Baltuck, Miriam; Taylor, Elliott; McDougall, Kristin (1985): Benthic foraminiferal composition at the inner wall of the Middle America Trench, Costa Rica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.803884, Supplement to: Baltuck, M et al. (1985): Mass movement along the inner wall of the Middle America Trench, Costa Rica. In: von Heune, R; Aubouin, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 84, 551-570, https://doi.org/10.2973/dsdp.proc.84.114.1985
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The sediments of Deep Sea Drilling Project Site 565 and University of Texas Marine Science Institute Cores IG-24-7-38 to -42 taken on the landward slope of the Middle America Trench exhibit characteristics of material subject to reworking during downslope mass flow. These characteristics include a generally homogeneous texture, lack of sedimentary structures, pervasive presence of a penetrative scaly fabric, and presence of transported benthic foraminifers. Although these features occur throughout the sediments examined, trends in bulk density, porosity, and water content, and abrupt shifts in these index physical properties and in sediment magnetic properties at Site 565 indicate that downslope sediment creep is presently most active in the upper 45 to 50 m of sediment. It cannot be determined whether progressive dewatering of sediment has brought the material at this depth to a plastic limit at which sediment can no longer flow (thus resulting in its accretion to the underlying sediments) or whether this depth represents a surface along which slumping has occurred. We suspect both are true in part, that is, that mass movements and downslope reworking accumulate sediments in a mobile layer of material that is self-limiting in thickness.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 9.534867 * Median Longitude: -85.728882 * South-bound Latitude: 9.156670 * West-bound Longitude: -86.090700 * North-bound Latitude: 9.728200 * East-bound Longitude: -84.968330
Date/Time Start: 1982-01-13T00:00:00 * Date/Time End: 1982-01-13T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Baltuck, M; Taylor, E; McDougall, K (1985): (Table 3) Benthic foraminiferal composition at DSDP Hole 84-565. https://doi.org/10.1594/PANGAEA.803883
- Baltuck, M; Taylor, E; McDougall, K (1985): (Table 2) Benthic foraminiferal composition at University of Texas Marine Science Institute (UTMSI) piston cores at Costa Rican slope sediments. https://doi.org/10.1594/PANGAEA.803983