Wednesday, 29 May 2019


Vertipecten fucanus / Miocene / Clallam Formation
Some water worn samples of the fossil bivalve Vertipecten fucanus from lower Miocene deposits in the Clallam Formation.

These were collected on the foreshore near Clallam Bay, Olympic Peninsula, northwestern Washington.

Until Addicott's study from 1976, the area was considered middle Miocene. The new lower Miocene designation can be credited in large part to the restricted stratigraphic range of Vertipecten fucanus (Dall) and the restricted and overlapping ranges of several other mollusks.