|Carbonate mound model. Boulvain et.al. 2004. |
Adam has not only named but also classified animals and given the collective name Frasnian to Late Devonian fauna. The term is practical to paleontologists who understand the concept frasnian and get an idea of what kind of life forms are present.
The term Frasnian comes from an important region where evidence of this phase in the history of life on Earth has been found, Frasnes-lez-Couvin in Belgium. From the sediments, rock cut sections and mudhills many Devonian carbonates have been notices. To help us to learn more of the site there is a scientific tour guide written by Frédéric Boulvain.
|Pink limestone, Petit-Mond Rochefontaine quarry, Belgium|
Important discoveris of Frasnian fauna has been made also in Western Canada and in Ausralia.
North American paleontologists have divided the period that has Frasnian fauna into five sub-periods called by the places evidence has been found Senecan, Sonyea, Sonyean and West Falls (wikipedia).