Silberling Quarry
Basic information
Sample name: Silberling Quarry
Sample aka: Crazy Mountains Basin Loc. 1
Reference: G. G. Simpson. 1937. The Fort Union of the Crazy Mountain Field, Montana, and its mammalian faunas. Bulletin of the United States National Museum 169:1-287 [ER 4101]
Geography
Country: United States
State: Montana
County: Sweetgrass
Coordinate: 46.20° N, -109.76° W
Coordinate basis: stated in text
Scale: quarry
Formation: Fort U.nion
Time interval: Early Palaeocene
Zone: Torrejonian
Section: CMB
Unit number: 2
Unit order: below to above
Max Ma: 63.537
Min Ma: 62.53
Age basis: paleomag
Geography comments: "NE1/4SW1/4 sec. 5, T. 5 N., R. 16 E." and "near the middle of the east side of Bear Butte about 75 feet below the base of the No. 3 sandstone" with bones from "a zone 1 or 1 1/4 feet in thickness" and 1,265 feet above the base of the FortNo. 1
the No. 2 beds are correlated with the Torrejon in New Mexico (i.e., are Torrejonian)
chron 27R according to Butler et al. (1987) (age assignment based on Ogg 2020)
the No. 2 beds are correlated with the Torrejon in New Mexico (i.e., are Torrejonian)
chron 27R according to Butler et al. (1987) (age assignment based on Ogg 2020)
Environment
Lithology: shale
Habitat comments: mammal localities in this area in general are "almost entirely on the rarer shale exposures... seldom as much as a hundred yards in diameter and generally much less... Nothing approaching a complete skeleton has ever been found" in the field area and there are hardly any associations
the quarry is from "a fine greenish tuff or shale, very tough and harsh... It grades laterally into a bed with numerous fresh-water bivavles"
the quarry is from "a fine greenish tuff or shale, very tough and harsh... It grades laterally into a bed with numerous fresh-water bivavles"
Methods
Life forms: carnivores,primates,ungulates,other large mammals,other small mammals
Sampling methods: quarry
Sample size: 57 specimens
Years: 1902, 1908, 1935
Museum: UNSM
Sampling comments: all of the data for this sample are based on Simpson (1937): it was not reanalysed by Rose (1981)
"located, as a surface prospect, by Mr. [Albert C.] Silberling in 1902" and he "made a small collection that formed the basis of Douglass' publication in 1908. In 1908 Silberling opened the quarry for the National Museum and then collected most of the specimens... in 1935 the Third Scarritt Expedition reopened the quarry and worked it for a few days"
there are "Gar scales (Lepisosteus sp.)"
Arctocyon ferox is also present according to Ribgy (1980)
Gilmore (1928) "mentioned" Peltosaurus sp. and named Harpagosaurus excedens from this quarry, and "Lizard remains are fairly common"
counts are of upper and lower jaws only: all species are known from at least one
"located, as a surface prospect, by Mr. [Albert C.] Silberling in 1902" and he "made a small collection that formed the basis of Douglass' publication in 1908. In 1908 Silberling opened the quarry for the National Museum and then collected most of the specimens... in 1935 the Third Scarritt Expedition reopened the quarry and worked it for a few days"
there are "Gar scales (Lepisosteus sp.)"
Arctocyon ferox is also present according to Ribgy (1980)
Gilmore (1928) "mentioned" Peltosaurus sp. and named Harpagosaurus excedens from this quarry, and "Lizard remains are fairly common"
counts are of upper and lower jaws only: all species are known from at least one
Metadata
Sample number: 4524
Contributor: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-11-30 01:22:48
Modified: 2024-11-30 10:45:57
Abundance distribution
24 species
17 singletons
total count 57
geometric series index: 113.7
Fisher's α: 15.616
geometric series k: 0.8841
Hurlbert's PIE: 0.8694
Shannon's H: 2.6111
Good's u: 0.7024
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Ptilodus montanus | 17 | |
| Ptilodus douglassi = †Baiotomeus douglassi | 1 | |
| Ptilodus sinclairi = †Parectypodus sinclairi | 4 | |
| plus 1 Ptilodus sp. | ||
| Ectypodus russelli = †Anconodon cochranensis | 1 | |
| Eucosmodon sparsus = †Stygimys jepseni | 1 | |
| †Gelastops parcus | 1 | |
| Bessoecetor diluculi = †Bessoecetor septentrionalis | 1 | |
| †Aphronorus fraudator | 3 | |
| †Eudaemonema cuspidata | 1 | |
| †Elpidophorus minor | 1 | |
| †Picrodus silberlingi | 1 | |
| includes the type of Megopterna minuta of Douglass 1908 | ||
| †Paromomys maturus | 1 | |
| †Palaechthon alticuspis | 1 | |
| Huerfanodon sp. | 1 | |
| "Conoryctes comma": compared to Huerfanodon by Schoch 1986 | ||
| †Psittacotherium multifragum | 1 | |
| †Prothryptacodon furens | 1 | |
| Metachriacus punitor = †Chriacus punitor | 3 | |
| Mimotricentes latidens = †Mimotricentes subtrigonus | 3 | |
| includes the type of Mimotricentes angustidens | ||
| Didymictis microlestes = †Bryanictis microlestes | 2 | |
| Didymictis haydenianus = †Protictis haydenianus | 1 | |
| Dissacus sp. | 1 | |
| Ellipsodon aquilonius = †Promioclaenus acolytus | 8 | |
| Tetraclaenodon symbolicus = †Tetraclaenodon puercensis | 1 | |
| †Coriphagus montanus | 1 | |