Sheba Mountain, Sieber Ranch (AMNH) (Cretaceous of the United States)

Also known as Tyrannosaurus rex type, Fort Peck, Hell Creek

Where: Dawson County, Montana (48.3° N, 105.8° W: paleocoordinates 54.9° N, 77.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lance Formation, Maastrichtian (72.1 - 66.0 Ma)

• 220 feet above Ft. Pierre in the "true Laramie"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, concretionary, blue sandstone

• Brown: "flinty blue sandstone nearly as hard as granite"

Size class: macrofossils

Preservation: concretion

Collected by B. Brown in 1902, 1905; reposited in the AMNH

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

Primary reference: H. F. Osborn. 1905. Tyrannosaurus and other Cretaceous carnivorous dinosaurs. Bulletin of the American Museum of Natural History 21(14):259-265 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49005: authorized by Matthew Carrano, entered by Matthew Carrano on 05.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Avetheropoda - Tyrannosauridae
Tyrannosaurus rex n. gen. n. sp.
Tyrannosaurus rex n. gen. n. sp. Osborn 1905 tyrant lizard king
CM 9380 = AMNH 973