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Availability of single channel seismic refraction profiles collected over U.S. Atlantic continental slope and rise north of Cape Hatteras - USGS cruises FAY 20 and FAY 21 - August/September 1976 Availability of single channel seismic refraction profiles collected over U.S. Atlantic continental slope and rise north of Cape Hatteras - USGS cruises FAY 20 and FAY 21 - August/September 1976

A series of single channel seismic reflection profiles were collected by the U.S. Geological Survey aboard the R.V. FAY from August 10, 1976 through September 7, 1976 during cruises FAY 20 and FAY 21. The chief scientist was, Dr. Kim D. Klitgord, U.S. Geological Survey, Woods Hole, MA 02543. The profiles are located on the slope and rise between Cape Hatteras and the New England...
Authors
Kim D. Klitgord

An instrument system for long-term sediment transport studies on the continental shelf An instrument system for long-term sediment transport studies on the continental shelf

A bottom-mounted instrument system has been designed and built to monitor processes of bottom sediment movement on the continental shelf. The system measures bottom current speed and direction, pressure, temperature, and light transmission and photographs the bottom. The system can be deployed for periods of 2–6 months to monitor intermitent processes of sediment movement such as storms...
Authors
Bradford Butman, David W. Folger

Structure and development of the Southeast Georgia Embayment and northern Blake Plateau: Preliminary analysis Structure and development of the Southeast Georgia Embayment and northern Blake Plateau: Preliminary analysis

Multichannel seismic reflection profiles from the Southeast Georgia Embayment and northern Blake Plateau show reflectors that have been correlated tentatively with horizons of known age. The top of the Cretaceous extends smoothly seaward beneath the continental shelf and Blake Plateau, unaffected at the present shelf edge. A reflector inferred to correspond approximately to the top of...
Authors
William P. Dillon, Charles K. Paull, Richard T. Buffler, Jean-Pierre Fail

Multichannel seismic depth sections and interval velocities over outer continental shelf and upper continental slope between Cape Hatteras and Cape Cod: Rifted margins Multichannel seismic depth sections and interval velocities over outer continental shelf and upper continental slope between Cape Hatteras and Cape Cod: Rifted margins

Six computer-generated seismic depth sections over the outer continental shelf and upper slope reveal that subhorizontal Lower Cretaceous reflectors continue 20 to 30 km seaward of the present shelf edge. Extensive erosion on the continental slope has occurred primarily during the Tertiary, causing major unconformities and retreat of the shelf edge to its present position. The precise...
Authors
John A. Grow, Robert E. Mattick, John S. Schlee

Factors controlling heavy-mineral variations on the South Texas outer continental shelf, Gulf of Mexico Factors controlling heavy-mineral variations on the South Texas outer continental shelf, Gulf of Mexico

Heavy-mineral distribution on the outer continental shelf off the southern coast of Texas shows regional variability induced by provenance and local variability reflecting genetic differences in sea-floor sediments. Q-mode factor analysis showed that three suites of heavy minerals are present. The southern ancestral Rio Grande delta sediments contain a distinct opaque-pyroxene-garnet...
Authors
R. M. Flores, G. L. Shideler

IPOD-USGS multichannel seismic reflection profile from Cape Hatteras to the Mid-Atlantic Ridge IPOD-USGS multichannel seismic reflection profile from Cape Hatteras to the Mid-Atlantic Ridge

A 3,400-km-long multichannel seismic-reflection profile from Cape Hatteras to the Mid-Atlantic Ridge was acquired commercially under contract to the National Science Foundation and the U.S. Geological Survey. These data show evidence for massive erosion of the continental slope, diapirs at the base of the continental slope, and mantle reflections beneath the Hatteras Abyssal Plain.
Authors
John A. Grow, Rudi G. Markl

Interactions of nutrients, plant growth and herbivory in a mangrove ecosystem Interactions of nutrients, plant growth and herbivory in a mangrove ecosystem

The effect of nutrient enrichment of red mangroves (Rhizophora mangle) was studied by comparing two mangrove—covered islands in the Indian River at Ft. Pierce, Florida, USA, one (high nutrient) with and one (low nutrient) without a breeding colony of pelicans and egrets. Repeated measurements taken on > 100 tagged branches in each area revealed higher growth rates at the high nutrient...
Authors
Christopher P. Onuf, John M. Teal, Ivan Valiela

Evidence of post-Pleistocene faults on New Jersey Atlantic outer continental shelf Evidence of post-Pleistocene faults on New Jersey Atlantic outer continental shelf

Recently obtained high-resolution seismic profiles (400-4,000-Hz band) show evidence of faults in shallow sedimentary strata near the edge of the Atlantic continental shelf off New Jersey. Apparent normal faults having a throw of about 1.5 m displace sediments to within 7 m of the sea floor. The faults appear to be overlain by undeformed horizontal beds of relatively recent age. Several...
Authors
R. E. Sheridan, H.J. Knebel

The scientific referee The scientific referee

In the May 1973 issue of EOS, I criticized tendencies in earth science periodicals to discourage referee anonymity. I stressed that exposing referees to unnecessary personal and subjective influences tended to degrade standards of quality and promoted cliques, fragmentation, superspecialization, and proliferation of scientific literature. Generally speaking, division of opinion on this...
Authors
Frank T. Manheim
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