4.8 km WSW of Fruita, FPA (Jurassic to of the United States)

Also known as Opal Hill

Where: Colorado (39.1° N, 108.8° W: paleocoordinates 35.2° N, 55.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Salt Wash Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

Environment/lithology: alluvial fan; green, argillaceous, sandy siltstone

• At the FPA, the Morrison Formation is represented by an alluvial deposit consisting mainly of pale green, sandy siltstones and clays that are accompanied by pale red silts and buff sands. Channel deposits are characteristic of the Salt Wash Member.

Size class: macrofossils

Collected by G. Callison, J. M. Clark in 1976; reposited in the LACM

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

• The fossil was collected by James M. Clark, at the time a student at California State University, Long Beach, while conducting a surface survey of the area.

•The material was prepared with the use of an S.S. White Industrial Airabrasive Unit filled with powdered dolomite

Primary reference: Anonymous. 1977. The Fruita Paleontological Report 1-82 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137733: authorized by Roger Benson, entered by Roger Benson on 18.12.2012, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Rhynchocephalia -
Eilenodon robustus n. gen. n. sp.
Eilenodon robustus n. gen. n. sp. Rasmussen and Callison 1981 rhynchocephalian