The lowest beds of Speeton Clay in overlying contact with any inferior stratum have never been found in Filey Bay, but a little to the south of a point where it is first exposed Lias “scars” exist with Ammonites communis and A. Walcotti in situ, showing great upheaval or disturbance, or else great unconformability here.

1. The lowest known beds of Speeton Clay, so called, consist of blue clay, with seams of septarian nodules. In one of these seams, in beds of a black claystone, specimens of Ammonites biplex three to four inches in diameter are not unfrequent. This is the only fossil found in this bed.