications
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Morphology, distribution, and development of submarine canyons on the United States Atlantic continental slope between Hudson and Baltimore Canyons Morphology, distribution, and development of submarine canyons on the United States Atlantic continental slope between Hudson and Baltimore Canyons
The distribution and morphology of submarine canyons off the eastern United States between Hudson and Baltimore Canyons have been mapped by long-range sidescan sonar. In this area canyons are numerous, and their spacing correlates with overall slope gradient; they are absent where the gradient is less than 3°, are 2 to 10 km apart where the gradient is 3° to 5°, and are 1.5 to 4 km apart...
Authors
David C. Twichell, David G. Roberts
High-resolution seismic-reflection profiles from the R/V Columbus Iselin, cruise CI 7-78-2, over the continental shelf and slope in the Georges Bank area High-resolution seismic-reflection profiles from the R/V Columbus Iselin, cruise CI 7-78-2, over the continental shelf and slope in the Georges Bank area
In September 1978, the U. S. Geological Survey (USGS) collected 5,029 km of single-channel seismic-reflection data from the Georges Bank area of the Atlantic Continental Shelf and Slope during the R/V COLUMBUS ISELIN cruise CI 7-78-2. The purpose of the cruise was to determine the location and frequency of mass sediment movement and other geologic hazards along the Continental Slope...
Authors
Norman G. Bailey, John M. Aaron
Stratigraphy, structure, absolute age, and paleontology of the upper Pleistocene deposits at Sankaty Head, Nantucket Island, Massachusetts Stratigraphy, structure, absolute age, and paleontology of the upper Pleistocene deposits at Sankaty Head, Nantucket Island, Massachusetts
The Sankaty Head cliff exposes drift of at least two glaciations and interglacial marine deposits. Radiocarbon, amino-acid- racemization, and uranium-thorium analyses were used to determine the absolute ages of the beds. The results indicate that 1) the Sankaty Sand correlates with oxygen-isotope stage 5 (Sangamonian), 2) the underlying drift is older than stage 5 (Illinoian or older)...
Authors
Robert N. Oldale, Page C. Valentine, T. M. Cronin, E.C. Spiker, B. W. Blackwelder, D. F. Belknap, J.F. Wehmiller, Barney J. Szabo
A note on transients in the SRO and ASRO long-period data A note on transients in the SRO and ASRO long-period data
Data users have occasionally observed pulse-like transients in the long-period waveforms recorded at the Seismic Research Observatories (SRO) and at the Modified High-Gain Long-Period (ASRO) stations. In a recent paper, Dziewonski et al (1981) reported transients associated with earthquake signals record at some SRO stations, and the authors ascribed these transients to an unpredictable...
Authors
Jon Peterson
International Geomagnetic Reference Field International Geomagnetic Reference Field
In August 1981 the International Association of Geomagnetism and Aeronomy revised the International Geomagnetic Reference Field (IGRF). It is the second revision since the inception of the IGRF in 1968. The revision extends the earlier series of IGRF models from 1980 to 1985, introduces a new series of definitive models for 1965-1975, and defines a provisional reference field for 1975...
Authors
N.W. Peddie
International geomagnetic reference field 1980 International geomagnetic reference field 1980
[No abstract available]
Authors
N.W. Peddie
Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii
Piton de la Fournaise, on the island of La Réunion, and Kilauea volcano, on the island of Hawaii, are active, basaltic shield volcanoes growing on the flanks of much larger shield volcanoes in intraplate tectonic environments. Past studies have shown that the average rate of magma production and the chemistry of lavas are quite similar for both volcanoes. We propose a structural...
Authors
Wendell A. Duffield, Laurent Stieltjes, Jacques Varet
Landslides and related features, Kentucky and Tennessee, Corbin 1° x 2° sheet Landslides and related features, Kentucky and Tennessee, Corbin 1° x 2° sheet
No abstract available.
Authors
Alfred R. Taylor, Roger E. Thomas
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1982 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1982
No abstract available.
Authors
J.B. Townshend, J.E. Papp, E.A. Sauter, L.Y. Torrence