141 - Dulankara section (Ordovician of Kazakhstan)

Also known as Nitikin Locality 141

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

• coordinate estimated from map

• outcrop-level geographic resolution

When: Dicellograptus pumilis graptolite zone, Akkol Member (Dulankara Formation), Katian (453.0 - 445.2 Ma)

• Dulankara Stage. Popov & Cocks (2006: txt. f. 3) suggests that this is the Degeres member, but they say Akkol in text.

•

•The uppermost Akkol Member, the age is constrained by the graptolites of the Dicellograptus pumilis Biozone listed above, which is the local equivalent of the Pleurograptus linearis and Dicellograptus complanatus biozones

• bed-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, I.F. Nikitin, and E.V. Sokiran. 1999. The earliest atrypides and athyridides (Brachiopoda) from the Ordovician of Kazakhstan. Palaeontology 42(4):625-661 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161919: authorized by Pete Wagner, entered by Pete Wagner on 15.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Climacograptidae
"Climacograptus styloides" = Climacograptus styloideus
"Climacograptus styloides" = Climacograptus styloideus Lapworth 1873 climacograptid
 Graptoloidea - Diplograptidae
Rectograptus sharenbergi, Orthograptus quadrimucronatus
Orthograptus quadrimucronatus Hall 1865 graptolite
Rhynchonellata
 Rhynchonellida - Sphenotretidae
Altaethyrella otarica
Altaethyrella otarica Rukavishnikova 1956
2:3:0
 Atrypida - Atrypinidae
Schachriomonia parva, Eospirigerina pennata
Schachriomonia parva Rukavishnikova 1956
7:0:0
Eospirigerina pennata Rukavishnikova 1956
4:1:0
Strophomenata
 Strophomenida - Hesperomenidae
Anoptambonites kovalevskii
Anoptambonites kovalevskii Popov et al. 2000
0:0:2