Rock cut by dredgers in and around Castle Harbour, Bermuda, has been studied for fossil content. The rock was obtained from depths up to 50 feet below sea level, and much of it was rich in marine fossils. The section is interpreted as a series of beds about 40 feet thick and as representing the record between the post-volcanic period and the formation of the eolianites in the glacial period. The possibility that the beds are the result of a rising sea level within the glacial period must also be considered.
The distribution of the species found is reported, and the sequence of the fauna and of the strata suggests that the beds represent a period of shallowing of the sea.