Internal tides and sediment movement on Horizon Guyot,Mid-Pacific Mountains |
| |
Authors: | David A Cacchione William C Schwab Marlene Noble George Tate |
| |
Institution: | (1) U.S. Geological Survey, 345 Middlefield Road, 94025 Menlo Park, California;(2) U S. Geological Survey, Quissett Campus, 02543 Woods Hole, Massachusetts, USA |
| |
Abstract: | Internal tidal currents are the likely cause of erosional features such as current ripples, sand waves, and truncated bedding horizons on the sediment cap of Horizon Guyot. Current meter data obtained over a 9 month period in 1983–1984 at about 213 m above the guyot show that the tidal currents are anomalously strong for mid-oceanic depths, probably the result of topographically induced generation of internal tidal waves. An analysis of the initiation of motion of the foraminiferal sand by the internal tidal currents indicates that these currents, particularly during the months of March–May, are likely to transport the surficial sediment and generate the observed bedforms. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|