Pliocene to recent infilling and subsidence of intraslope basins offshore Louisiana
- Columbia Univ., Palisades, NY (United States)
Intraslope basins on the lower eastern Louisiana continental slope are modern analogs of large oil- and gas-charged basins infilled on the upper Louisiana slope and buried landward beneath the shelf. High-resolution, gridded multibeam bathymetry and single-channel seismic reflection profiles are used to (1) characterize the morphology and shallow stratigraphy of 46 intraslope basins within the outer slope region; and (2) look for surficial evidence among the basins of slope channelways that fed sediment flows to the Mississippi Fan during the Pliocene-Pleistocene. Computer algorithms, traditionally employed for automatically mapping river networks in gridded land topography, are used to extract morphologic measurements of the intraslope basins from the gridded bathymetry. The basins are found to average approximately 15 km in length, 10 km in width, and 200 m in depth and occur over a map area of about 50 km{sup 2}. These dimensions, however, can range over an order of magnitude.
- OSTI ID:
- 44962
- Journal Information:
- AAPG Bulletin, Vol. 78, Issue 10; Other Information: PBD: Oct 1994
- Country of Publication:
- United States
- Language:
- English
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