Abstract
Abstract Three major turbidite sequences of carbonate sediments are interbedded with a background of brown clay and monospecific diatom ooze in an 11 m long piston-core sequence recovered from the 8053 m deep flat floor of the Palau Trench. The carbonate turbidites are composed of graded sand and silt laminae derived from coral-reef lagoons, and of homogeneous marly chalk thicker than 7 m. These turbidites do not show evidence of strong dissolution, except for erosion resuspension on bed surfaces and leaching of carbonate-bound Sr from some sand laminae. This suggests that these carbonate turbidites were transported very quickly or as massive beds into a trench basin far below the calcium-carbonate compensation depth.
Published Version
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