MPM locality 3850 (Hell Creek Formation): Maastrichtian, Montana

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Pachycephalosauridae
Stenotholus kohleri n. gen., n. sp. Giffin et al. 1988
1 specimen
synonym of Pachycephalosaurus wyomingensis
MPM 7111
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
see common names

Country:United States State/province:Montana County:McCone
Coordinates: 47.7° North, 106.2° West (view map)
Paleocoordinates:54.5° North, 78.6° West
Basis of coordinate:stated in text
Altitude:731 meters
Geographic resolution:outcrop
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
*Period:Late/Upper Cretaceous *Epoch:Senonian
*International age/stage:Maastrichtian - Maastrichtian *Local age/stage:Tithonian
Key time interval:Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Formation:Hell Creek
Stratigraphic resolution:bed
Stratigraphy comments: Middle Hell Creek. Approx. 100 feet above Fox Hills Sandstone/Hell Creek Fm contact, somewhat beneath the middle of the 250-280 feet of Hell Creek Fm east of the Fort Peck Reservoir.
Lithology and environment
Primary lithology:green,yellow sandstone
Secondary lithology:green,yellow siltstone
Lithology description: green to buff fine-grained sandstone and siltstone
Glacial or sequence phase:regressive
Geology comments: "flat bedding and silty to sandy grain size..suggest sediments deposited lateral to a fluvial channel."
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Disassociated major elements:some
Disassociated minor elements:some
Collection methods and comments
Collection methods:surface (float),field collection,survey of museum collection
Reason for describing collection:taxonomic analysis
Database number:12977
Authorizer:J. Alroy Enterer:R. Whatley
Modifier:M. Carrano Research group:vertebrate
Created:2002-01-12 17:01:11 Last modified:2005-09-18 21:11:38
Access level:the public Released:2002-01-12 17:01:11
Creative Commons license:CC BY
Reference information

Primary reference:

4306.5% 13800E. B. Giffin, D. L. Gabriel, and R. E. Johnson. 1988. A new pachycephalosaurid skull (Ornithischia) from the Cretaceous Hell Creek Formation of Montana. Journal of Vertebrate Paleontology 7(4):398-407 [J. Alroy/R. Whatley/J. Alroy]

Secondary references:

14453ETE R. M. Sullivan. 2003. Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauridae). Journal of Vertebrate Paleontology 23(1):181-207 [M. Carrano/M. Carrano/M. Carrano]