Carnarvon Member, Mount Head Fm, Alberta (Carboniferous of Canada)

Where: Alberta, Canada (50.4° N, 114.6° W: paleocoordinates 5.1° N, 40.5° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Carnarvon Member (Mount Head Formation), Meramecian (345.0 - 336.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, fine-grained, medium, coarse, dolomitic, argillaceous limestone and lithified, calcareous shale

• From table IV: "Cryptocrystalline and finely crystalline limestone with medium- and coarsely crystalline limestone, calcareous shale, and dolomitic limestone"

•From text: "The Carnarvon member is divisible into three subequal parts. The lower part is composed of cryptocrystalline limestone with stylolitic or thin shale partings in the base, grading upward to finely and coarsely crystalline limstones. The latter are partly altered to medium-crystalline dolomite, and are lenticular. The middle part is mainly alternating thin beds of cryptocrystalline and finely crystalline, argillaceous limestones with local fossil lenses and calcaresous, fucoidal shales. The upper part includes three cyclical units of cryptocrystalline to finely crystalline limestone, partly silicfied to chert in the middle of the beds, alternating with argillaceous, sparsely arenaceous, finely to medium-crystalline dolomitic limestones. The middle and upper parts of the member are fairly consistent throughout the area, but the lower part grades northward into thinly bedded alternations of shale and limestone or dolomitic limestone"

Primary reference: R. J. W. Douglas and P. Harker. 1958. Mississippian succession in Mount Head area, Alberta. Jurassic and Carboniferous of Western Canada 177-189 [N. Heim/N. Heim]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 62327: authorized by Noel Heim, entered by Noel Heim on 18.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Scyphozoa
 Conulariida - Conulariidae
Conularia sp. jellyfish
Anthozoa
 Stauriida - Ekvasophyllidae
Ekvasophyllum sp. Parks 1951 horn coral
Faberophyllum leathamense Parks 1951 horn coral
 Stauriida - Aulophyllidae
"Dibunophyllum" sp. Thomson and Nicholson 1876 horn coral
 Stauriida - Cyathopsidae
Caninia sp. Michelin 1840 horn coral
 Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826 tabulate coral
Strophomenata
 Productida - Productidae
 Productida - Productellidae
 Productida - Linoproductidae
 Productida - Monticuliferidae
Rhynchonellata
 Rhynchonellida - Camarotoechiidae
 Spiriferida - Spiriferidae
 Athyridida - Retziidae
 Athyridida - Athyrididae
Composita sp. Brown 1849
Composita trinuclea Hall 1856
[entered as Composita trinucleata]
 Terebratulida - Cranaenidae