Publications
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Sound Waves Newsletter
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Filter Total Items: 1741
Geometry of sandy deposits at the distal edge of the Mississippi Fan, Gulf of Mexico Geometry of sandy deposits at the distal edge of the Mississippi Fan, Gulf of Mexico
Sidescan sonar provides a map of the seafloor that has greatly improved the understanding of depositional processes on modern deep-sea fans (e.g. Mutti and Normark 1991). Here, we present a sidescan-sonar mosaic from the eastern Gulf of Mexico that images the distal reaches of a channel on the Mississippi Fan and the deposits associated with it (Fig. 41.1). This area is one of several...
Authors
D.C. Twichell, W. C. Schwab, Neil H. Kenyon
EAST93: Geophysical traverse from the Transantarctic Mountains to the Wilkes Basin, East Antarctica EAST93: Geophysical traverse from the Transantarctic Mountains to the Wilkes Basin, East Antarctica
The East Antarctic Seismic Traverse (EAST93) was a geophysical traverse designed to image the bedrock under the East Antarctic ice cap. The traverse started 10 km west of the Taylor Dome drill site and 25 km west of the exposed bedrock of the Transantarctic Mountains at Lashly Mt. and ended 323 km west of the drill site over the Wilkes subglacial basin (Fig. 1). The traverse was located
Authors
Uri S. ten Brink, Stephen Bannister
Introduction: large-scale coastal behavior Introduction: large-scale coastal behavior
No abstract available.
Authors
Jeffrey H. List, Joost H. J. Terwindt
Historical shoreline changes at Rincon, Puerto Rico Historical shoreline changes at Rincon, Puerto Rico
No abstract available.
Authors
E. Robert Thieler, Milton Carlo
Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin
We model the three-dimensional (3-D) crustal deformation in a deep pull-apart basin as a result of relative plate motion along a transform system and compare the results to the tectonics of the Dead Sea Basin. The brittle upper crust is modeled by a boundary element technique as an elastic block, broken by two en echelon semi-infinite vertical faults. The deformation is caused by a...
Authors
Rafael Katzman, Uri S. ten Brink, Jian Lin
Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation
Similar successions of planktonic foraminifera, calcareous nannofossils, and bolboformids document coeval deposition of the Exmore impact breccia (Virginia Coastal Plain) and an impact ejecta layer at DSDP Site 612 (New Jersey Continental Slope). Both impactites accumulated in the late Eocene during the early part of biochrons P15 (planktonic foraminifera) and NP 19-20 (calcareous...
Authors
C. Wylie Poag, Marie-Pierre Aubry
Pulling the rug out from under California: Seismic images of the Mendocino Triple Junction region Pulling the rug out from under California: Seismic images of the Mendocino Triple Junction region
The active tectonic regime of northwestern California changes abruptly from transform motion to subduction at the Mendocino Triple Junction. Northward migration of the triple junction has been a major factor in the tectonic history of the continental margin of California since the Oligocene and continues at present. Understanding the effects of triple junction migration on the structure...
Authors
Anne M. Trehu
Silt fraction heavy-mineral distributions in a lateritic environment: The rivers and insular shelf of north-central Puerto Rico Silt fraction heavy-mineral distributions in a lateritic environment: The rivers and insular shelf of north-central Puerto Rico
This fraction, which is enriched in heavy minerals relative to the sand fraction, is mainly detrital but contains a strong authigenic component. The authigenic silt heavy-mineral fraction is largely a product of the lateritic weathering and dominated by iron oxides and alterites. Grains of bladed rutile and leached ilmenite are common. Spatial variability in silt-fraction mineralogy is
Authors
L.J. Poppe, J.A. Commeau, G. Luepke
Geophysical database of the east coast of the United States: southern Atlantic margin-Stratigraphy and velocity from multichannel seismic profiles Geophysical database of the east coast of the United States: southern Atlantic margin-Stratigraphy and velocity from multichannel seismic profiles
No abstract available.
Authors
D. R. Hutchinson, C. W. Poag, Peter Popenoe
The impacts of mobile fishing gear on low topography benthic habitats in the Gulf of Maine (Northwest Atlantic): A preliminary report The impacts of mobile fishing gear on low topography benthic habitats in the Gulf of Maine (Northwest Atlantic): A preliminary report
No abstract available.
Authors
Peter J. Auster, Richard J. Malatesta, Richard W. Langton, Les Watling, Andrew N. Shepard, Ivar G. Babb
Decadal and annual changes in biogenic opal and carbonate fluxes to the deep Sargasso Sea Decadal and annual changes in biogenic opal and carbonate fluxes to the deep Sargasso Sea
Analyses of samples from a 14-year series of sediment-trap deployments in the deep Sargasso Sea reveal a significant trend in the ratio of the sinking fluxes of biogenic calcium carbonate and silica. Although there are pronounced seasonal cycles for both flux components, the overall opal/CaCO3 ratio changed by 50% from 1978 to 1991 (largely due to a decrease of opal flux), while total...
Authors
W.G. Deuser, T.D. Jickells, Judith A. Commeau