Big Dry Quarry (Cretaceous of the United States)

Also known as Big Dry Creek, Big Dry West

Where: Garfield County, Montana (48.0° N, 106.5° W: paleocoordinates 54.8° N, 78.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• 30 m above Fox Hills Sandstone

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone

Size class: macrofossils

Collected by B. Brown in 1908; reposited in the AMNH, CM

Collection methods: quarrying, mechanical,

• collected August 10, 1908 by Barnum Brown

Primary reference: H. F. Osborn. 1909. Extinct mammals, birds, reptiles and fishes. Fortieth Annual Report of the American Museum of Natural History for the Year 1908 30-32 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48848: authorized by Matthew Carrano, entered by Matthew Carrano on 31.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Avetheropoda - Tyrannosauridae
Tyrannosaurus rex Osborn 1905 tyrant lizard king
AMNH 5029 (field no. 6) (=CM 9379)
 Neornithischia - Pachycephalosauridae
"Stygimoloch spinifer" = Pachycephalosaurus wyomingensis
"Stygimoloch spinifer" = Pachycephalosaurus wyomingensis Gilmore 1931 ornithischian
AMNH 21541 (field no. 5)