Where: Navajo County, Arizona (34.9° N, 109.8° W: paleocoordinates 10.6° N, 48.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "A greenish-gray mudstone in the upper portion of the Blue Mesa Member of the Chinle Formation(sensu Woody 2006) (Unit 14 of the Blue Mesa Member [Petrified Forest Formation, Chinle Group] type section of Lucas 1993). This horizon is situated approximately 14 meters above the Newspaper Rock Bed and approximately 9 meters below the base of the overlying Sonsela Member. Palynomorphs recovered from this horizon are considered to be latest Carnian in age, but recent recalibration of the Triassic timescale based on magnetostratigraphy and a new radiometric date from European marine sections suggest that most of the Chinle Formation, including this horizon, may be Norian in age."

•"Adamanian" in age

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray, green mudstone

Size class: macrofossils

Collection methods: quarrying,

• PEFO, Petrified Forest National Park, Arizona

Primary reference: W. G. Parker and B. J. Barton. 2008. New information on the Upper Triassic archosauriform Vancleavea campi based on new material from the Chinle Formation of Arizona. Palaeontologia Electronica 11(3):14A [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92810: authorized by Richard Butler, entered by Richard Butler on 30.11.2009

Creative Commons license: CC BY (attribution)