UCM 83268, Steele Butte (Cretaceous of the United States)

Where: Garfield County, Utah (38.1° N, 110.9° W: paleocoordinates 45.9° N, 81.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lower Member (Masuk Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; sandstone and carbonaceous mudstone

• "The base of the lower member consists of 13-66 ft (4-20 m) of coal and carbonaceous shale, commonly divided by thin ripple-laminated sandstones. The coal zone is overlain by 131 ft (40 m) of trough cross-stratified sandstones and associated flood-basin carbonaceous mudstones"

Size class: mesofossils

Collected by J. G. Eaton

Primary reference: J. G. Eaton. 1990. Stratigraphic revision of Campanian (Upper Cretaceous) rocks in the Henry Basin, Utah. The Mountain Geologist 27(1):27-38 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 167530: authorized by Matthew Carrano, entered by Matthew Carrano on 20.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Ptychotrigon sp.
Reptilia
 Ornithischia - Hadrosauridae
Hadrosauridae indet.
Hadrosauridae indet. Cope 1869 hadrosaurid
tooth partial
 Saurischia -
Saurischia indet.
Saurischia indet. Seeley 1888 saurischian
tooth partial
 Testudines - Trionychidae
Trionychidae indet.
Trionychidae indet. softshell turtle
carapace fragment
 Testudines - Adocidae
Adocus sp.
Adocus sp. Cope 1868 turtle
carapace fragment
 Testudines - Nanhsiungchelyidae
Basilemys sp.
Basilemys sp. Hay 1902 turtle
carapace fragment
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
1 carapace fragment. Fossil from second individual unstated
 Testudinata - Helochelydridae
Naomichelys sp.
Naomichelys sp. Hay 1908 turtle
carapace fragment
Actinopteri
 Amiiformes - Amiidae
Amiidae indet.
Amiidae indet. Huxley 1861 bowfin
vertebra
Gnathostomata
  -
Chondrichthyes indet.
Chondrichthyes indet. Huxley 1880 cartilaginous fish
teeth; teeth fragments
Chondrichthyes
 Chimaeriformes - Chimaeridae
Chimaeridae indet.
Chimaeridae indet. chimaera
4 teeth from one individual, ~20 teeth from the other
 Batoidea -
Batoidea indet.
Batoidea indet. ray
1 tooth from each individual
 Hybodontiformes - Hybodontidae
Hybodus sp.
Hybodus sp. Agassiz 1834 elasmobranch
scales; teeth