Chinle Formation - Ages of Chinle Members

Ages of Chinle Members

The Chinle Formation is aged from early Late Triassic. Age correlation is based on Lucas' Land Vertebrate Faunachrons. The faunachrons are based on first and last appearances of phytosaurs. Simplified stratigraphy based on Litwin.

Sub-stage Faunachron Chinle Member(s)
Late Norian-Rhaetian Apachean Rock Point/Church Rock
Early to Middle Norian Revueltian Owl Rock

Upper Petrified Forest

upper Late Carnian Adamanian Sonsela Sandstone

Lower Petrified Forest

Moss Back

Monitor Butte

lower Late Carnian Otischalkian Shinarump

Temple Mountain

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