1863 ft, Jackfish River Section, Mackenzie Mountains (Carboniferous of Canada)

Where: Northwest Territories, Canada (61.1° N, 124.0° W: paleocoordinates 11.1° N, 36.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Besa River Formation, Osagean (352.0 - 343.0 Ma)

• This unit is 265 feet thick. The bed label is given as feet from the base of the section to the base of the unit containing this collection.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, gray, cherty/siliceous limestone and lithified, gray, calcareous shale

• "Limestone, medium to dark gray, and dark gray calcareous shales and mudstones, limestone beds from a few inches to 15 feet thick, gradational to shaly interbeds. Fossil fragments common. Black chert nodules present in the limestones."

Size classes: macrofossils, mesofossils

Preservation: cast

Primary reference: W. J. H. Patton. 1958. Mississippian succession in South Nahanni River area, Northwest Territories. Jurassic and Carboniferous of Western Canada 309-326 [N. Heim/N. Heim/N. Heim]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 62432: authorized by Noel Heim, entered by Noel Heim on 19.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Rhipidomellidae
Rhipidomella sp., Rhipidomella cf. diminutiva
 Spiriferida - Brachythyrididae
Brachythyris sp., Brachythyris chouteauensis
Brachythyris sp. M'Coy 1844
 Spiriferida - Spiriferellidae
Spiriferella sp., Spiriferella cf. minnewankensis
Spiriferella sp. Tschernyschew 1902
 Spiriferida - Spiriferidae
"Spirifer grimesi" = Mesochorispira grimesi, Spirifer centronatus
"Spirifer grimesi" = Mesochorispira grimesi Hall 1858
Spirifer centronatus Shimer 1926
S. centronatus minnewankensis
 Spiriferida - Spinocyrtiidae
Platyrachella cf. rutherfordi
 Spiriferida - Elythidae
Torynifer pseudolineata
 Athyridida - Athyrididae
Cleiothyridina lata, Cleiothyridina obmaxima
Cleiothyridina obmaxima McChesney 1861
Strophomenata
 Orthotetida - Pulsiidae
? Schellwienella sp.
 Productida - Productidae
Dictyoclostus sp., Dictyoclostus cf. jasperensis
Dictyoclostus sp. Muir-Wood 1930
Dictyoclostus sp. undet.
 Productida - Echinoconchidae
Pustula sp.
Pustula sp.
Pustula sp. undet.