Where: Grand County, Utah (38.9° N, 110.1° W: paleocoordinates 37.3° N, 59.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• "The site is near the top of the lower Yellow Cat and is in part incorporated into the caprock"

•Date from "just above the capping sandstone above the Suarez site and below the Martharaptor site"

•

•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: terrestrial; lithology not reported

Size class: macrofossils

• "Falcarius bonebed....This site also preserves elements of a huge polacanthine ankylosaur nearly twice as big as Gastonia and uniquely, skeletal elements of a medium-sized theropod"

Primary reference: J. I. Kirkland and S. K. Madsen. 2007. The Lower Cretaceous Cedar Mountain Formation, Eastern Utah: the view up an always interesting learning curve. Utah Geological Association Publication 35 1-108 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 97956: authorized by Matthew Carrano, entered by Matthew Oreska on 09.09.2010, edited by Roger Benson

Creative Commons license: CC BY (attribution)