Hobson Ranch, SMU Loc. 261 (Cretaceous of the United States)

Where: Parker County, Texas (32.7° N, 97.8° W: paleocoordinates 30.7° N, 52.4° 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; upper Twin Mountains Fm.

• bed-level stratigraphic resolution

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

• "a cross-bedded and concretionary sandstone facies"

Size classes: macrofossils, mesofossils

Collected by SMU in 1950, 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 Matthew Carrano, entered by Matthew Carrano on 13.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
? Osteichthyes indet. bony fish
tooth
Reptilia
 Loricata -
Crocodylia indet. crocodilian
teeth
 Theropoda - Carcharodontosauridae
Acrocanthosaurus atokensis Stovall and Langston 1950 allosauroid
SMU 74646