Kirkland Egg site, FPA: Late/Upper Kimmeridgian - Early/Lower Tithonian, Colorado
collected by J. Kirkland 1991

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Dryosauridae
Dryosaurus sp. Marsh 1894
Kirkland 1994 200 specimens
Reptilia - Prismatoolithidae
Prismatoolithus coloradensis Hirsch 1994
Hirsch 1994 1 specimen
recombined as Preprismatoolithus coloradensis
Reptilia - Shartegosuchidae
Mesosuchia indet. Huxley 1875
Kirkland 1994
    = Fruitachampsa callisoni Clark 2011
Foster et al. 2016
Reptilia - Testudines
Testudines indet. Batsch 1788
Kirkland 1994
see common names

Geography
Country:United States State/province:Colorado County:Mesa
Coordinates: 39.1° North, 108.8° West (view map)
Paleocoordinates:35.3° North, 55.6° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Key time interval:Late/Upper Kimmeridgian - Early/Lower Tithonian
Age range of interval:152.20000 - 146.30000 m.y. ago
Stratigraphy
Formation:Morrison Member:Salt Wash
Stratigraphic resolution:bed
Stratigraphy comments: 3.6 m below the local "clay change" in the lower Brushy Basin, above the top of the Salt Wash Member.
Lithology and environment
Primary lithology:bioturbation,paleosol/pedogenic,concretionary,gray carbonaceous mudstone
Includes fossils?Y
Lithology description: "Fossils are generally encased in small carbonate nodules. These nodules are associated with root casts in a drab, gray mudstone indicating that the fossils were perserved b soil forming processes.""in the illitic clays"
Environment:"floodplain"
Geology comments: overbank/floodplain
Taphonomy
Modes of preservation:body,concretion,replaced with calcite
Degree of concentration:concentrated
Size of fossils:macrofossils,mesofossils
Associated major elements:some
Disassociated major elements:some
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:paleoecologic analysis
Museum repositories:LACM
Collectors:J. Kirkland Collection dates:1991
Metadata
Also known as:Fruita, CO-34, Nesting Site, MWC #5
Database number:53022
Authorizer:M. Carrano Enterer:K. Maguire, M. Carrano
Modifier:G. Varnham Research group:vertebrate
Created:2005-08-31 12:26:15 Last modified:2022-02-07 06:05:16
Access level:the public Released:2005-08-31 12:26:15
Creative Commons license:CC BY
Reference information

Primary reference:
14694.ETE D. J. Chure, J. I. Kirkland, and R. D. Scheetz. 1993. Embryos, hatchlings, juveniles & adults of the ornithopod dinosaur Dryosaurus from the Late Jurassic Morrison Formation (MF). Journal of Vertebrate Paleontology 13(3, suppl.):29A-30A [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

15174ETE E. S. Bray and K. F. Hirsch. 1998. Eggshell from the Upper Jurassic Morrison Formation. Modern Geology 23(1-4):219-240 [M. Carrano/M. Carrano]
61877 J. R. Foster, J. B. McHugh, J. E. Peterson and M. F. Leschin. 2016. Major bonebeds in mudrocks of the Morrison Formation (Upper Jurassic), northern Colorado Plateau of Utah and Colorado. Geology of the Intermountain West 3:33-66 [M. Carrano/M. Carrano]
14216ETE K. F. Hirsch. 1994. Upper Jurassic eggshells from the Western Interior of North America. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge 137-150 [M. Carrano/M. Carrano/M. Carrano]
14332ETE J. I. Kirkland. 1994. Predation of dinosaur nests by terrestrial crocodilians. K. Carpenter, K.F. Hirsch & J.R. Horner (eds.) Dinosaur Eggs and Babies. Cambridge University Press, Cambridge 124-133 [M. Carrano/K. Maguire/M. Carrano]
58788 J. I. Kirkland. 1997. Fruita Paleontological Area. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 254-256 [M. Carrano/M. Carrano]
65150 J. I. Kirkland. 2006. Fruita Paleontological Area (Upper Jurassic, Morrison Formation), western Colorado: an example of terrestrial taphofacies analysis. In J. R. Foster & S. G. Lucas (ed.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:67-95 [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]