Hotel Mesa East, OMNH V857 (Cretaceous to of the United States)

Also known as Hotel Mesa Quarry

Where: Grand County, Utah (38.8° N, 109.3° W: paleocoordinates 38.8° N, 63.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• "Stratigraphically, OMNHV857 lies in a sequence of Lower Cretaceous rocks interposed between the Morrison Formation (Kimmeridgian) below and the Dakota Formation (Cenomanian) above. Westward, these rocks are recognized as the Cedar Mountain Formation; eastward, the Burro Canyon Formation. The arbitrary dividing line between these entities is generally placed at the Colorado River (Stokes 1952; Tschudy et al. 1984) which technically places OMNHV857 within the Burro Canyon Formation. However, we will refer to the locality as belonging to the more widely recognized Cedar Mountain Formation, as it is in this formation that comparable specimens are known, and the stratigraphy and sedimentology do not change across the arbitrary border." (Taylor et al. 2011:76)

•"Stratigraphically, OMNH locality V857 lies within the Ruby Ranch Member, a few meters below the local contact with the Dakota Formation (see Kirkland et al. 1999: fig. 8). As a working hypothesis, we regard the fossils from the Hotel Mesa site as being Aptian–Albian" (Taylor et al. 2011: 77)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; pebbly, muddy sandstone

• "the fossil horizon, which is mainly sandstone with some pebbles and intermittent, irregular mudstone stringers, is about 40-50 cm thick"

Size classes: macrofossils, mesofossils

• "Juvenile brachiosaurid ilium"

Collected by Cifelli, Kirkland, Hawes, Nydam in 1994–1995

Collection methods: bulk, salvage, quarrying, mechanical, sieve,

• OMNH: Oklahoma Museum of Natural History. Site originally worked by private collectors; identity and disposition of those specimens not known.

Primary reference: B. A. Swanson, V. L. Santucci, S. K. Madsen, A. S. Elder, and J. P. Kenworthy. 2005. Arches National Park paleontological survey. Geological Resources Division Technical Report NPS/NRGRD/GRDTR-05/01 1-36 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 97951: authorized by Matthew Carrano, entered by Matthew Oreska on 09.09.2010, edited by Richard Butler, Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Polyacrodontidae
? Polyacrodus sp.1 Jaekel 1889 elasmobranch
 Hybodontiformes - Hybodontidae
Hybodontidae indet.1 Agassiz 1843 elasmobranch
Gnathostomata
  -
Actinopteri
 Lepisosteiformes - Lepisosteidae
? Lepisosteidae indet.1 Cuvier 1825 gar
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus sp.1 Agassiz 1838 lungfish
Reptilia
 Saurischia -
Brontomerus mcintoshi n. gen. n. sp.1 Taylor et al. 2011 sauropod
Theropoda indet.1 Marsh 1881 theropod
 Avetheropoda - Dromaeosauridae
Deinonychus sp. Ostrom 1969 coelurosaur
 Neornithischia -
Ornithopoda indet.1 Marsh 1881 bird foot dinosaur
 Loricata -
Crocodyliformes indet.1 Hay 1930 crocodilian
Mesoeucrocodylia indet.2 Whetstone and Whybrow 1983 crocodilian
 Loricata - Goniopholididae
Goniopholididae indet.1 Cope 1875 crocodilian
 Loricata -
Bernissartia sp.1 Dollo 1883 crocodilian