Where: Russian Federation (64.0° N, 147.2° E: paleocoordinates 16.0° N, 10.4° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Akidograptus ascensus graptolite zone, R Member (Maut Formation), Rhuddanian (443.4 - 440.8 Ma)
• Bed R73. Not clear if this is the very latest Hirnantian or the very earliest Rhuddanian. PJW: No, past-me, it is Rhuddanian.... ;-) Dapsilodus obliquicostatus - Distomodus kentuckyensis conodont zone. Was Chalmak, but now Maut, which overlies the Tirekhtyakh Formation and underlies the Sandagun Formation. "R member"
• bed-level stratigraphic resolution
Environment/lithology: limestone
Size classes: macrofossils, mesofossils
Primary reference: T. N. Koren and R. F. Sobolevskaya. 2008. The regional stratotype section and point for the base of the Hirnantian Stage (the uppermost Ordovician) at Mirny Creek, Omulev Mountains, Northeast Russia. Estonian Journal of Earth Sciences 57(1):1-10 [P. Wagner/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 152991: authorized by Pete Wagner, entered by Pete Wagner on 04.12.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Pterobranchia | |
Glyptograptus tamariscus Nicholson 1868 graptolite | |
Neodiplograptus modestus graptolite | |
Rhynchonellata | |
Zygospiraella sp. Nikiforova 1961 | |
| |
Skenidioides cf. scoliodus Temple 1968 | |
Trilobita | |
Acernaspis sp. Campbell 1967 trilobite |