Robert Gaston Quarry (CEU 91-1) (Cretaceous of the United States)

Also known as State of Utah Loc. 42Gr184V

Where: Grand County, Utah (38.8° N, 109.6° W: paleocoordinates 38.3° N, 59.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Yellow Cat Member (Cedar Mountain Formation), Barremian (129.4 - 125.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: pond; green, blue, silty mudstone and limestone

• "ephemeral alkaline pond"
• "primarily a mauve mudstone with thin (5-30 cm thick) sandstone beds. At 17.3 m above the base, there is an interval of interbedded limestone and shale that preserves mudcracks, dinosaur tracks. and barite crystal clusters...mudstones tend to be mauve toward the base and pale green toward the top...[they] do not appear to be smectitic...the basal calcrete is not always present." Also calcareous nodules representing paleosols. At this site specifically, "the bones are preserved in an interval of alternating limestone and silty shale...6.5 m below the top of the Yellow Cat Member."

Size class: macrofossils

Preservation: trace

Collected by R. Gaston in 1989

Collection methods: quarrying, mechanical,

Primary reference: J. I. Kirkland, D. Burge, and R. Gaston. 1993. A large dromaeosaur (Theropoda) from the Lower Cretaceous of eastern Utah. Hunteria 2(10):1-16 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27017: authorized by Matthew Carrano, entered by Matthew Carrano on 12.11.2002, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodontidae indet.2 Agassiz 1843 elasmobranch
Actinopteri
 Amiiformes - Amiidae
cf. Amia sp.3 Linnaeus 1766 bowfin
 Semionotiformes - Semionotidae
cf. Semionotus ? sp.3 Agassiz 1843
Osteichthyes
 Dipnoi -
Dipnoi indet.2 Müller 1884 lungfish
 Dipnoi - Ceratodontidae
Ceratodus sp.3 Agassiz 1838 lungfish
Reptilia
 Testudines - Pleurosternidae
cf. Glyptops sp.3 Marsh 1890 turtle
 Avetheropoda -
Maniraptora indet.2 Gauthier 1986 coelurosaur
 Avetheropoda - Dromaeosauridae
Utahraptor ostrommaysi n. gen. n. sp.
Utahraptor ostrommaysi n. gen. n. sp. Kirkland et al. 1993 coelurosaur
 Ornithischia - Nodosauridae
Gastonia burgei n. gen. n. sp.1
Gastonia burgei n. gen. n. sp.1 Kirkland 1998 ornithischian
 Neornithischia -
Iguanodon ottingeri2 Galton and Jensen 1979 bird foot dinosaur
 Neornithischia - Hypsilophodontidae
Hypsilophodontidae indet. Dollo 1882 hypsilophodontid
 Loricata -
Crocodylia indet.2 crocodilian
 Rhynchocephalia -
cf. Toxolophosaurus sp.3 Olson 1960 rhynchocephalian