Rock Bench Quarry
Basic information
Sample name: Rock Bench Quarry
Reference: G. L. Jepsen. 1940. Paleocene faunas of the Polecat Bench Formation, Park County, Wyoming: Part I. Proceedings of the American Philosophical Society 83(2):217-340 [ER 4104]
Geography
Country: United States
State: Wyoming
County: Park
Coordinate: 44.88° N, -108.75° W
Coordinate basis: stated in text
Scale: quarry
Formation: Polecat Bench
Time interval: Early Palaeocene
Zone: Torrejonian
Section: Polecat Bench
Unit number: 1
Unit order: below to above
Max Ma: 63.537
Min Ma: 62.53
Age basis: paleomag
Geography comments: "occurs about two hundred feet above the base of the Polecat Bench formation and about seventy feet above the top of the Mantua lentil in sec. 36, T. 57 R. 99 W"
chron 27R according to Butler et al. (1987) (age assignment based on Ogg 2020)
chron 27R according to Butler et al. (1987) (age assignment based on Ogg 2020)
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit
Habitat comments: "in a coarse buff sandstone which... varies from about 9 to 31 feet in thickness... The Rock Bench quarry beds are composed chiefly of coarse sands and small pebbles and flattened clay. They appear to
be a local channel deposit"
said to be a "clay-gall sandstone" (Rose 1981)
be a local channel deposit"
said to be a "clay-gall sandstone" (Rose 1981)
Methods
Life forms: carnivores,primates,ungulates,other large mammals,other small mammals
Sampling methods: quarry
Sample size: 1687 specimens
Museum: Princeton University, UMMP
Sampling comments: the metadata are from Jepsen (1940) except where noted, and the faunal list is from Rose (1981)
"secured by quarrying the basal three inches of the sandstone in an area totaling about three hundred square feet"
"discovered by Dr. G. L. Jepsen of Princeton University in the late 1920s" but "a small number" of fossils "are housed at the University of Michigan Museum of Paleontology"
I am not able to relate the following identifications to Rose's list: Ectypodus aphronorus (Sloan 1987), Baiotomeus douglassi (Krause 1987), Mesodma pygmaea (Krause 1977), Unuchinia diaphanes (new species of Gunnell 1988), Prothryptacodon furens (Van Valen 1978), Mimotricentes subtrigonus (Van Valen 1978)
"secured by quarrying the basal three inches of the sandstone in an area totaling about three hundred square feet"
"discovered by Dr. G. L. Jepsen of Princeton University in the late 1920s" but "a small number" of fossils "are housed at the University of Michigan Museum of Paleontology"
I am not able to relate the following identifications to Rose's list: Ectypodus aphronorus (Sloan 1987), Baiotomeus douglassi (Krause 1987), Mesodma pygmaea (Krause 1977), Unuchinia diaphanes (new species of Gunnell 1988), Prothryptacodon furens (Van Valen 1978), Mimotricentes subtrigonus (Van Valen 1978)
Metadata
Sample number: 4527
Contributor: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-11-30 09:21:54
Modified: 2024-11-30 10:47:39
Abundance distribution
57 species
6 singletons
total count 1687
geometric series index: 74.9
Fisher's α: 11.389
geometric series k: 0.9114
Hurlbert's PIE: 0.9444
Shannon's H: 3.2281
Good's u: 0.9964
Each square represents a species. Square sizes are proportional to counts.
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Register
| Stygimys sp. | 1 | |
| Catopsalis sp. | 1 | |
| †Anconodon gidleyi | 17 | |
| Anconodon russelli = †Anconodon cochranensis | 10 | |
| †Ptilodus wyomingensis | 180 | |
| †Mimetodon cf. silberlingi | 19 | |
| Neoplagiaulacidae indet. 1 | 2 | |
| Neoplagiaulacidae indet. 2 | 28 | |
| †Gelastops parcus | 60 | |
| Palaeoryctidae indet. F | 5 | |
| Palaeoryctidae indet. G | 4 | |
| Myrmecoboides sp. | 3 | |
| Paleictops sp. | 32 | |
| ? | ||
| Leptictidae indet. A | 8 | |
| "Diacodon sp. A" in quotes | ||
| Leptictidae indet. B | 5 | |
| "Diacodon sp. B" in quotes | ||
| Leptictidae indet. | 5 | |
| said to be new | ||
| Aphronorus sp. | 55 | |
| said to be new: referred to Palaeosinopa sp. by Jepsen (1930) | ||
| †Coriphagus cf. encinensis | 1 | |
| †Eudaemonema cuspidata | 23 | |
| †Jepsenella praepropera | 5 | |
| Proteutheria indet. A | 2 | |
| Proteutheria indet. B | 1 | |
| Proteutheria indet. D | 2 | |
| Proteutheria indet. E | 2 | |
| †Leptacodon cf. munusculum | 5 | |
| Mckennatherium cf. ladae = †Adunator cf. ladae | 32 | |
| Mckennatherium sp. | 7 | |
| said to be new | ||
| †Plesiolestes problematicus | 142 | |
| †Palenochtha minor | 9 | |
| †Pronothodectes jepi | 27 | |
| Pronothodectes sp. | 3 | |
| cf. | ||
| †Elphidotarsius cf. florencae | 26 | |
| †Paromomys depressidens | 12 | |
| †Ignacius cf. fremontensis | 6 | |
| misidentified as Ignacius frugivorus and allocated to Cedar Point Quarry by Bown and Rose (1976) | ||
| †Picrodus silberlingi | 26 | |
| †Premnoides douglassi | 1 | |
| Gunnell 1989: primate said to be new by Rose | ||
| †Goniacodon levisanus | 5 | |
| Chriacus orthogonius = †Thryptacodon orthogonius | 88 | |
| "Tricentes cf. punitor": see Van Valen (1978); may also include Van Valen's new Chriacus katrinae | ||
| Mimotricentes sp. | 41 | |
| Chriacus sp. | 91 | |
| cf. | ||
| Arctocyonides montanensis = †Arctocyon montanensis | 105 | |
| "Claenodon spp." of Rose's list, said by him to include multiple species: see Van Valen (1978), who also lists Colpoclaenus ? silberlingi based on these specimens; Arctocyonides montanensis is senior to it according to several later authors | ||
| Arctocyonidae indet. | 3 | |
| small | ||
| †Arctocyon ferox | 1 | |
| Rigby (1980): assumed to include Arctocyonidae indet. (said to be new by Rose) | ||
| †Tetraclaenodon puercensis | 148 | |
| †Haplaletes disceptatrix | 14 | |
| †Litomylus cf. dissentaneus | 106 | |
| †Litaletes ondolinde | 148 | |
| new: see Van Valen (1978); "Litaletes cf. disjunctus" of Rose's list | ||
| Promioclaenus aquilonius = †Promioclaenus acolytus | 76 | |
| †Anisonchus sectorius | 43 | |
| †Dissacus navajovius | 6 | |
| Van Valen (1978): "Dissacus sp." | ||
| †Microclaenodon assurgens | 3 | |
| "Microclaenodon sp.": see Van Valen (1978) | ||
| †Pantolambda cf. cavirictum | 3 | |
| †Huerfanodon polecatensis | 3 | |
| Schoch and Lucas (1981): new; "Conoryctes sp." | ||
| †Protictis haydenianus | 10 | |
| Protictis microlestes = †Bryanictis microlestes | 17 | |
| Protictis cf. tenuis = †Simpsonictis cf. tenuis | 3 | |
| †Simpsonictis pegus | 6 | |
| Gingerich and Winkler (1985): "Protictis sp." said to be new by Rose | ||