Also known as Petrified Forest, Crocodile Hill Quarry, Blue Mesa

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

• coordinate stated in text

• 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 ofthe 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."

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; intraclastic, gray, argillaceous, cherty/siliceous siltstone

Size classes: macrofossils, mesofossils

Collected by C. L. Camp, P. A. Murry in the 1923, 1980s; reposited in the UCMP

Collection methods: quarrying,

Primary reference: D. D. Gillette, S. R. Ash, and R. A. Long. 1986. Paleontology of the Petrified Forest National Park, Arizona. In J. D. Nations, C. M. Conway, & G. A. Swann (eds.), Geology of Central and Northern Arizona. Field Trip Guidebook for Geological Society of America Rocky Mountain Section Meeting 58-69 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 84264: authorized by Matthew Carrano, entered by Matthew Carrano on 02.10.2008, edited by Richard Butler

Creative Commons license: CC BY (attribution)