Allan Mountain lower member, Allan Mountain Limestone (Carboniferous of the United States)

Where: Montana (47.4° N, 105.6° W: paleocoordinates 11.0° S, 41.3° W)

• coordinate based on political unit

• basin-level geographic resolution

When: lower Member (Alan Mountain Limestone Formation), Kinderhookian (358.9 - 352.0 Ma)

• "Madison Group (lower), lower mbr. (lowest 50 ft.) zones A & B"

• member-level stratigraphic resolution

Environment/lithology: marine; gray, argillaceous, calcareous limestone and shale

• "Ls beds 1-4 ft thick, gray-brown mudstone, separated by calcareous silty thin-bedded nodular argillaceous ls, some shale. 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 544: authorized by Jack Sepkoski, entered by Mike Sommers on 12.01.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "M.R. Mudge, W.J. Sando, J.T. Dutro Jr. 1962. Miss. rocks of Sun River Canyon area, Sawtooth Range, Montana. AAPG Bull. 46:2003-2018"
Show authors, comments, and common names
unclassified
  -
Nautiloida indet., Ammonoida indet.
Nautiloida indet.
orthoconic cephalopod
Ammonoida indet.
ammonoid cephalopod
Anthozoa
 Stauriida - Antiphyllidae
Rotiphyllum sp.
Rotiphyllum sp. Hudson 1942 horn coral
 Stauriida - Laccophyllidae
"Permia sp." = Trochophyllum (Permia)
"Permia sp." = Trochophyllum (Permia) Stuckenberg 1895 horn coral
 Stauriida - Metriophyllidae
Metriophyllum sp.
Metriophyllum sp. Milne-Edwards and Haime 1850 horn coral
 Stauriida - Cyathaxoniidae
Cyathaxonia sp.
Cyathaxonia sp. Michelin 1847 horn coral
 Stauriida - Amplexidae
Amplexus sp.
Amplexus sp. Sowerby 1814 horn coral
 Auloporida - Auloporidae
Aulopora sp.
Aulopora sp. Goldfuss 1829 tabulate coral
Trilobita
 Proetida -
? Proetida indet.
? Proetida indet. Fortey and Owens 1975 trilobite
trilobite, indet. - originally entered as "? Proetida indet."
Lingulata
 Lingulida - Discinidae
Orbiculoidea sp.
Orbiculoidea sp. d'Orbigny 1847
Strophomenata
 Productida - Productellidae
Avonia sp., Productus sp., Orbinaria sp.
Orbinaria sp. Muir-Wood and Cooper 1960
 Orthotetida - Schuchertellidae
? Schuchertella sp.
? Schuchertella sp. Girty 1904
originally entered as "? Schuchertella sp."
 Strophomenida - Chonetidae
Chonetes sp.
Chonetes sp. Fischer de Waldheim 1830
Rhynchonellata
 Athyridida - Athyrididae
Composita sp.
Composita sp. Brown 1849
 Rhynchonellida - Rhynchonellidae
Rhynchonellidae indet.
Rhynchonellidae indet. Gray 1848
rhynchonellid brachiopod - originally entered as "Rhynchonellida indet."
 Spiriferinida - Syringothyrididae
Syringothyris sp.
 Spiriferinida - Punctospiriferidae
Punctospirifer sp.
Punctospirifer sp. North 1920
 Orthida - Rhipidomellidae
? Rhipidomella sp.
? Rhipidomella sp.
originally entered as "? Rhipidomella sp."
 Orthida - Schizophoriidae
? Schizophoria sp.
? Schizophoria sp. King 1850
originally entered as "? Schizophoria sp."
 Spiriferida -
Spiriferida indet.
Spiriferida indet. Waagen 1883
ambocoelid brachiopod
 Spiriferida - Elythidae
? Torynifer sp.
? Torynifer sp.
originally entered as "? Torynifer sp."
 Spiriferida - Ambocoeliidae
? Crurithyris sp.
? Crurithyris sp. George 1931
originally entered as "? Crurithyris sp."
 Spiriferida - Spiriferidae
Spirifer sp.
Spirifer sp. Sowerby 1818
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
crinoid columnals