Sentyak Borehole, Kama River (Permian of Russian Federation)

Where: Russian Federation (55.7° N, 51.7° E: paleocoordinates 28.4° N, 44.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lingula Shale Member (Baitugan Formation), Roadian (272.3 - 268.8 Ma)

• Beds numbered 1-3 from bottom to top; bed 1 is Ufimian, while beds 2 and 3 (which contain most of the fossils) are Lower Kazanian, of the Baitugan Formation (Nurgaliev et al. 2015)

•Overlain by the beds of outcrop S7 (Collection no. 197600)

Environment/lithology: marine; shale

• "[Ufimian Stage - Sheshmian Formation (Horizon)]

•Package 1 Interval 0.0 - 10.0m Thickness 10.0m

•Reddish-brown, calcareous, irregularly bedded siltstones and shales with interbeds of yellowish-brown polymict sandstones.

•[Lower Kazanian Substage - Baitugan Beds - Lingula Shales Member]

•Package 2 Interval 10.0m - 10.5m Thickness 0.5m

•Thin alternation of grey and red shales.

•Package 3 Interval 10.5 - 21.0m Thickness 10.5m

•Bluish-grey, thinly bedded, plat shales with numerous remains of the inarticulate brachiopod Lingula orientalis, and ostracods. The rock contains bivalves and fish scales." (Nurgaliev et al. 2015)

Size class: macrofossils

Primary reference: D. K. Nurgaliev, V. V. Silantiev, and S. V. Nikolaeva. 2015. Type and reference sections of the Middle and Upper Permian of the Volga and Kama River Regions: A Field Guidebook of XVIII International Congress on Carboniferous and Permian. 1-208 [A. Dunhill/B. Allen/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 197599: authorized by Alex Dunhill, entered by Bethany Allen on 17.11.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Protohaploxypinus
  -
Ostracoda
 Podocopida - Healdiidae
 Platycopida - Cavellinidae
Cavellina sp. Coryell 1928 ostracod
Lingulata
 Lingulida - Lingulidae
Bivalvia
 Trigoniida - Schizodidae
Schizodus rossicus de Verneuil 1845 clam
 Ostreida - Pterineidae