Sediment cores from the Cariaco Trench, VEnezuela
The Cariaco Trench, located within the limits of the continental shelf off the Caribbean coast of Venezuela, is about 160 km long, 40 km wide, and lies 16-32 km offshore. Sill depth is about 150 m; maximum depth in the trench is about 1,400 m. Within the trench, waters deeper than 375 m are anoxic. During cruises in 1957 and 1958, R/V Atlantis collected over 20 sediment cores, mostly piston type of 3-10 m length, from the trench and its vicinity. The Holocene sediments from the euxinic zone of the trench are mostly grayish-olive and fine-grained; either laminated silt-clays or homogeneous silty clays, both types generally containing a paucity of benthic fauna. A lower zone of sediments, at least on the S. slopes, consists of yellowish-brown silty clays containing a fair representation of benthic fauna. These appear to have been deposited under normal marine conditions before the basin waters became anoxic (late Pleistocene).
- Research Organization:
- Woods Hole Oceanographic Institution, MA (USA)
- OSTI ID:
- 6737566
- Report Number(s):
- AD-618,089
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
CONTINENTAL MARGIN
CONTINENTAL SHELF
DEVELOPING COUNTRIES
DRILL CORES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGY
LATIN AMERICA
MINERAL RESOURCES
OIL WELLS
PETROLEUM
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
RESOURCES
SOUTH AMERICA
TOPOGRAPHY
VENEZUELA
WELL LOGGING
WELLS