Where: Emery County, Utah (38.9° N, 109.5° W: paleocoordinates 37.2° N, 59.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Yellow Cat Member (Cedar Mountain Formation), Valanginian (139.8 - 132.9 Ma)

• near top of member

•

•The age of the base of the YCM is unknown and estimates range from Berrisian to early Aptian. Britt et al. 2007 suggested a maximum depositional age for the YCM of ~124Ma, but Sames et al. 2010 suggested on the basis of ostracod biostratigraphy the YCM may be as old as Late Berrisian. Hendrix et al. 2015 and Joeckel et al. 2019 supported this with U-Pb dates from detrital zircons, the latter study suggested that the upper YCM is Valanginian. At any rate, the age of the overlying Poison strip member was dated at its base to 119.4Ma, so the YCM is older than this.

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; green, sandy, calcareous mudstone

Size classes: macrofossils, mesofossils

Reposited in the DMNH

Collection methods: quarrying, mechanical,

Primary reference: D. Gilpin, K. Carpenter, and T. DiCroce. 2002. New ornithopod with hadrosaur-like features from the Lower Cretaceous of Utah. Journal of Vertebrate Paleontology 22(3 (suppl.)):58A-59A [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73890: authorized by Matthew Carrano, entered by Matthew Carrano on 11.07.2007

Creative Commons license: CC BY (attribution)