Alameda Parkway Morrison dinosaur site: Kimmeridgian - Tithonian, Colorado

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Dinosauria
Dinosauria indet. Owen 1842
Reptilia - Camarasauridae
Camarasaurus sp. Cope 1877
Modreski 2001
Reptilia - Theropoda
? Theropoda indet. Marsh 1881
Modreski 2001
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:based on nearby landmark
Geographic resolution:small collection
Time
Period: Jurassic Epoch: Late Jurassic
Stage: Kimmeridgian - Tithonian 10 m.y. bin: Jurassic 5 - Jurassic 6
Key time interval: Kimmeridgian - Tithonian
Age range of interval: 154.8 - 145 m.y. ago
Stratigraphy
Formation:Morrison Member:Brushy Basin
Stratigraphic resolution:bed
Stratigraphy comments: presumably laterally continuous with Lakes Quarry 5 (now destroyed); bones present in one layer, the second of four stories in the section
Lithology and environment
Primary lithology:current ripples,"cross stratification",medium,pebbly lithified sandstone
Lithology description: "The bone layer is a coset of trough crossbed sets. The lowest sets usually contain pebbles of gray mudstone and granules of crystalline rocks. Paleoflow was southeast...Most of the crossbed sets are medium-grained sandstone, but fluctuations in current velocity are recorded by sets of pebbly coarse sandstone near the middle of the bone layer."
Environment:channel lag Tectonic setting:foreland basin
Taphonomy
Modes of preservation:body
Lagerst�tten type:concentrate
Degree of concentration:-seasonal
Size of fossils:macrofossils
Spatial orientation:preferred
Preservation of anatomical detail:variable
Disassociated major elements:many
Disassociated minor elements:many
Size sorting:medium
Fragmentation:frequent
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:surface (float),surface (in situ),mechanical,peel or thin section,field collection,observed (not collected)
Reason for describing collection:taphonomic analysis
Metadata
Database number:66909
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2006-10-23 12:06:26 Last modified:2006-10-23 16:43:35
Access level:the public Released:2006-10-23 12:06:26
Creative Commons license:CC BY
Reference information

Primary reference:
19042.ETE 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]

Secondary references:

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]