Where: Navajo County, Arizona (35.0° N, 109.9° W: paleocoordinates 10.7° N, 48.3° W)

• coordinate based on nearby landmark

When: Sonsela Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• 6 to 8 metre below Sonsela Sandstone according to Long & Murry (1995)

•This collection was originally listed as in the lower Petrified Forest Member by Long & Murry (1995), but as the Sonsela Member by Parker & Barton (2008) and Nesbitt et al. (2009)

Environment/lithology: terrestrial; siltstone

Size class: macrofossils

Collected by UCMP, NPS, USNM, AMNH in 1921-1985; reposited in the UCMP

Primary reference: R. A. Long and P. A. Murry. 1995. Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254 [M. Carrano/M. Carrano/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92821: authorized by Richard Butler, entered by Richard Butler on 01.12.2009

Creative Commons license: CC BY (attribution)