Greasewood Creek: Lancian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Rajiformes
- Rhinobatidae
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Myledaphus bipartitus
Cope 1876
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Acipenseriformes
- Acipenseridae
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Acipenser eruciferus
(Cope 1876)
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Actinopteri
- Amiiformes
- Amiidae
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Amia fragosa
Jordan 1927
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Actinopteri
- Lepisosteiformes
- Lepisosteidae
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Atractosteus occidentalis
(Leidy 1856)
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original and current combination Lepidotus occidentalis | ||||||||||
Actinopteri
- Aspidorhynchiformes
- Aspidorhynchidae
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Belonostomus longirostris
(Lambe 1902)
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Amphibia
- Temnospondyli
- Urodela
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Scapherpeton tectum
Cope 1876
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Habrosaurus dilatus
Gilmore 1928
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Amphibia
- Temnospondyli
- Batrachosauroididae
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Opisthotriton kayi
Auffenberg 1961
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Reptilia
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Paronychodon lacustris
Cope 1876
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nomen dubium belonging to Paronychodon | ||||||||||
Reptilia
- Tyrannosauridae
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cf. Albertosaurus sp.
Osborn 1905
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Reptilia
- Ceratopsidae
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cf. Triceratops sp.
Marsh 1889
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Reptilia
- Hadrosauridae
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cf. Edmontosaurus sp.
Lambe 1917
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Reptilia
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cf. Thescelosaurus sp.
Gilmore 1913
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Leidyosuchus sternbergi
(Gilmore 1910)
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recombined as Borealosuchus sternbergii | ||||||||||
Reptilia
- Crocodylidae
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Crocodylidae indet.
Cuvier 1807
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Reptilia
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Brachychampsa montana
Gilmore 1911
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Champsosaurus sp.
Cope 1876
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Reptilia
- Testudines
- Trionychidae
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Trionychidae indet.
Gray 1825
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Reptilia
- Testudines
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cf. Helopanoplia distincta
Hay 1908
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Reptilia
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Compsemys victa
(Leidy 1856)
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Reptilia
- Baenidae
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cf. Baenidae indet.
Cope 1882
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Mammalia
- Pediomyidae
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Pediomys cf. krejcii
Clemens 1966
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recombined as Leptalestes krejcii | ||||||||||
(1 measurement) | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Wyoming | County: | Niobrara |
Coordinates: | 43.3° North, 104.4° West (view map) | ||||
Paleocoordinates: | 49.7° North, 79.2° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
*Period: | Late/Upper Cretaceous | *Epoch: | Late/Upper Senonian | *Local age/stage: | Lancian |
Key time interval: | Lancian | ||
Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Lance |
Stratigraphic resolution: | member |
Lithology and environment
Primary lithology: | "cross stratification",gray poorly lithified sandstone |
Lithology description: "yellowish-gray, well sorted and rounded, medium to coarse-grained quartz sandstone... usually friable" | |
Environment: | fluvial indet. |
Geology comments: "relatively high-energy aqueous environment... cross-bedding and scour features, suggest a fluvial origin" |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Disassociated minor elements: | many |
Collection methods and comments
Collection methods: | surface (float) |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | SDSM |
Collection method comments: "surface prospecting" of a blowout |
Metadata
Also known as: | SDSM V-685 | ||
Database number: | 14557 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | J. Alroy | Research group: | vertebrate |
Created: | 2002-05-15 00:00:00 | Last modified: | 2002-12-06 18:59:53 |
Access level: | the public | Released: | 2002-05-15 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
774. | J. L. Whitmore and J. E. Martin. 1986. Vertebrate fossils from the Greasewood Creek locality in the Late Cretaceous Lance Formation of Niobrara County, Wyoming. Proceedings of the South Dakota Academy of Sciences 65:33-50 [J. Alroy/M. Sommers] |