Giant sediment drifts on the continental rise west of the Antarctic Peninsula |
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| Authors: | Michele Rebesco Robert D Larter Angelo Camerlenghi Peter F Barker |
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| Institution: | (1) Istituto di Geologia, Università di Parma, Viale delle Scienze, 43100 Parma, Italy;(2) Osservatorio Geofisico Sperimentale, P.O. Box 2011, 34016 Trieste, Italy;(3) British Antarctic Survey, High Cross, Madingley Road, CB3 0ET Cambridge, UK |
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| Abstract: | Multichannel seismic reflection profiles from the continental rise west of the Antarctic Peninsula between 63° and 69°S show the growth of eight very large mound-shaped sedimentary bodies. MCS profiles and long-range side-scan sonar (GLORIA) images show the sea floor between mounds is traversed by channels originating in a dendritic pattern near the base of the continental slope. The mounds are interpreted as sediment drifts, constructed mainly from the fine-grained components of turbidity currents originating on the continental slope, entrained in a nepheloid layer within the ambient southwesterly bottom currents and redeposited downcurrent. |
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