Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic
The Darwin Mounds are small (up to 70 m in diameter), discrete cold-water coral banks found at c. 950 m water depth in the northern Rockall Trough, north-east Atlantic. Formerly described in terms of their genesis, the Darwin Mounds are re-evaluated here in terms of mound growth processes based on 1...
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ftsouthampton:oai:eprints.soton.ac.uk:50409 2023-07-30T04:05:41+02:00 Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic Wheeler, Andrew J. Kozachenko, Maxim Masson, Doug G. Huvenne, Veerle A.I. 2008-12 https://eprints.soton.ac.uk/50409/ http://www3.interscience.wiley.com/cgi-bin/fulltext/120121286/PDFSTART unknown Wheeler, Andrew J., Kozachenko, Maxim, Masson, Doug G. and Huvenne, Veerle A.I. (2008) Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic. Sedimentology, 55 (12), 1875-1887. (doi:10.1111/j.1365-3091.2008.00970.x <http://dx.doi.org/10.1111/j.1365-3091.2008.00970.x>). Article PeerReviewed 2008 ftsouthampton https://doi.org/10.1111/j.1365-3091.2008.00970.x 2023-07-09T20:54:46Z The Darwin Mounds are small (up to 70 m in diameter), discrete cold-water coral banks found at c. 950 m water depth in the northern Rockall Trough, north-east Atlantic. Formerly described in terms of their genesis, the Darwin Mounds are re-evaluated here in terms of mound growth processes based on 100 and 410 kHz side-scan sonar data. The side-scan sonar coverage is divided into a series of acoustic facies representing increasing current speed and sediment transport/erosion from south to north: pockmark facies, ‘mounds within depressions’ facies, Darwin Mound facies, stippled seabed facies and sand wave facies. Mound morphometric changes are quantified and show a south-to-north divergence from an inherited morphology, reflecting the outline of coral-colonized fluid escape structures, to developed, downstream elongated, elevated mound forms. It is postulated that increasing current speeds and bedload sand transport favour mound growth and development by a process of enhanced sand sedimentation within mounds due to current deceleration by frictional drag around coral colonies. Comparisons are made with similar growth processes attributed to comparably sized cold-water coral mounds in the Porcupine Seabight, offshore Ireland. Article in Journal/Newspaper North East Atlantic University of Southampton: e-Prints Soton Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) Sedimentology 55 6 1875 1887 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The Darwin Mounds are small (up to 70 m in diameter), discrete cold-water coral banks found at c. 950 m water depth in the northern Rockall Trough, north-east Atlantic. Formerly described in terms of their genesis, the Darwin Mounds are re-evaluated here in terms of mound growth processes based on 100 and 410 kHz side-scan sonar data. The side-scan sonar coverage is divided into a series of acoustic facies representing increasing current speed and sediment transport/erosion from south to north: pockmark facies, ‘mounds within depressions’ facies, Darwin Mound facies, stippled seabed facies and sand wave facies. Mound morphometric changes are quantified and show a south-to-north divergence from an inherited morphology, reflecting the outline of coral-colonized fluid escape structures, to developed, downstream elongated, elevated mound forms. It is postulated that increasing current speeds and bedload sand transport favour mound growth and development by a process of enhanced sand sedimentation within mounds due to current deceleration by frictional drag around coral colonies. Comparisons are made with similar growth processes attributed to comparably sized cold-water coral mounds in the Porcupine Seabight, offshore Ireland. |
format |
Article in Journal/Newspaper |
author |
Wheeler, Andrew J. Kozachenko, Maxim Masson, Doug G. Huvenne, Veerle A.I. |
spellingShingle |
Wheeler, Andrew J. Kozachenko, Maxim Masson, Doug G. Huvenne, Veerle A.I. Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
author_facet |
Wheeler, Andrew J. Kozachenko, Maxim Masson, Doug G. Huvenne, Veerle A.I. |
author_sort |
Wheeler, Andrew J. |
title |
Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
title_short |
Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
title_full |
Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
title_fullStr |
Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
title_full_unstemmed |
Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic |
title_sort |
influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the darwin mounds, north-east atlantic |
publishDate |
2008 |
url |
https://eprints.soton.ac.uk/50409/ http://www3.interscience.wiley.com/cgi-bin/fulltext/120121286/PDFSTART |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) ENVELOPE(-13.000,-13.000,50.500,50.500) |
geographic |
Rockall Trough Porcupine Seabight |
geographic_facet |
Rockall Trough Porcupine Seabight |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
Wheeler, Andrew J., Kozachenko, Maxim, Masson, Doug G. and Huvenne, Veerle A.I. (2008) Influence of benthic sediment transport on cold-water coral bank morphology and growth: the example of the Darwin Mounds, north-east Atlantic. Sedimentology, 55 (12), 1875-1887. (doi:10.1111/j.1365-3091.2008.00970.x <http://dx.doi.org/10.1111/j.1365-3091.2008.00970.x>). |
op_doi |
https://doi.org/10.1111/j.1365-3091.2008.00970.x |
container_title |
Sedimentology |
container_volume |
55 |
container_issue |
6 |
container_start_page |
1875 |
op_container_end_page |
1887 |
_version_ |
1772817775820013568 |