Quarry 13, Como Bluff (YPM) (Jurassic to of the United States)

Also known as WY-46

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.5° N, 52.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lake Como Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• low in formation

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; poorly lithified, fine-grained, medium, gray sandstone and brown, green claystone

• channel-top overbank deposit in a moderately drained floodplain
• "a stratum of sandy clay...intercalated between bands of marl or clay, green below and brownish above, all three lying between layers of sandstone." Actually a "fine-grained sandstone" (Foster 2003)

Size classes: macrofossils, mesofossils

Collected by Reed in 1879-1887; reposited in the UNSM, YPM

Collection methods: quarrying, mechanical,

• density = 3.8

Primary reference: O. C. Marsh. 1879. Notice of new Jurassic reptiles. American Journal of Science and Arts 18:501-505 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 39253: authorized by Matthew Carrano, entered by Matthew Carrano on 25.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Pisces
  -
"Pisces indet." = Osteichthyes2
"Pisces indet." = Osteichthyes2 Huxley 1880 bony fish
Reptilia
 Testudines - Pleurosternidae
Glyptops plicatulus2 Cope 1877 turtle
 Saurischia - Diplodocidae
Diplodocus sp.6 Marsh 1878 diplodocine
 Saurischia -
"Morosaurus sp." = Camarasaurus2, "? Morosaurus sp." = Camarasaurus2, "Morosaurus lentus n. sp." = Camarasaurus lentus5
"Morosaurus sp." = Camarasaurus2 Cope 1877 sauropod
"? Morosaurus sp." = Camarasaurus2 Cope 1877 sauropod
"Morosaurus lentus n. sp." = Camarasaurus lentus5 Marsh 1889 sauropod
YPM 1910
 Saurischia - Brachiosauridae
? Brachiosaurus sp.1 Riggs 1903 brachiosaurid
 Avetheropoda - Allosauridae
Allosaurus sp.2 Marsh 1877 allosaurid
 Avetheropoda -
Coelurus fragilis n. gen. n. sp., Coelurus agilis n. sp.6
Coelurus fragilis n. gen. n. sp. Marsh 1879 coelurosaur
YPM 1991, 1992, 1993
Coelurus agilis n. sp.6 Marsh 1884 coelurosaur
YPM 2010
 Ornithischia - Stegosauridae
? Stegosaurus sp.2 Marsh 1877 ornithischian
Stegosaurus sp.2 Marsh 1877 ornithischian
includes at least 3 juveniles
Stegosaurus affinis n. sp.6 Marsh 1881 ornithischian
"Diracodon laticeps n. gen. n. sp." = Stegosaurus armatus3 Marsh 1877 ornithischian
YPM 1885
Stegosaurus ungulatus Marsh 1879 ornithischian
USNM 6646
Stegosaurus stenops4 Marsh 1887 ornithischian
YPM 1856 ("Stegosaurus Y")
 Ornithischia -
Stegosaurus sulcatus n. sp.4 Marsh 1879 ornithischian
 Neornithischia - Dryosauridae
Dryosaurus altus n. sp.2 Marsh 1878 bird foot dinosaur
 Neornithischia -
Camptosaurus sp.2, ? Camptosaurus sp.2, "Camptonotus dispar n. sp." = Camptosaurus dispar, "Camptosaurus browni n. sp." = Camptosaurus dispar2, "Camptosaurus nanus n. sp." = Camptosaurus dispar2, "Camptosaurus medius n. sp." = Camptosaurus dispar2, "? Camptosaurus depressus" = Osmakasaurus depressus2, Laosaurus sp.6
Camptosaurus sp.2 Marsh 1885 bird foot dinosaur
? Camptosaurus sp.2 Marsh 1885 bird foot dinosaur
"Camptonotus dispar n. sp." = Camptosaurus dispar Marsh 1879 bird foot dinosaur
YPM 1877
"Camptosaurus browni n. sp." = Camptosaurus dispar2 Marsh 1879 bird foot dinosaur
USNM 4282
"Camptosaurus nanus n. sp." = Camptosaurus dispar2 Marsh 1879 bird foot dinosaur
USNM 2210
"Camptosaurus medius n. sp." = Camptosaurus dispar2 Marsh 1879 bird foot dinosaur
YPM 1880
"? Camptosaurus depressus" = Osmakasaurus depressus2 Gilmore 1909 bird foot dinosaur
Laosaurus sp.6 Marsh 1878 bird foot dinosaur
 Loricata - Goniopholididae
Goniopholis sp.2 Owen 1842 crocodilian