Where: Russian Federation (54.5° N, 52.2° E: paleocoordinates 27.6° N, 45.2° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Spiny Limestone Member (Baitugan Formation), Roadian (272.3 - 268.8 Ma)
• Ufimian / Lower Kazanian beds, numbered A2/7 and A2/8 from bottom to top (Nurgaliev et al. 2015)
•Underlain by the beds of outcrop A1 (the top of which is Collection no. 197624), and overlies the beds of outcrop A3 (Collection no. 197626)
Environment/lithology: marine; limestone and marl
•Package A2/7 Interval 20.5 - 21.5m Thickness 1.0m
•Limestone: yellowish-grey, bioclastic, coquina, medium-bedded, with numerous small foraminifers, ostracods, gastropods, brachiopods. In some places the rock is overwhelmed by brachiopod spines. The base of the bioclastic limestone bed has feeding burrows (10-15mm in diameter) branched in the horizontal plane and filled with shell debris.
•Package A2/8 Interval 21.5 - 33.2m Thickness 11.7m
•Alternation of yellowish-grey, medium-bedded marls, limestones and mudstones. Several bedding planes contain pavements of the brachiopod Cancrinella cancrini. The rock also contains ostracods, bivalves and other brachiopods. Some bedding planes contain only charred plant fragments with rare Lingula, as well as other ones that contain only subhorizontal trace fossils and plant debris." (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 197625: authorized by Alex Dunhill, entered by Bethany Allen on 18.11.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
| Bivalvia | |
|
| |
|
| |
|
| |
|
| |
| Rhynchonellata | |
|
| |
|
| |
| Strophomenata | |
|
| |
| Lingulata | |
|
| |