Lakes Quarry 10, Morrison (YPM): Kimmeridgian - Tithonian, Colorado
collected by A. Lakes 1877–1903

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Allosaurus sp. Marsh 1877
Ostrom and McIntosh 1999 1 individual
Apatosaurus laticollis n. sp. Marsh 1879
Marsh 1879 1 individual
synonym of Apatosaurus louisae
YPM 1861
Apatosaurus ajax n. gen., n. sp. Marsh 1877
1 individual
YPM 1860 (2 measurements)
Atlantosaurus immanis n. sp. Marsh 1878
Marsh 1878 1 individual
nomen dubium belonging to Apatosaurinae
YPM 1840; supposedly found with gastroliths (1 measurement)
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
Ostrom and McIntosh 1999
synonym of Testudines
see common names

Geography
Country:United States State/province:Colorado County:Jefferson
Coordinates: 39.7° North, 105.2° West (view map)
Paleocoordinates:35.1° North, 52.0° West
Basis of coordinate:estimated from map
Altitude:1828 meters
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Late/Upper Jurassic
*Period:Late/Upper Jurassic *Epoch:Malm
*International age/stage:Kimmeridgian - Tithonian
Key time interval:Kimmeridgian - Tithonian
Age range of interval:154.80000 - 145.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Morrison Member:Brushy Basin
Stratigraphic resolution:group of beds
Stratigraphy comments: two layers; upper middle part of formation
Lithology and environment
Primary lithology:black mudstone
Secondary lithology:yellow sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: black mudstone and buff sandstone beds
Environment:"channel"
Geology comments: channel deposit in a poorly drained floodplain environment; fossils from both layers
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Disassociated major elements:all
Encrustation:none
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:YPM
Collectors:A. Lakes Collection dates:1877–1903
Metadata
Also known as:A. laticollis type, Dinosaur Ridge
Database number:13341
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2002-02-28 11:59:14 Last modified:2021-09-24 11:00:43
Access level:the public Released:2002-02-28 11:59:14
Creative Commons license:CC BY
Reference information

Primary reference:
7811. O. C. Marsh. 1877. Notice of new dinosaurian reptiles from the Jurassic formation. American Journal of Science and Arts 14:514-516 [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]
55546 G. L. Cannon. 1906. Sauropodan gastroliths. Science, new series 24(604):116 [M. Carrano/M. Carrano]
34682 D. G. Darby and R. W. Ojakangas. 1980. Gastroliths from an Upper Cretaceous plesiosaur. Journal of Paleontology 54(3):548-556 [M. Carrano/H. Street]
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]
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]
19045ETE K. J. Houck. 2001. Sedimentology and stratigraphy of the Morrison Formation in the Dinosaur Ridge area near Morrison, Colorado. The Mountain Geologist 38(3):97-110 [M. Carrano/M. Carrano]
19042ETE J. F. Hubert and P. T. Panish. 2000. Sedimentology and diagenesis of the dinosaur bones exposed at Dinosaur Ridge along Alameda Parkway in the Morrison Formation (Upper Jurassic), Morrison, Colorado. The Mountain Geologist 37(2):73-90 [M. Carrano/M. Carrano]
54331 R. S. Lull. 1926. Early fossil hunting in the Rocky Mountains. Natural History 26(5):455-461 [M. Carrano/M. Carrano]
7813 O. C. Marsh. 1878. Notice of new dinosaurian reptiles. American Journal of Science and Arts 15:241-244 [M. Carrano/M. Carrano/M. Carrano]
59815% 51100O. C. Marsh. 1879. Principal characters of American Jurassic dinosaurs. Part II. American Journal of Science, Series 3 17:86-92 [M. Carrano/M. Carrano/J. Alroy]
78169 O. C. Marsh. 1897. Vertebrate fossils of the Denver Basin. United States Geological Survey Monograph 27:473-527 [M. Carrano/M. Carrano/M. Carrano]
19044ETE P. J. Modreski. 2001. Geochemical and mineralogical studies of dinosaur bone from the Morrison Formation at Dinosaur Ridge. The Mountain Geologist 38(3):111-118 [M. Carrano/M. Carrano]
10618 J. H. Ostrom and J. S. McIntosh. 1999. Marsh's Dinosaurs: The Collections from Como Bluff. Yale University Press, New Haven 1-388 [M. Carrano/M. Carrano/M. Carrano]
55026 E. Tschopp, O. Mateus, and R. B. J. Benson. 2015. A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda). PeerJ 3:e857 [P. Mannion/P. Mannion]
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]
61465 S. W. Williston. 1915. The first discovery of dinosaurs in the west. In W. D. Matthew (ed.), Dinosaurs. American Museum of Natural History Handbook 5:124-131 [M. Carrano/M. Carrano]