ammonites
Brinkerhof Spring tracksite (Triassic of the United States)

Also known as Circle Cliffs 1, GS-ENM

Where: Garfield County, Utah (38.0° N, 111.1° W: paleocoordinates 17.3° N, 50.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Owl Rock Member (Chinle Formation), Rhaetian (205.6 - 201.6 Ma)

• upper part of member, approx. 3 m below Wingate Sandstone; late Revueltian

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; gray, green, silty claystone and concretionary, intraclastic, conglomeratic, calcareous sandstone

• "a thin-bedded, green-gray silt- and claystone just above a conglomeratic sandstone bed with clasts composed of calcium carbonate nodules."

Size class: macrofossils

Preservation: mold/impression, trace

Collected by Foster, Hamblin, & Lockley in 1999-2002

Collection methods: surface (in situ), mechanical,

Primary reference: J. R. Foster, A. H. Hamblin, and M. G. Lockley. 2000. The oldest evidence of a sauropod dinosaur in the western United States and other important vertebrate trackways from Grand Staircase-Escalante National Monument, Utah. Ichnos 7(3):169-181 [M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 57063: authorized by Matt Carrano, entered by Kaitlin Maguire on 01.12.2005, edited by Matt Carrano