Ruby Site, Haystack Butte (Cretaceous of the United States)

Where: Butte County, South Dakota (45.1° N, 103.5° W: paleocoordinates 51.4° N, 76.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; intraclastic, argillaceous, sandy conglomerate

• "a clay ball conglomerate and sand unit"

Size class: macrofossils

Collected by B. Marty in 1981–1983; reposited in the SDSM

Collection methods: quarrying,

Primary reference: P. S. Hill. 1983. Haystack Butte surrenders terrible lizard. American West 20(2):22-29 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 74175: authorized by Matthew Carrano, entered by Matthew Carrano on 26.07.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Tyrannosauridae
Gorgosaurus sp.1, "Tyrannosaurus imperator" = Tyrannosaurus rex2
Gorgosaurus sp.1 Lambe 1914 tyrannosaurid
"Tyrannosaurus imperator" = Tyrannosaurus rex2 Osborn 1905 tyrant lizard king
SDSM 12047
 Ornithischia - Hadrosauridae
Edmontosaurus sp.3
Edmontosaurus sp.3 Lambe 1917 hadrosaurine
 Ornithischia -
Thescelosaurus sp.1, ? Pachycephalosauria indet.1
Thescelosaurus sp.1 Gilmore 1913 ornithopod
"a thesselosaur"
? Pachycephalosauria indet.1 ornithischian
"a possible pachycephalosaur"
 Ornithischia - Ceratopsidae
Triceratops sp.1
Triceratops sp.1 Marsh 1889 ceratopsid
1Bjork 1985; 2Paul et al. 2022; 3Stein 2019