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Scientific literature and information products produced by Woods Hole Coastal and Marine Science Center staff

Filter Total Items: 1737

Evidence for a postglacial low relative sea-level stand in the drowned delta of the Merrimack River, Western Gulf of Maine Evidence for a postglacial low relative sea-level stand in the drowned delta of the Merrimack River, Western Gulf of Maine

A submerged delta of the Merrimack River, located offshore between Cape Ann, Massachusetts, and the New Hampshire border, indicates a postglacial low relative see-level stand of about -47 m. The low stand is inferred to date to 10,500 yr B.P., but a lack of age control makes this assignment uncertain. A curve based on a late Wisconsinan, high relative sea-level stand of +32m at 13,000 yr...
Authors
R. N. Oldale, L. E. Wommack, A.B. Whitney

Earthquakes in the Orozco transform zone: seismicity, source mechanisms, and tectonics Earthquakes in the Orozco transform zone: seismicity, source mechanisms, and tectonics

As part of the Rivera Ocean Seismic Experiment, a network of ocean bottom seismometers and hydrophones was deployed in order to determine the seismic characteristics of the Orozco transform fault in the central eastern Pacific. We present hypocentral locations and source mechanisms for 70 earthquakes recorded by this network. All epicenters are within the transform region of the Orozco...
Authors
Anne M. Trehu, Sean C. Solomon

Bedform distribution and inferred sand transport on Georges Bank, United States Atlantic continental shelf. Bedform distribution and inferred sand transport on Georges Bank, United States Atlantic continental shelf.

Four bedform provinces have been identified using sidescan-sonar and echo-sounding techniques: large sand waves superimposed on sand ridges, small sand waves, megaripples, and featureless seafloor. Sand-wave asymmetry and surface-sediment texture have been used to infer bedload transport paths and although the asymmetry of megaripples could not be determined, the occurrence of...
Authors
D.C. Twichell

Quaternary geology of the Rhode Island inner shelf Quaternary geology of the Rhode Island inner shelf

Five sedimentary units and three erosional unconformities identified in high-resolution seismic-reflection profiles reveal the stratigraphic framework and Quaternary history of the inner continental shelf south of Narragansett Bay, Rhode Island. Late Tertiary to early Pleistocene rivers eroded the pre-Mesozoic bedrock and the Upper Cretaceous to lower Tertiary coastal plain and...
Authors
S. W. Needell, C. J. O’Hara, H.J. Knebel

Furrowed outcrops of Eocene chalk on the lower continental slop offshore New Jersey Furrowed outcrops of Eocene chalk on the lower continental slop offshore New Jersey

A sea bottom of middle Eocene calcareous claystone cut by downslope-trending furrows was observed during an Alvin dive to the mouth of Berkeley Canyon on the continental slope off New Jersey. The furrows are 10 to 50 m apart, 4 to 13 m deep, linear, and nearly parallel in water depths of 2,000 m. They have steep walls and flat floors 3 to 5 m wide, of fine-grained sediment. Mid-range...
Authors
James M. Robb, John R. Kirby, John C. Hampson, Patricia R. Gibson, Barbara Hecker

Biological control of the removal of abiogenic particles from the surface ocean Biological control of the removal of abiogenic particles from the surface ocean

Concurrent measurements of particle concentrations in the near-surface water and of particle fluxes in the deep water of the Sargasso Sea show a close coupling between the two for biogenic components. The concentrations of suspended matter appear to follow an annual cycle similar to that of primary production and deepwater particle flux. Although the concentration of particulate aluminum...
Authors
W.G. Deuser, P.G. Brewer, T.D. Jickells, R.F. Commeau

Geology report for proposed oil and gas lease sale No. 90; continental margin off the southeastern United States Geology report for proposed oil and gas lease sale No. 90; continental margin off the southeastern United States

This report summarizes our general knowledge of the geology and petroleum potential, as well as potential problems and hazards associated with development of petroleum resources, within the area proposed for nominations for lease sale number 90. This area includes the U.S. eastern continental margin from Raleigh Bay, just south of Cape Hatteras, to southern Florida, including the upper...
Authors
William P. Dillon

Characteristics of resuspended sediment from Georges Bank collected with a sediment trap Characteristics of resuspended sediment from Georges Bank collected with a sediment trap

A sediment trap was deployed 3 m from the bottom at a water depth of 62 m on the southern flank of Georges Bank (41°02·2′N, 67°33·5′W) from 30 September 1978 to 10 March 1979 to qualitatively determine the size of sediments resuspended from the bottom by winter storms and to determine if seasonal changes in the phytoplankton could be observed in the trapped sediment. Bulk X-ray analyses...
Authors
C.M. Parmenter, Michael H. Bothner, B. Butman

Talc in the suspended matter of the northwestern Atlantic Talc in the suspended matter of the northwestern Atlantic

Knowledge of the distribution, concentration, and composition of suspended particulate matter in seawater is important to the understanding of sedimentation processes on the Continental Shelf. Because the surfaces of both organic and inorganic particles have high affinities for pollutants, such as certain trace metals, chlorinated hydrocarbons, and petroleum (Bothner et al., 1981a)...
Authors
Lawrence J. Poppe, John C. Hathaway, Carol M. Parmenter

Regional significance of pre-Wisconsinan till from Nantucket Island, Massachusetts Regional significance of pre-Wisconsinan till from Nantucket Island, Massachusetts

A major pre-Wisconsinan glacial event is the only possible source of the lower till on Nantucket Island, Massachusetts. The till occurs near the late Wisconsinan drift border and below fossiliferous marine beds of oxygen-isotope stage 5 (Sangamonian) age. It is considered to be Illinoian in age, but the evidence is tenuous. The till is correlated with the lower till of New England, and...
Authors
R. N. Oldale, D.M. Eskenasy
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