Putilovo Quarry, Bed 31 (Ordovician of Russian Federation)

Where: St. Petersburg, Russian Federation (59.9° N, 31.4° E: paleocoordinates 35.9° S, 1.3° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Asaphus expansus trilobite zone, Nikolskoe Member (Sillaoru Formation), Kunda (468.1 - 463.5 Ma)

Environment/lithology: marine; calcareous claystone and ooidal, gray, green, argillaceous limestone

• "Here the Sillaoru Formation is about 70 cm thick. It consists of calcareous clay with highly argillaceous limestone with numerous iron ooliths. The carbonates are heavily bioturbated, penetrated often by Skolithos burrows together with Trypanites type borings. The Nikolskoe Member, which starts with a purple phosphatized hardground surface, the iron ooliths are minute and the limestone, more greenish grey. It is about 55 cm thick", in Rasmussen & Harper (2008)

Size classes: macrofossils, mesofossils

Primary reference: C. M. O. Rasmussen and D. A. T. Harper. 2008. Resolving early Mid-Ordovician (Kundan) bioevents in the East Baltic based on brachiopods. Geobios 41:533-542 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191336: authorized by Björn Kröger, entered by Björn Kröger on 23.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

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Strophomenata
 Billingsellida - Polytoechiidae
Antigonambonites planus
 Billingsellida - Gonambonitidae
Gonambonites sp.
Gonambonites sp. Pander 1830
 Billingsellida - Clitambonitidae
Hemipronites imbricata
Rhynchonellata
 Pentamerida -
Syntrophiidina indet.
Syntrophiidina indet. Ulrich and Cooper 1936
 Orthida - Orthidae
Orthis callactis
Orthis callactis Dalman 1827