Canda-galli Grit, the basement subdivision of the Devonian system of North America. The name (lit. 'cock's tail') is derived from the feathery forms of a common fossil, supposed to be a seaweed.
Canda-galli Grit
Chambers's Encyclopaedia, Volume 3: Catarrh to Dion, p. 27
Source scan(s): p. 0036