Mill Canyon Dinosaur Tracksite (MCDT) (Cretaceous to of the United States)

Where: Grand County, Utah (38.7° N, 109.7° W: paleocoordinates 38.8° N, 63.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ruby Ranch Member (Cedar Mountain Formation), Aptian to Aptian (125.0 - 100.5 Ma)

• Overall, based on zircon ages and chemostratigraphic studies, the Ruby Ranch Member ranges in age from ap-proximately middle Aptian to middle Albian (about 118 to 105 Ma) for the western Paradox Basin and northern San Rafael Swell. Other radiometric ages indicate the presence of upper Albian strata as well (Chure and others, 2010; Ludvigson and others, 2010a, 2015; Sprinkel and others, 2012)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, gray dolomite

• "the trackbed is complex lithologically and best described as a light-gray, microcrystalline impure cherty dolostone, having a hardness of 5.5. The hardness of the track-bearing layer has contributed to its preservation."

Size class: macrofossils

Preservation: mold/impression, trace

Collection methods: surface (in situ),

Primary reference: N. A. Matthews, T. Noble, and B. Breithaupt. 2016. Close-range photogrammetry for 3-D ichnology: the basics od photogrammetric ichnology. In P. L. Falkingham, D. Marty, & A. Richter (eds.), Dinosaur Tracks: The Next Steps 28-55 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 201626: authorized by Matthew Carrano, entered by Matthew Carrano on 17.05.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Pustularichnus rebeccahuntfosterae2
Reptilia
 Saurischia - Titanosauridae
? Titanosauridae indet.3
? Titanosauridae indet.3 Lydekker 1885 titanosaurid
 Saurischia -
Brontopodus sp.3
Brontopodus sp.3 Farlow et al. 1989 sauropod
 Theropoda -
Irenesauripus sp.3
Irenesauripus sp.3 Sternberg 1932 theropod
 Theropoda - Dromaeopodidae
Dromaeosauripus sp.4
Dromaeosauripus sp.4 Kim et al. 2008 maniraptoran
orig. ID Dromaeopodus; UCM 199.67, 199.68, 199.82
 Theropoda -
Carmelopodus sp.1
Carmelopodus sp.1 Lockley et al. 1998 theropod
 Ornithischia - Tetrapodosauridae
Tetrapodosaurus sp.1
Tetrapodosaurus sp.1 Sternberg 1932 ornithopod
 Ornithischia - Iguanodontipodidae
cf. Caririchnium sp.3
cf. Caririchnium sp.3 Leonardi 1984 ornithopod
 Crocodylia -
Hatcherichnus sp.1
Hatcherichnus sp.1 Foster and Lockley 1997 crocodilian
1Breithaupt et al. 2023; 2Kirkland and Lively 2023; 3Kirkland et al. 2016; 4Lockley et al. 2016