Lake Basin, Big Lake (PU): Late/Upper Campanian, Montana
collected by E. Douglass 1901
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Coniferales
- Cupressaceae
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Sequoia sp.
Endlicher 1847
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Douglass 1902 | |||||||||
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Chondrichthyes
- Lamniformes
- Anacoracidae
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Squalicorax pristodontus
(Agassiz 1835)
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Horner 1979 | 3 elements | ||||||||
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Actinopteri
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Teleostei indet.
Müller 1846
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Horner 1979 | |||||||||
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Reptilia
- Mosasauridae
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Mosasauridae indet.
Gervais 1852
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Horner 1979 | |||||||||
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Reptilia
- Hadrosauridae
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Claosaurus sp.
Marsh 1890
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Douglass 1902 | 1 individual | ||||||||
| (1 measurement) | ||||||||||
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= Hadrosaurus notabilis
Lambe 1914
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Horner 1979 | |||||||||
| PU 16970; listed as Hadrosaurus (Kritosaurus) notabilis | ||||||||||
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= Gryposaurus sp.
Lambe 1914
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Prieto-Marquez 2013 | |||||||||
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Claosaurus sp.
Marsh 1890
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Douglass 1902 | 1 individual | ||||||||
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= ? Lambeosaurus magnicristatus
Sternberg 1935
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Horner 1979 | |||||||||
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= Lambeosaurinae indet.
Parks 1923
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Evans and Reisz 2007 | |||||||||
| YPM-PU 21905 | ||||||||||
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Reptilia
- Nodosauridae
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Ceratopsidae indet.
Marsh 1888
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Douglass 1902 | 1 individual | ||||||||
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= Panoplosaurus sp.
Lambe 1919
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Coombs 1978 | |||||||||
| PU 21178 | ||||||||||
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Cephalopoda
- Ammonoidea
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Ammonoidea indet.
Zittel 1884
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Douglass 1902 | |||||||||
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Cephalopoda
- Ammonitida
- Scaphitidae
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Scaphites sp.
Parkinson 1811
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Douglass 1902 | |||||||||
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Cephalopoda
- Ammonitida
- Baculitidae
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Baculites compressus
Say 1920
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Douglass 1902 | |||||||||
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Bivalvia
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Pelecypoda indet.
Goldfuss 1820
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Horner 1979 | |||||||||
| synonym of Bivalvia | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Montana | County: | Stillwater |
| Coordinates: | 45.8° North, 109.1° West (view map) | ||||
| Paleocoordinates: | 52.9° North, 76.3° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
| Key time interval: | Late/Upper Campanian | ||
| Age range of interval: | 83.60000 - 72.10000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Montana | Formation: | Bearpaw Shale | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: from "lower part of Bearpaw Shale"; originally considered "Ft. Pierre Shale" | |||||
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | gray "limestone" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "Dark, soft shales predominate. There are occasional thin bands of sand and many brownish concretions which break into angular fragments. These sometimes contain marine fossils and sometimes a network of calcite seams...Some hard limestone concretions are crowded with these." | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Disassociated minor elements: | some |
| Temporal resolution: | time-averaged |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection excludes: | some genera,species names | ||
| Collection methods: | selective quarrying,mechanical,field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | YPM | ||
| Collectors: | E. Douglass | Collection dates: | 1901 |
Metadata
| Database number: | 26767 | ||
| Authorizer: | M. Carrano, P. Mannion | Enterer: | M. Carrano, J. Tennant |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-10-30 13:47:46 | Last modified: | 2015-03-18 11:51:26 |
| Access level: | the public | Released: | 2002-10-30 13:47:46 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7400. | E. Douglass. 1902. Dinosaurs in the Fort Pierre Shales and underlying beds in Montana. Science 15(366):31-32 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 17480 | ETE | W. P. Coombs. 1978. The families of the ornithischian dinosaur order Ankylosauria. Palaeontology 21(1):143-170 [M. Carrano/M. Carrano/M. Carrano] |
| 13704 | ETE | E. Douglass. 1902. A Cretaceous and lower Tertiary section in south central Montana. Proceedings of the American Philosophical Society 41(170):207-224 [M. Carrano/M. Carrano/M. Carrano] |
| 24881 | ETE | D. C. Evans and R. R. Reisz. 2007. Anatomy and relationships of Lambeosaurus magnicristatus, a crested hadrosaurid dinosaur (Ornithischia) from the Dinosaur Park Formation, Alberta. Journal of Vertebrate Paleontology 27(2):373-393 [M. Carrano/M. Carrano] |
| 7398 | J. R. Horner. 1979. Upper Cretaceous dinosaurs from the Bearpaw Shale (marine) of south-central Montana with a checklist of Upper Cretaceous dinosaur remains from marine sediments in North America. Journal of Paleontology 53(3):566-577 [M. Carrano/M. Carrano/M. Carrano] | |
| 46756 | A. Prieto-Marquez. 2013. Skeletal morphology of Kritosaurus navajovius (Dinosauria: Hadrosauridae) from the Late Cretaceous of the North American south-west, with an evaluation of the phylogenetic systematics and biogeography of Kritosaurini. Journal of Systematic Palaeontology [P. Mannion/J. Tennant/M. Carrano] |