MOR TM-281 (Cretaceous of the United States)

Where: Teton County, Montana (47.7° N, 112.3° W: paleocoordinates 55.4° N, 78.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Two Medicine Formation, Early/Lower Campanian (83.5 - 70.6 Ma)

• site is about 40 m above tuff dated at 80 Ma; age estimate from this is ca. 79.43 Ma. Lower part of formation

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; yellow, calcareous sandstone

• "a tan-colored, moderately sorted, subangular to subrounded, calcareously cemented sublitharenite with a basal lag deposit containing macrovertebrate, microvertebrate, and plant remains"

Size class: macrofossils

Collected in 1999

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

• collected by "Junior Paleontologists" from Univ. of Chicago with Old Trail Museum

Primary reference: T. A. Gates, J. R. Horner, R. R. Hanna and C. R. Nelson. 2011. New unadorned hadrosaurine hadrosaurid (Dinosauria, Ornithopoda) from the Campanian of North America. Journal of Vertebrate Paleontology 31(4):798-811 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 120363: authorized by Matthew Carrano, entered by Matthew Carrano on 11.11.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Hadrosauridae
Acristavus gagslarsoni n. gen. n. sp.
Acristavus gagslarsoni n. gen. n. sp. Gates et al. 2011 hadrosaurine
MOR 1155
unclassified
  -
Plantae indet. Haeckel 1866