Nail Quarry, Como Bluff (Jurassic to of the United States)

Also known as WY-39, WDIS Quarry 2b

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.5° N, 52.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Talking Rocks Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• "Talking Rocks Member" near middle of formation; located just above caliche boundary in Unit B.

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; fine-grained, gray, green, calcareous claystone

• "Carlin Facies", poorly drained floodplain
• "gray smectitic claystone with some limestone"; "fine greenish-gray blocky mudstone"

Size class: macrofossils

Collected by D. Kralis & R. T. Bakker in 1990-1991

Collection methods: quarrying, mechanical,

Primary reference: R. T. Bakker, J. Siegwarth, D. Kralis and J. Filla. 1992. Edmarka rex, a new, gigantic theropod dinosaur from the middle Morrison Formation, Late Jurassic of the Como Bluff outcrop region. Hunteria 2(9):1-24 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49627: authorized by Matthew Carrano, entered by Matthew Carrano on 21.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Reptilia
 Loricata -
Crocodylia indet.2 crocodilian
 Ornithischia - Stegosauridae
Stegosaurus sp.3 Marsh 1877 ornithischian
 Theropoda - Megalosauridae
"Edmarka rex n. gen. n. sp." = Torvosaurus tanneri
"Edmarka rex n. gen. n. sp." = Torvosaurus tanneri Galton and Jensen 1979 tetanuran theropod
TATE 1002, 1005-6
 Theropoda -
Allosaurus sp.3 Marsh 1877 allosauroid
45 shed teeth "counted as 3 individuals" but also "up to 11 individuals" listed in same table
 Saurischia - Camarasauridae
Camarasaurus sp.3 Cope 1877 camarasaurid
"up to 14 indivudals"
 Saurischia - Diplodocidae
"Apatosaurus excelsus" = Brontosaurus excelsus1, Diplodocus sp.3
"Apatosaurus excelsus" = Brontosaurus excelsus1 Marsh 1879 diplodocid
TATE 099-1 (incl. skull)
Diplodocus sp.3 Marsh 1878 diplodocine
juvenile; "up to 14 individuals"
 Eosuchia -
Opisthias sp.1 Gilmore 1909 lepidosaur