Where: Parker County, Texas (32.7° N, 97.8° W: paleocoordinates 30.9° N, 51.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Twin Mountains Formation (Trinity Group), Late/Upper Aptian (122.5 - 112.0 Ma)

• 130 m below nearest outcrop of overlying Glen Rose Limestone

• bed-level stratigraphic resolution

Environment/lithology: "channel"; concretionary, cherty/siliceous sandstone

Size classes: macrofossils, mesofossils

Collected in 1990

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: J. D. Harris. 1998. A reanalysis of Acrocanthosaurus atokensis, its phylogenetic status, and paleobiogeographic implications, based on a new specimen from Texas. New Mexico Museum of Natural History and Science Bulletin 13:1-75 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51709: authorized by Matt Carrano, entered by Matt Carrano on 13.06.2005