Abstract

Allochthonous logs and/or Teredolites, clavate borings produced within xylic (wood) substrates, occur in extraordinary abundance as sedimentary components in transgressive marine shelf deposits of the lower Paleocene Clayton Formation in western Alabama. It is pro-posed herein that the abundance and preservational state of these components were controlled by (1) an influx pulse of xylic substrates into marine and marginal-marine environments, (2) hydraulic concentration of substrates during ravinement, and (3) condensation associated with sediment starvation, all three of which are induced by sea-level rise. The proposed relations among fossil wood, ichnofossils produced therein, and sea-level dynamics may be of use in the discrimination of sequence stratigraphic packages and their bounding surfaces; these relations also have implications for paleobotanical prospecting and the biological evolution and stratigraphic distribution of marine organisms that inhabit xylic substrates.

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