Where: Navajo County, Arizona (36.6° N, 110.6° W: paleocoordinates 23.7° N, 48.4° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Navajo Sandstone Formation (Glen Canyon Group), Pliensbachian to Pliensbachian (190.8 - 174.1 Ma)

• unknown stratigraphic level within formation

•

•Navajo Sandstone forms uppermost part of Glen Canyon Group, and is Early Jurassic, but probably not older than Pliensbachian (Irmis 2005. A review of the vertebrate fauna of the Lower Jurassic Navajo Sandstone in Arizona. Mesa Southwest Museum Bulletin 11:55–71)

• bed-level stratigraphic resolution

Environment/lithology: eolian; fine, red sandstone

Size class: macrofossils

Collected by M. Wetherill in 1938; reposited in the UCMP

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

• Collected by M. Wetherill in 1938

Primary reference: P. M. Galton. 1971. The prosauropod dinosaur Ammosaurus, the crocodile Protosuchus, and their bearing on the age of the Navajo Sandstone of northeastern Arizona. Journal of Paleontology 45(5):781-795 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 47191: authorized by Matthew Carrano, entered by Matthew Carrano on 17.02.2005, edited by Richard Butler

Creative Commons license: CC BY (attribution)