Alan Mountain upper member (upper part), Alan Mountain Limestone (Carboniferous of the United States)

Where: Montana (47.4° N, 105.6° W: paleocoordinates 5.8° S, 39.8° W)

• coordinate based on political unit

• basin-level geographic resolution

When: upper Member (Alan Mountain Limestone Formation), Osagean (352.0 - 343.0 Ma)

• "Mississippian, Osage?", upper part horizon

• group of beds-level stratigraphic resolution

Environment/lithology: marine; cherty/siliceous limestone

• "thick bedded ls and dolomitic ls; finely xtalline; irreg. bedding; chert. BA4"

Size class: macrofossils

Primary reference: M. R. Mudge, W. J. Sando, and J. T. Dutro, Jr. 1962. Mississippian Rocks of Sun River Canyon Area, Sawtooth Range, Montana. AAPG Bulletin 46(11):2003-2018 [M. Uhen/J. Ju/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 555: authorized by Jack Sepkoski, entered by Mike Sommers on 14.01.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Mudge et al. 1962"
Show authors, comments, and common names
Anthozoa
 Auloporida - Syringoporidae
Syringopora sp.
Syringopora sp. Goldfuss 1826 tabulate coral
 Stauriida - Aulophyllidae
Rylstonia sp.
Rylstonia sp. Hudson and Platt 1927 horn coral
 Stauriida - Cyathaxoniidae
Cyathaxonia sp.
Cyathaxonia sp. Michelin 1847 horn coral
 Stauriida - Uraliniidae
Enygmophyllum sp., Vesiculophyllum sp.
Enygmophyllum sp. Fomichev 1931 horn coral
Vesiculophyllum sp. Easton 1944 horn coral
 Stauriida - Zaphrentoididae
Homalophyllites sp.
Homalophyllites sp. Easton 1944 horn coral
 Stauriida - Hapsiphyllidae
Zaphrentites sp.
Zaphrentites sp. Hudson 1941 horn coral
Gastropoda
 Streptoneura -
Archaeogastropoda indet.
Archaeogastropoda indet. Thiele 1925 snail
high spired gastropod, not Loxonema
 Euomphalina - Euomphalidae
Straparollus sp.
Straparollus sp. de Montfort 1810 snail
(Euomphalus)
Strophomenata
 Productida - Productidae
Buxtonia sp., Dictyoclostus sp.
Dictyoclostus sp.
2 species
 Strophomenida -
Strophomenida indet.
Strophomenida indet. Opik 1934
orthotetid brachiopod
 Strophomenida - Rafinesquinidae
Leptaena sp.
Leptaena sp. Dalman 1828
 Orthotetida - Schuchertellidae
? Schuchertella sp.
? Schuchertella sp. Girty 1904
originally entered as "? Schuchertella sp."
Rhynchonellata
 Spiriferinida - Dimegelasmidae
Dimegelasma sp.
Dimegelasma sp. Cooper 1942
 Spiriferinida - Syringothyrididae
? Syringothyris sp.
? Syringothyris sp.
originally entered as "? Syringothyris sp."
 Spiriferinida - Punctospiriferidae
? Punctospirifer sp.
? Punctospirifer sp. North 1920
originally entered as "? Punctospirifer sp."
 Spiriferida - Spiriferidae
Spirifer sp.
Spirifer sp. Sowerby 1818
3 species
 Spiriferida - Brachythyrididae
Brachythyris sp.
Brachythyris sp. M'Coy 1844
 Spiriferida - Elythidae
? Torynifer sp.
? Torynifer sp.
originally entered as "? Torynifer sp."
 Athyridida - Athyrididae
Composita sp., Cleiothyridina sp.
Composita sp. Brown 1849
Cleiothyridina sp. Buckman 1906
 Rhynchonellida - Trigonirhynchiidae
? Rhynchotreta sp.
? Rhynchotreta sp. Hall 1879
originally entered as "? Rhynchotreta sp."
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839
Ostracoda
 Podocopida - Bairdiidae
Bairdia sp.
Bairdia sp. M'Coy 1844 ostracod
originally entered as "Biardia sp."