Also known as Arches

Where: Grand County, Utah (38.8° N, 109.5° W: paleocoordinates 37.1° N, 59.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• upper part of member

•

•Detrital zircons from the quarry and adjacent, lateral equivalents provide a maximum depositional age of 125 Ma, indicating the horizon is no older than early Albian (Eberth et al., 2006), but more recent work indicates that the upper part of the Yellow Cat Member is Valanginian (Joeckel et al. 2020)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; lenticular sandstone

Size class: macrofossils

Collected by A. Milner in 2004

Collection methods: quarrying, mechanical,

Primary reference: A. T. McDonald, J. I. Kirkland, D. D. DeBlieux, S. K. Madsen, J. Cavin, A. R. C. Milner, and L. Panzarin. 2010. New basal iguanodonts from the Cedar Mountain Formation of Utah and the evolution of thumb-spiked dinosaurs. PLoS One 5(11):e14075:1-35 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105613: authorized by Matthew Carrano, entered by Matthew Carrano on 23.02.2011, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)