In their 1822 book on "Outlines of the Geology of England and Wales" Conybeare referred to the same features in an introduction about the relationship between geology and religion, describing how a deluge causing "the last great geological change to which the surface of our planet appears to have been exposed" left behind the debris (which he named in Latin "Diluvium") as evidence for "that great and universal catastrophe to which it seems most properly assignable".