Quarry No. 2, Sieber Ranch (AMNH) (Cretaceous of the United States)

Also known as Hell Creek Cañon

Where: Garfield County, Montana (47.5° N, 107.1° W: paleocoordinates 54.5° N, 79.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; blue claystone

• "a peculiar joint clay of a bluish color"

Size class: macrofossils

Collected by B. Brown, R. S. Lull, & Brooks in 1902; reposited in the AMNH

Collection methods: quarrying, surface (in situ),

Primary reference: J. B. Hatcher, O. C. Marsh, and R. S. Lull. 1907. The Ceratopsia. Monographs of the United States Geological Survey 49:1-198 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 228491: authorized by Matthew Carrano, entered by Matthew Carrano on 09.12.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia - Ceratopsidae
Triceratops sp.
Triceratops sp. Marsh 1889 ceratopsid
"vertebra, ribs, the sacrum, the lower jaws, and a few limb bones"