Cedar Point Quarry
Basic information
Sample name: Cedar Point Quarry
Reference: K. D. Rose. 1981. The Clarkforkian land-mammal age and mammalian faunal composition across the Paleocene-Eocene boundary. University of Michigan Papers on Paleontology 26:1-197 [ER 4102]
Geography
Country: United States
State: Wyoming
County: Big Horn
Coordinate: 44.72° N, -108.39° W
Coordinate basis: stated in text
Scale: quarry
Formation: Polecat Bench
Time interval: Late Palaeocene
Zone: Tiffanian
Ma: 58.1
Age basis: AEO
Geography comments: "about 9 miles south of Lovell" in "SW1/4, sec. 23, T.55 N., R.96 W."
not located in the main Polecat Bench section, and "its stratigraphic position... is based mainly on the fauna"
however, it is at the same level as Jepsen Quarry and below Croc Tooth Quarry and Divide Quarry according to Gingerich (1976)
not located in the main Polecat Bench section, and "its stratigraphic position... is based mainly on the fauna"
however, it is at the same level as Jepsen Quarry and below Croc Tooth Quarry and Divide Quarry according to Gingerich (1976)
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit
Habitat comments: "in a clay-gall sandstone at the base of a thick channel sand. The productive layer is, in most places, only a few inches thick, and it lies immediately above a floodplain clay... This bed appears to have been deposited very rapidly as a result of relocation of a channel during its meandering across the floodplain"
Methods
Life forms: carnivores,primates,ungulates,other large mammals,other small mammals
Sampling methods: quarry
Sample size: 1970 specimens
Years: 1967 - 1972, 1974, 1975, 1978
Museum: Princeton University, UMMP, Yale University
Sampling comments: discovered by Robert Witter and Albert Silberling "in the late 1940s... The site was worked periodically during the ensuing decades, but it was not intensively quarried until 1967. Thereafter, Princeton parties devoted a major part of each field season through 1972 to excavations... Parties from the University of Michigan and Yale briefly worked the site together in 1974, and University of Michigan parties led by P. D. Gingerich spent parts of the 1975 and 1978 seasons collecting"
"fishes, turtles, lizards, crocodilians, champsosaurs, salamanders, and birds" are also present
minor changes to the counts were presented by Secord (2008)
"fishes, turtles, lizards, crocodilians, champsosaurs, salamanders, and birds" are also present
minor changes to the counts were presented by Secord (2008)
Metadata
Sample number: 4528
Contributor: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-11-30 10:43:43
Modified: 2024-12-06 10:59:40
Abundance distribution
40 species
5 singletons
total count 1970
geometric series index: 54.1
Fisher's α: 7.107
geometric series k: 0.8422
Hurlbert's PIE: 0.7820
Shannon's H: 2.1438
Good's u: 0.9975
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Ptilodus kummae | 329 | |
| Gunnell (1994): "Ptilodus sp." | ||
| †Neoplagiaulax hunteri | 3 | |
| †Neoplagiaulax jepi | 17 | |
| Sloan (1987): "Neoplagiaulax sp." said to be new | ||
| †Ectypodus cf. powelli | 4 | |
| †Peradectes elegans | 5 | |
| Palaeoryctes sp. | 7 | |
| cf. | ||
| †Myrmecoboides arenarius | 3 | |
| Secord (2008): type; "Myrmecoboides sp." | ||
| †Bessoecetor cf. pilodontus | 12 | |
| Secord (2008): "Propalaeosinopa cf. diluculi" | ||
| †Leptonysson orthius | 7 | |
| Secord (2008): type; "? Propalaeosinopa sp." | ||
| Niphredil radagasti = †Paleotomus radagasti | 7 | |
| Van Valen (1978): new; "Pantolestidae indet" said to be new | ||
| †Labidolemur soricoides | 10 | |
| Erinaceomorpha indet. | 2 | |
| Secord (2008): "Proteutheria indet." | ||
| †Leptacodon acherontus | 3 | |
| Secord (2008): type | ||
| †Leptacodon cf. munusculum | 9 | |
| includes "Leptacodon cf. tener" of Rose according to Secord (2008) | ||
| †Cedrocherus ryani | 1 | |
| Gingerich (1983): apparently not known to Rose | ||
| Diacocherus meizon = †Adunator meizon | 23 | |
| Gingerich (1983): new; "Mckennatherium cf. ladae" | ||
| †Litocherus zygeus | 68 | |
| Gingerich (1983): "Litolestes sp." said to be new | ||
| †Elpidophorus elegans | 1 | |
| Microsyopidae indet. | 1 | |
| ?: omitted by Secord (2008) | ||
| †Plesiadapis rex | 811 | |
| †Carpodaptes hazelae | 77 | |
| †Ignacius frugivorus | 20 | |
| †Picrodus cf. silberlingi | 4 | |
| †Chriacus oconostotae | 3 | |
| Van Valen (1978): type; "cf. Chriacus sp." | ||
| †Mimotricentes fremontensis | 2 | |
| Van Valen (1978): "? Mimotricentes sp." | ||
| †Thryptacodon australis | 152 | |
| Aphanocyon amaurus | 14 | |
| Secord (2008): type; "Claenodon ferox"; Colpoclaenus keeferi of Van Valen (1978) | ||
| †Arctocyon cf. mumak | 6 | |
| Secord (1978): "Claenodon cf. acrogenius" | ||
| †Phenacodus grangeri | 99 | |
| †Ectocion cedrus | 181 | |
| Thewissen (1990): type; "Ectocion wyomingensis" | ||
| †Aletodon quadravus | 14 | |
| Gingerich (1983): presumably "Litomylus sp. A" and "Litomylus sp. B", plus "Haplaletes cf. serior" of Van Valen (1978); see also Secord (2008) | ||
| †Bisonalveus holtzmani | 1 | |
| Gingerich (1983): type; "cf. Protoselene sp." | ||
| †Dissacus cf. navajovius | 3 | |
| Secord (2008): "Dissacus sp."; "Dissacus cf. praenuntius" of Van Valen (1978) | ||
| Pachyaena sp. | 1 | |
| ?: Secord (2008) | ||
| †Caenolambda jepseni | 5 | |
| †Titanoides gidleyi | 20 | |
| plus 9 "pantodonts, indet." | ||
| †Tytthaena parrisi | 3 | |
| new | ||
| †Protictis agastor | 10 | |
| Gingerich and Winkler (1985): new; "Protictis cf. haydenianus" | ||
| †Protictis cf. paralus | 20 | |
| †Raphictis gausion | 12 | |
| Gingerich and Winkler (1985): type; "Protictis sp." | ||