Moon Valley northeast of Study Butte (Cretaceous of the United States)

Also known as TMM 45818, Big Bend NP

Where: Brewster County, Texas (29.4° N, 103.5° W: paleocoordinates 36.0° N, 82.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Black Peaks Formation (Tornillo Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• "from the lower part of the Black Peaks Formation"

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; nodular, red mudstone

• "interpreted as a fluvial flood-plain deposit"
• "The skeleton had weathered out of a red mudstone bed with carbonate nodules"

Size class: macrofossils

• "a fragmentary skeleton including basioccipital, left jugal and quadratojugal, parts of the right ramus of the mandible, two loose teeth, ten dorsal vertebral centra, parts of two neural arches, three complete dorsal ribs and five rib heads, many fragments of gastralia, central part of left clavicle, left scapula, parts of several epipodials, and many fragments of uncertain identity."

Collected by K. Barnes; reposited in the TMM

Collection methods: surface (float),

Primary reference: T. M. Lehman and K. Barnes. 2010. Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications. Journal of Paleontology 84(2):341-345 [M. Carrano/H. Street]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 110177: authorized by Matthew Carrano, entered by Hallie Street on 03.06.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Kinosternoidea
Hoplochelys sp. Hay 1908 mud turtle
 Crocodylia - Alligatoridae
Alligatoridae indet. Gray 1844 crocodilian
teeth of alligatorid crocodylians
 Choristodera -
Champsosaurus sp. Cope 1876 choristodere
TMM 45818-0 through -32