Nail Quarry, Como Bluff: Kimmeridgian - Tithonian, Wyoming
collected by D. Kralis & R. T. Bakker 1990-1991

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
? Nestoria sp.
Connely 2002 3 individuals
Reptilia
Opisthias sp. Gilmore 1909
Connely 2002 1 individual
Reptilia - Megalosauridae
Edmarka rex n. gen., n. sp. Bakker et al. 1992
5 specimens
synonym of Torvosaurus tanneri
TATE 1002, 1005-6
Reptilia
Allosaurus sp. Marsh 1877
Turner and Peterson 1999 3 individuals
45 shed teeth "counted as 3 individuals" but also "up to 11 individuals" listed in same table
Reptilia - Stegosauridae
Stegosaurus sp. Marsh 1877
Turner and Peterson 1999 1 individual
Reptilia - Camarasauridae
Camarasaurus sp. Cope 1877
Turner and Peterson 1999 2 individuals
"up to 14 indivudals"
Reptilia
Apatosaurus sp. Marsh 1877
Turner and Peterson 1999 1 individual
TATE 099-1 (incl. skull)
    = Apatosaurus excelsus Marsh 1879
Connely 2002
original and current combination Brontosaurus excelsus
Diplodocus sp. Marsh 1878
Turner and Peterson 1999 1 individual
juvenile; "up to 14 individuals"
Reptilia - Crocodylia
Crocodylia indet. (Owen 1842)
Foster 2003 1 individual
see common names

Geography
Country:United States State/province:Wyoming County:Albany
Coordinates: 41.9° North, 106.0° West (view map)
Paleocoordinates:37.5° North, 52.2° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Key time interval:Kimmeridgian - Tithonian
Age range of interval:154.80000 - 145.00000 m.y. ago
Stratigraphy
Formation:Morrison Member:Talking Rocks
Local section:Nail-Louise Local bed:48 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: "Talking Rocks Member" near middle of formation; located just above caliche boundary in Unit B.
Lithology and environment
Primary lithology:fine,gray,green calcareous claystone
Includes fossils?Y
Lithology description: "gray smectitic claystone with some limestone"; "fine greenish-gray blocky mudstone"
Environment:wet floodplain
Geology comments: "Carlin Facies", poorly drained floodplain
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:medium
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:occasional
Feeding/predation traces:tooth marks
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:D. Kralis & R. T. Bakker Collection dates:1990-1991
Metadata
Also known as:WY-39, WDIS Quarry 2b
Database number:49627
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2005-04-21 06:42:06 Last modified:2023-09-01 12:15:12
Access level:the public Released:2005-04-21 06:42:06
Creative Commons license:CC BY
Reference information

Primary reference:
13292.ETE 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]

Secondary references:

65427 R. T. Bakker. 1996. The real Jurassic park: dinosaurs and habitats at Como Bluff, Wyoming. In M. Morales (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60:35-49 [M. Carrano/M. Carrano]
85752 R. T. Bakker. 2000. Brontosaur killers: Late Jurassic allosaurids as sabre-tooth cat analogues. Gaia 15:145-158 [M. Carrano/M. Carrano]
85332 M. V. Connely. 2002. Stratigraphy and Paleoecology of the Morrison Formation, Como Bluff, Wyoming 1-109 [M. Carrano/M. Carrano]
15179ETE J. R. Foster. 2003. Paleoecological analysis of the vertebrate fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain region, U.S.A. New Mexico Museum of Natural History and Science Bulletin 23:1-95 [M. Carrano/M. Carrano]
19565ETE J. R. Foster. 2005. New juvenile sauropod material from western Colorado, and the record of juvenile sauropods from the Upper Jurassic Morrison Formation. In K. Carpenter and V. Tidwell (eds.), Thunder-Lizards: The Sauropodomorph Dinosaurs. Indiana University Press, Bloomington 141-153 [M. Carrano/M. Carrano/M. Carrano]
69484 J. R. Foster and J. E. Peterson. 2016. First report of Apatosaurus (Diplodocidae: Apatosaurinae) from the Cleveland-Lloyd Quarry in the Upper Jurassic Morrison Formation of Utah: abundance, distribution, paleoecology, and taphonomy of an endemic North American sauropod clade. Palaeoworld 25:431-443 [M. Carrano/M. Carrano]
49550 M. Hanson and P. J. Makovicky. 2013. A new specimen of Torvoaurus tanneri originally collected by Elmer Riggs. Historical Biology 26(6):775-784 [P. Mannion/J. Tennant/M. Carrano]
14966ETE C. A. Miles and D. W. Hamblin. 1999. Historical update: paleontological excavation in the Como Region. In J. H. Ostrom & J. S. McIntosh, Marsh's Dinosaurs. Yale University Press, New Haven vii-xiv [M. Carrano/M. Carrano]
13281ETE C. E. Turner and F. Peterson. 1999. Biostratigraphy of dinosaurs in the Upper Jurassic Morrison Formation of the Western Interior, U.S.A. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:77-114 [M. Carrano/M. Carrano/M. Carrano]