The pelecypods from locality 67ABe428B consist of genera that could be of Jurassic or of Cretaceous age. The species of Entolium present greatly resembles E. inequivalve Hayami (1959, Japanese Journal Geol. and Geography, V. 30, p. 154, pl. 13, figs. 3-8) from the Upper Jurassic of Japan. That species is characterized by its left valve being nearly smooth and by its right valve bearing very broad, flat concentric ribs that are separated by narrow grooves. Similar species have been described from Europe in Cretaceous beds as high as Cenomanian (e.g. Entolium orbiculare Sowerby). The Astarte present (one specimen only) resembles A. ignekensis Imlay from the Ignek and Tuktu Formations, but its ribbing does not fade ventrally as in that species. The specimen referred questionably to Panope is of little age value. The fossil evidence is not sufficient to assign the collection at locality 67ABe428B definitely either to the Jurassic or Cretaceous, but there is no question that it is younger than Triassic.