Petrified Forest Member

Geology

Formation: Chinle

Lithologies: not reported (120), "siliciclastic" (2), claystone (5), mudstone (13), siltstone (9), sandstone (5), conglomerate (7), wackestone (3), "limestone" (2), "carbonate" (1), chert (1)

Paleoenvironments: terrestrial indet. (137), fluvial indet. (1), coarse channel fill (3), fine channel fill (6), "channel" (1), "floodplain" (3), crevasse splay (3), pond (1)

Age range: base of the Norian to the top of the Oligocene or 228.00000 to 23.03000 Ma