Abstract
A thin (∼1.5 m) transgressive systems tract within the Lower Paleocene Clayton Formation of western Alabama, composed of, in ascending order, a sandy pebbly marlstone (transgressive lag), calcareous muds, and a chalk (condensed section), contains an unusual abundance of allochthonous logs with Teredolites, a clavate boring produced within xylic substrates. Borings are characterised by diameters ranging from 1 to 15 mm, high length/width ratios, contorted axes oriented primarily parallel to the grain of substrates, calcite linings, and rare terminal bioglyphs. Although no body fossil evidence for the affinity of the boring organisms is preserved, these morphological characteristics, which are most allied with the ichnotaxon T. longissimus, reflect the boring activities of wood-digesting bivalves of the family Teredinidae
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