ABSTRACT

Traditionally this Group of formations, which crops out along the northeast, east and southeast coasts of Jamacia, has been divided into an upper and lower part. The upper, of Pleistocene age, includes the Manchioneal Formation with the Navy Island Member and the beds in the upper part of the Bowden section. The lower part, at least partly of Pliocene age, includes the Bowden Formation, the San San Clay, the Buff Bay Formation and overlying beds in the Buff Bay section, and the August Town Formation.

Correlation of 8 different sections by means of ostracods shows some discrepancies with Blow's correlation, based on planktonic foraminifers. Distribution of ostracodes in the August Town Formation suggests its age to be older than that of the Bowden Shell Bed. The position of the overlying brackish water deposits, the Harbour View beds, is discussed. A new species of Cyprideis, with reversal of overlap and hinge, is described.