RTMP L2000, Horsethief Canyon (Cretaceous of Canada)

Where: Alberta, Canada (51.5° N, 112.9° W: paleocoordinates 59.2° N, 84.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Horseshoe Canyon Formation (Edmonton Group), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; sideritic, silty, carbonaceous shale and ironstone

• meandering channel deposits interpreted as having been deposited in an overbank setting during a flood event; scattered fossils are interpreted to represent a modern deflational lag formed by winnowing away of fine-grained sediments
• "3.5 m thick, olive-coloured, silty shale that contains a prominent ironstone layer, abundant small siderite nodules and rare sideritized rhizoliths"

Size classes: macrofossils, mesofossils

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

Primary reference: M. J. Ryan, P. J. Currie, J. D. Gardner, M. K. Vickaryous, and J. M. Lavigne. 2000. Baby hadrosaurid material associated with an unusually high abundance of Troodon teeth from the Horseshoe Canyon Formation, Upper Cretaceous, Alberta, Cananda. Gaia 15:123-133 [M. Carrano/K. Maguire/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60563: authorized by Matthew Carrano, entered by Kaitlin Maguire on 17.05.2006, edited by John Alroy and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Theropoda -
Paronychodon sp. Cope 1876 maniraptoran
 Theropoda - Dromaeosauridae
Richardoestesia sp. Currie et al. 1990 maniraptoran
Dromaeosaurinae indet.3 Matthew and Brown 1922 maniraptoran
 Theropoda - Troodontidae
Albertavenator curriei2 Evans et al. 2017 maniraptoran
 Theropoda - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal
 Theriamorpha - Pediomyidae
Pediomyidae indet.1 Simpson 1927 metatherian