| 词条 | Lakota Formation | ||||||||||||||||||||||||||||
| 释义 |
| name = Lakota Formation | image = | caption = | type = Geological formation | age = {{fossilrange|Berriasian|Barremian|Berriasian-Barremian}} | period = Lower Cretaceous | prilithology = Sandstone | otherlithology = Shale, Coal, Conglomerate | namedfor = Lakota Native American tribe | namedby = Darton | year_ts = 1899 | region = North America | country = {{Flag|United States}} | coordinates = | unitof = | subunits = Chilson Member. Fuson Member | underlies = Fall River Formation | overlies = Morrison Formation | thickness = {{Convert|200 to 500|ft|m|-1}} | extent = | area = | map = | map_caption = }} The Lakota Formation is a sequence of rocks of early Cretaceous (Berriasian to Barremian) age from Western North America. Located in South Dakota, the name of the formation is derived from the Lakota Native American tribe. There are two units of the Lakota Formation, the Chilson Member (upper Berriasian to Valanginian) and the underlying Fuson Member (upper Valanginian to early Barremian). A Berriasian-Valanginian age for the Chilson Member has been extrapolated by means of ostracods and charophytes.[1] Vertebrate paleofaunaArchosaurs
Mammals
References1. ^Sames, B., Cifelli, R.L., and Schudack, M. 2010. The nonmarine Lower Cretaceous of the North American Western Interior foreland basin: new biostratigraphic results from ostracod correlations, and their implications for paleontology and geology of the basin—an overview. Earth-Science Reviews 101: 207–224. {{Portal|Cretaceous|Paleontology|South Dakota||}}{{SouthDakota-geologic-formation-stub}}2. ^"Table 19.1," in Weishampel, et al. (2004). Page 416. 3. ^"Table 17.1," in Weishampel, et al. (2004). Page 366. 4. ^Gilmore, C.W., 1909. Osteology of the Jurassic reptile Camptosaurus, with a revision of the species of the genus, and description of two new species. Proceedings of the U.S. National Museum 36: 197-332. 5. ^McDonald, A.T., 2011. The taxonomy of species assigned to Camptosaurus (Dinosauria: Ornithopoda). Zootaxa 2783: 52-68. 6. ^M.D. D'Emic & J.R. Foster (2014) The oldest Cretaceous North American sauropod dinosaur. Historical Biology (advance online publication) DOI:10.1080/08912963.2014.976817 http://www.tandfonline.com/doi/full/10.1080/08912963.2014.976817#.VGofevnF_To 7. ^1 2 3 Cifelli, R.L., Davis, B.M., and Sames, B. 2014. Earliest Cretaceous mammals from the western United States. Acta Palaeontologica Polonica 59 (1): 31–52. 5 : Cretaceous geology of South Dakota|Cretaceous Manitoba|Cretaceous geology of Nebraska|Lower Cretaceous Series of North America|Geologic formations of South Dakota |
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