Sediment transport in Washington and Norfolk submarine canyons: Fid-Bau Portal

Fachinformationsdienst BAUdigital

A platform for research: civil engineering, architecture and urbanism

Sediment transport in Washington and Norfolk submarine canyons

Forde, Evan B. / Stanley, Daniel J. / Sawyer, William B. / Slagle, Karen J.

AbstractA sediment study suggests that Washington and Norfolk canyons off the Mid-Atlantic States are not inactive, but have served periodically since the Late Pleistocene as conduits of sediment originating on the adjacent shelf and upper slope. Large quantities of sand occur in the canyon heads as thin beds and laminae, and on the continental slope as mixtures of sand (to $>40%$ ), silt and clay that are extensively reworked by burrowing organisms. Sandy turbidites occur in the canyons on the rise. Basinward dispersal, from the outer shelf and uppermost slope, is recorded by heavy mineral suites and bioclastic components, primarily foraminifera of shallow marine origin, in the lower slope and upper continental rise canyon cores. The down-axis movement of material, presumably episodic, in the Holocene to recent results from offshelf spillover into canyon heads, failure on the steep walls bordering canyons on the slope, and resuspension by bottom currents.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Sediment transport in Washington and Norfolk submarine canyons

Forde, Evan B. / Stanley, Daniel J. / Sawyer, William B. / Slagle, Karen J.

AbstractA sediment study suggests that Washington and Norfolk canyons off the Mid-Atlantic States are not inactive, but have served periodically since the Late Pleistocene as conduits of sediment originating on the adjacent shelf and upper slope. Large quantities of sand occur in the canyon heads as thin beds and laminae, and on the continental slope as mixtures of sand (to $>40%$ ), silt and clay that are extensively reworked by burrowing organisms. Sandy turbidites occur in the canyons on the rise. Basinward dispersal, from the outer shelf and uppermost slope, is recorded by heavy mineral suites and bioclastic components, primarily foraminifera of shallow marine origin, in the lower slope and upper continental rise canyon cores. The down-axis movement of material, presumably episodic, in the Holocene to recent results from offshelf spillover into canyon heads, failure on the steep walls bordering canyons on the slope, and resuspension by bottom currents.

Sediment transport in Washington and Norfolk submarine canyons

Forde, Evan B. / Stanley, Daniel J. / Sawyer, William B. / Slagle, Karen J.

AbstractA sediment study suggests that Washington and Norfolk canyons off the Mid-Atlantic States are not inactive, but have served periodically since the Late Pleistocene as conduits of sediment originating on the adjacent shelf and upper slope. Large quantities of sand occur in the canyon heads as thin beds and laminae, and on the continental slope as mixtures of sand (to $>40%$ ), silt and clay that are extensively reworked by burrowing organisms. Sandy turbidites occur in the canyons on the rise. Basinward dispersal, from the outer shelf and uppermost slope, is recorded by heavy mineral suites and bioclastic components, primarily foraminifera of shallow marine origin, in the lower slope and upper continental rise canyon cores. The down-axis movement of material, presumably episodic, in the Holocene to recent results from offshelf spillover into canyon heads, failure on the steep walls bordering canyons on the slope, and resuspension by bottom currents.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Document information

Title:

Sediment transport in Washington and Norfolk submarine canyons

Contributors:

Forde, Evan B. (author) / Stanley, Daniel J. (author) / Sawyer, William B. (author) / Slagle, Karen J. (author)

Published in:

Applied Ocean Research ; 3 ; 59-62

Publication date:

1981-01-01

Size:

4 pages

ISSN:

DOI:

https://doi.org/10.1016/0141-1187(81)90002-X

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Similar titles

INSTRUMENTATION FOR INVESTIGATING SUBMARINE CANYONS

Bird, L. E. / Paull, C. K. / Hobson, B. W. | British Library Online Contents | 2007

SAND CAPTURE IN SOUTHERN CALIFORNIA SUBMARINE CANYONS

Everts, C. H. / Eldon, C. D. | British Library Online Contents | 2005

Effect of Submarine Canyons on Tsunami Propagation: A Case Study of the Biobio Canyon, Chile

Aranguiz, R. / Shibayama, T. | British Library Online Contents | 2013

Airflow and pollutant transport in street canyons

Nazridoust, Kambiz | Online Contents | 2006

EFFECT OF SUBMARINE CANYONS ON TSUNAMI PROPAGATION: A CASE STUDY OF THE BIOBIO CANYON, CHILE

ARANGUIZ, RAFAEL | Online Contents | 2013