MRNA Tracksite (Cretaceous of Canada)

Also known as Milk River

Where: Alberta, Canada (49.1° N, 110.7° W: paleocoordinates 56.3° N, 76.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Oldman Formation (Belly River Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• in the upper member of the formation, ca. 25 m above the top of the Comrey Sandstone

• bed-level stratigraphic resolution

Environment/lithology: fluvial; green mudstone and paleosol/pedogenic, gray, sandy siltstone

• "deposited in an ephemeral, low-sinuosity fluvial setting."
• "The Oldman Formation of southernmost Alberta is over 160 m thick and consists of interbedded sandstones, siltstones, and mudstones"

•"The hadrosaur tracks occur at the surface of a thick, drab mudstone and are hosted within a light gray siltstone."

•"Strata exposed in the study area consist of interbedded mudstones, siltstones, and cross-stratified to laminated sandstones."

•"The tracks are exposed atop a drab green, structureless mudstone unit; however, their host sediment is a thin, light gray, sandy siltstone layer that immediately overlies this mudstone."

Size class: macrofossils

Preservation: cast, mold/impression, trace, concretion

Collected in 2007

Collection methods: surface (in situ),

Primary reference: F. Therrien, D. K. Zelenitsky, K. Tanaka and W. J. Sloboda. 2014. First hadrosaur trackway from the Upper Cretaceous (late Campanian) Oldman Formation, southeastern Alberta. In D. A. Eberth & D. C. Evans (ed.), Hadrosaurs 532-539 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 168226: authorized by Matthew Carrano, entered by Matthew Carrano on 17.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
One trackway with 8 tracks