Where: Russian Federation (55.8° N, 48.9° E: paleocoordinates 28.3° N, 42.8° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: Cheremushka Member (Isheevo Formation), Wordian (266.9 - 264.3 Ma)
• Urzhumian beds, numbered P05/71 - P05/100 from bottom to top; the upper half of the section is Collection no. 197589 (Nurgaliev et al. 2015)
Environment/lithology: marine; limestone and marl
•Packages P05/71 - P05/87 Interval 35.90-41.15m Thickness 5.25m
•Shales with subordinate interbeds of marls and limestones. Shales: brownish-red, pinkish-red, with lenticular lamination and stains of bright-red and green shales. Marls and limestones: greenish-grey, pinkish-grey, algal-microbial, riddled with voids of plant roots in situ; several thin intervals (0.1-0.2m) of shale-loamy breccias.
•[Cheremushka (argillaceous-carbonate) Member (lower part)]
•Packages P05/88 - P05/97 Interval 41.15-45.45m Thickness 4.30m
•Limestone and marl. Limestone: dark- and light-grey, muddy, compact, solid, algal-microbial, sometimes vary hard and finely wavy laminated, riddled with numerous voids of plant roots in situ. Marls: grey, greenish or pinkish, with interbeds of red shales and siltstone. Rocks contain ostracods, bivalves, fish scales, small amphibian bones and charophytes. Few thin intervals (0.1m) of shale-loamy breccias and fissures of desiccation.
•[Cheremushka (argillaceous-carbonate) Member (upper part)]
•Packages P05/98 - P05/100 Interval 45.45-47.00m Thickness 1.55m
•Limestone and shale. Limestone: dark- and light-grey, muddy, compact, solid, algal-microbial, sometimes very hard and finely wavy laminated, riddled with numerous voids of plant roots in situ. Shales: red, pinkish-red, with green spots of gleisation on the in situ traces of plant roots. Limestones and subjacent grey shales contain scattered remains of ostracods, small bivalves, remains of fishes, and charophytes." (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 197587: authorized by Alex Dunhill, entered by Bethany Allen on 17.11.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
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| Stomochara | |
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| Luichara | |
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| Cuneatochara | |
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| Osteichthyes | |
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| Bivalvia | |
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Palaeomutela extensiva, Palaeomutela vjatkensis, Palaeomutela doratioformis, Palaeomutela wohrmani, Palaeomutela krotowi
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| Ostracoda | |
Prasuchonella nasalis, Paleodarwinula fragiliformis, Paleodarwinula elongata, Paleodarwinula teodorovichi, Paleodarwinula torensis, Paleodarwinula elegantella
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