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

Also known as WY-46, Quarry 13 West, Quarry 13 Middle, Quarry 13 East, 13W, 13E

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.6° N, 52.3° 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, Unit A

• 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; "9-Mile Facies"; well-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. 1878. Principal characters of American Jurassic dinosaurs. Part I. American Journal of Science and Arts 16:411-416 [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

Show authors, comments, and common names
Reptilia
 Theropoda -
Allosaurus sp.3, "Coelurus fragilis n. gen. n. sp." = Coelurus fragilis4, "Coelurus agilis n. sp." = Coelurus fragilis6
Allosaurus sp.3 Marsh 1877 allosauroid
"Coelurus fragilis n. gen. n. sp." = Coelurus fragilis4 Marsh 1879 coelurosaur
YPM 1991, 1992, 1993, 1994, 1995
"Coelurus agilis n. sp." = Coelurus fragilis6 Marsh 1879 coelurosaur
YPM 2010
 Ornithischia - Dryosauridae
"Laosaurus altus n. sp." = Dryosaurus altus
"Laosaurus altus n. sp." = Dryosaurus altus Marsh 1878 ornithopod
YPM 1876
 Ornithischia -
Camptosaurus sp.3, ? Camptosaurus sp.3, "Camptonotus dispar n. sp." = Camptosaurus dispar4, "Camptosaurus nanus n. sp." = Camptosaurus dispar9, "Camptosaurus medius n. sp." = Camptosaurus dispar9, "Camptosaurus browni n. sp." = Camptosaurus dispar2, "? Camptosaurus depressus" = Osmakasaurus depressus3, Laosaurus sp.11
Camptosaurus sp.3 Marsh 1885 ornithopod
? Camptosaurus sp.3 Marsh 1885 ornithopod
"Camptonotus dispar n. sp." = Camptosaurus dispar4 Marsh 1879 ornithopod
YPM 1877
"Camptosaurus nanus n. sp." = Camptosaurus dispar9 Marsh 1879 ornithopod
USNM 2210
"Camptosaurus medius n. sp." = Camptosaurus dispar9 Marsh 1879 ornithopod
YPM 1880
"Camptosaurus browni n. sp." = Camptosaurus dispar2 Marsh 1879 ornithopod
USNM 4282
"? Camptosaurus depressus" = Osmakasaurus depressus3 Gilmore 1909 ornithopod
Laosaurus sp.11 Marsh 1878 ornithopod
 Ornithischia - Stegosauridae
? Stegosaurus sp.3, Stegosaurus sp.3, Stegosaurus sulcatus n. sp.7, Diracodon laticeps n. gen. n. sp.5, Stegosaurus stenops7, Stegosaurus affinis n. sp.10, Stegosaurus ungulatus4
? Stegosaurus sp.3 Marsh 1877 ornithischian
Stegosaurus sp.3 Marsh 1877 ornithischian
includes at least 3 juveniles
Stegosaurus sulcatus n. sp.7 Marsh 1887 ornithischian
USNM 4937
Diracodon laticeps n. gen. n. sp.5 Marsh 1881 ornithischian
YPM 1885
Stegosaurus stenops7 Marsh 1887 ornithischian
YPM 1856 ("Stegosaurus Y")
Stegosaurus affinis n. sp.10 Marsh 1881 ornithischian
YPM pubis
Stegosaurus ungulatus4 Marsh 1879 ornithischian
USNM 6646
 Saurischia - Camarasauridae
"Morosaurus sp." = Camarasaurus3, "? Morosaurus sp." = Camarasaurus3, "Morosaurus lentus n. sp." = Camarasaurus lentus8
"Morosaurus sp." = Camarasaurus3 Cope 1877 camarasaurid
"? Morosaurus sp." = Camarasaurus3 Cope 1877 camarasaurid
"Morosaurus lentus n. sp." = Camarasaurus lentus8 Marsh 1889 camarasaurid
YPM 1910
 Saurischia - Brachiosauridae
? Brachiosaurus sp.1
? Brachiosaurus sp.1 Riggs 1903 brachiosaurid
 Saurischia - Diplodocidae
Diplodocus sp.11
Diplodocus sp.11 Marsh 1878 diplodocine
 Loricata - Goniopholididae
Goniopholis sp.3
Goniopholis sp.3 Owen 1842 crocodilian
 Testudinata - Pleurosternidae
Glyptops plicatulus3
Glyptops plicatulus3 Cope 1877 turtle
Pisces
  -
"Pisces indet." = Osteichthyes3
"Pisces indet." = Osteichthyes3 Huxley 1880 bony fish
1Foster 2005; 2Gilmore 1909; 3Gilmore 1914; 4Marsh 1879; 5Marsh 1881; 6Marsh 1884; 7Marsh 1887; 8Marsh 1889; 9Marsh 1894; 10Marsh 1881; 11Ostrom and McIntosh 1999