Word Formation
The Word Formation is a geologic formation in Texas. It preserves fossils dating back to the Permian period. It is probably named for the Old Word Ranch in the Glass Mountains of Brewster County. Defining formation. The Wordian age of the Permian Period is named for the Word Formation. Subdivisions. The formation is subdivided into three members, from young to old: Fossil content. The limestone formation contains marine gastropods, brachiopods and ammonites.