Abstract

A section of Ampthill Clay (upper Jurassic) exposed by the deepening of a stream near Knapwell, northwest of Cambridge, southeast England, yielded a new assemblage of ammonites, among which are species of Decipia and Perisphinctes. The assemblage correlates with that of the Trigonia clavellata beds of Dorset.

You do not currently have access to this article.