Prehistoric Park (RTMP) (Cretaceous of Canada)

Also known as Day Digs, PP

Where: Alberta, Canada (51.5° N, 112.7° W: paleocoordinates 59.1° N, 84.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; lenticular, brown, carbonaceous mudstone

• "poorly drained flood-basin deposits associated with swampy setting, small meandering channels, and minor splays. Sedimentation was probably influenced largely by seasonal rainfall and storm activity."
• "Each bonebed is hosted by massive to very poorly laminated, red brown to brown, sandy siltstones or silty sandstones, and each bonebed is rich in coalified plant fragments, amber, and dispersed, normally graded fossil bone and bone fragments. Each deposit is sharp-based and broadly lenticular in all directions where exposures allow assessment, and each deposit exhibits local occurrences of iron-carbonate cement and (or) concretionary ironstone development at, or near, the base."

Size classes: macrofossils, mesofossils

Preservation: permineralized, original silica

Collected in 2002–2004; reposited in the TMP

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

Primary reference: D. C. Evans, D. A. Eberth, and M. J. Ryan. 2015. Hadrosaurid (Edmontosaurus) bonebeds from the Horseshoe Canyon Formation (Horsethief Member) at Drumheller, Alberta, Canada: geology, preliminary taphonomy, and significance. Canadian Journal of Earth Sciences 52:642-654 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 69621: authorized by Matthew Carrano, entered by Matthew Carrano on 28.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudines - Trionychidae
Trionychidae indet.
Trionychidae indet. Gray 1825 softshell turtle
 Testudines - Chelydridae
Chelydridae indet.
Chelydridae indet. Swainson 1839 turtle
 Dinosauria -
Dinosauria indet.
Dinosauria indet. Owen 1842 dinosaur
 Theropoda - Tyrannosauridae
Tyrannosauridae indet.
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
shed teeth
 Theropoda - Troodontidae
Troodontidae indet.
Troodontidae indet. Gilmore 1924 maniraptoran
teeth
 Theropoda - Dromaeosauridae
Dromaeosauridae indet.
Dromaeosauridae indet. Colbert and Russell 1969 maniraptoran
teeth, phalanx, metatarsal
 Ornithischia -
Ornithischia indet.
Ornithischia indet. Seeley 1888 ornithischian
rib and tendon fragments
 Ornithischia - Hadrosauridae
Hadrosauridae indet., Edmontosaurus regalis
Hadrosauridae indet. Cope 1869 hadrosaurid
teeth
Edmontosaurus regalis Lambe 1917 hadrosaurine
 Ornithischia - Ceratopsidae
Ceratopsidae indet.
Ceratopsidae indet. Marsh 1888 ceratopsid
tooth
 Crocodylia -
Crocodylia indet.
Crocodylia indet. Owen 1842 crocodilian
teeth