Detailed Abyssal Sedimentation Studies in the Panama Basin: Cruise Report of Expedition Cocotow Legs 2b and 3.

摘要

A deeply towed instrument package surveyed three sites in the southern part of the Panama Basin where fast bottom currents control abyssal sedimentation. On the central Carnegie Ridge a field of sand dunes at a depth of 2.7 km was remapped to determine their motion since a 1972 survey. Erosion and transportation of sediment by the fast (> 30 cm/sec) thermohaline inflow of the Panama Basin was examined in the trench off Ecuador. Dissection of a carbonate sediment plateau into steep-sided depressions was studied on the eastern Carnegie Ridge. This preliminary report describes the deep tow observations, current meter records, cores and dredges that were collected.