139 - Dulankara section (Ordovician of Kazakhstan)

Also known as Nitikin Locality 139

Where: Kazakhstan (44.7° N, 75.3° E: paleocoordinates 14.9° S, 74.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Climacograptus caudatus - Climacograptus morrisi graptolite zone, Degeres Member (Dulankara Formation), Katian (453.0 - 445.2 Ma)

• Late Caradoc age is defined by the underlying occurrence of the graptolite Pseudoclimacograptus scharenbergi in the uppermost part of the underlying Anderken Formation (Nikitin 1972; Popov et al. 1999; Text-fig. 2), which is characteristic of the Climacograptus caudatus Biozone, the local equivalent of the Climacograptus clingani Biozone.

• member-level stratigraphic resolution

Environment/lithology: coastal; lithified siltstone

• The calcareous algae in the Akkol Member and the occasional dasyclad algae in the Degeres Member suggest deposition within the photic zone, but in less turbulent environments than the Otar Member, although the selective orientation of the pelmatozoan stems and brachiopod shells suggest that the sediments were occasionally affected by strong storms or tidal currents.
• Key on Txt. Fig. 2

Size class: macrofossils

Preservation: coquina

Primary reference: L. E. Popov and L. R. M. Cocks. 2006. Late Ordovician brachiopods from the Dulankara formation of the Chu-ili range, Kazakhstan: their systematics, palaeoecology and palaeobiogeography. Palaeontology 49(2):247-283 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185962: authorized by Pete Wagner, entered by Pete Wagner on 31.05.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella akdombakensis Klenina 1984
0:0:1
Sowerbyella ampla Nikitin and Popov 1996
0:0:1
 Strophomenida - Glyptomenidae
Platymena tersa Popov and Cocks 2006
0:6:1
 Strophomenida - Christianiidae
Christiania proclivis Popov and Cocks 2006
0:1:3
 Strophomenida - Strophomenidae
"Strophomena orthonurensis" = Strophomena (Strophomena) orthonurensis
"Strophomena orthonurensis" = Strophomena (Strophomena) orthonurensis Misius 1986
0:13:9