ammonites
Mud mound at Putilovo Quarry, section 17, sample 8, Volkhov Stage (Ordovician of Russian Federation)

Also known as Reef 2580

Where: Russian Federation (59.9° N, 31.4° E: paleocoordinates 39.1° S, 0.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Zheltjaki Member (Volkhov Stage Formation), Dapingian (471.8 - 468.1 Ma)

• Paroistodus originalis conodont zone [JA: reassigned to the Dapingian because the triangularis zone is mid-Dapingian]

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified claystone

• microbial mud mound
• the upper of two thick clay lenses; the clay contains abundant carbonate noduls and fossil fragments

Size classes: macrofossils, microfossils

Primary reference: T. Tolmacheva, P. Fedorov, and E. Egerquist. 2003. Conodonts and brachiopods from the Volkhov Stage (Lower Ordovician) microbial mud mound at Putilovo Quarry, north-western Russia. Bulletin of the Geological Society of Denmark 50(1):63-74 [W. Kiessling/U. Merkel] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61802: authorized by Wolfgang Kiessling, entered by Uta Merkel on 03.07.2006