Little Cottonwood Creek (Cretaceous of the United States)

Where: Phillips County, Montana (48.6° N, 107.7° W: paleocoordinates 55.2° N, 73.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Judith River Formation (Montana Group), Middle Campanian (83.5 - 70.6 Ma)

• lower portions of formation

• bed-level stratigraphic resolution

Environment/lithology: fluvial; fine-grained, argillaceous, carbonaceous sandstone

• Meandering River
• "loosely consolidated, fine-grained sandstone containing some clay clasts and some laminates of carbonaceous plant material"

Size class: macrofossils

• Damage to the neural spines of the last sacral vertebra and first two caudal vertebrae. Remodeled bone shows that the individual survived the attack.

Collection methods: surface (in situ), mechanical,

Primary reference: N. L. Murphy, K. Carpenter, and D. Trexler. 2013. New evidence for predation by a large tyrannosaurid. In J. M. Parrish, R. E. Molnar, P. J. Currie, & E. B. Koppelhus (eds.), Tyrannosaurid Paleobiology 278-285 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 167804: authorized by Matthew Carrano, entered by Matthew Carrano on 03.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia - Hadrosauridae
Brachylophosaurus cf. canadensis
Brachylophosaurus cf. canadensis Sternberg 1953 hadrosaurine
Specimen consists of dorsals 15-18, sacrals 1-9, caudals 1-74 with associated chevrons and ossified tendons, the ilia, proximal ends of the left and right pubes, iliac peduncle of the left and right ischia, and proximal ends of the left and right femora. (JRF 1002)