Blacktail Creek, MOR TM-066 (Cretaceous of the United States)

Where: Glacier County, Montana (48.6° N, 113.8° W: paleocoordinates 56.5° N, 79.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Flag Butte Member (Two Medicine Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• Found in the uppermost 100 m of the 650 m thick formation.

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; gray, green mudstone and fine-grained siltstone

• "greenish-grey mudstones"; "Bones were preserved in a fine-grained siltstone, interpreted as a small rivulet that had transected a nesting ground. The siltstone layer was sandwiched between layers of mud rock."

Size class: macrofossils

Preservation: soft parts

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

• Eggs with embryos, eggshells and disarticulated skeletal remains.

Primary reference: J. R. Horner and P. J. Currie. 1994. Embryonic and neonatal morphology and ontogeny of a new species of Hypacrosaurus (Ornithischia, Lambeosauridae) from Montana and Alberta. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge 312-336 [A. Behrensmeyer/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 53048: authorized by Matthew Carrano, entered by Kaitlin Maguire on 01.09.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia - Ankylosauridae
Ankylosauridae indet.
Ankylosauridae indet. Brown 1908 ankylosaurid
 Ornithischia - Hadrosauridae
Hypacrosaurus stebingeri
Hypacrosaurus stebingeri Horner and Currie 1994 lambeosaurine
MOR 548