Petrified wood with Clam borings-Cupressinoxylon sp.-
Edwards Formation, Kerr County, Texas.
Cretaceous period 100 mya.
8″ across
Toredo wood with shipworm boring holes. …
Teredo petrified wood is unique because of the “worming” of the original wood by the prehistoric teredo – a worm-shaped mollusk related to modern clams, mussels, and oysters. Millions years ago, the teredo was burrowing through trees growing near the edges of warm swamps and oceans. These trees would end up in the water, where they were attacked by these hole boring clams. When the driftwood became waterlogged and sank to the bottom, it was covered with silt, filling the boreholes with sediment.
