Limestones of Zone 5 of Tokrau Stage stratotype (Devonian of Kazakhstan)

Where: Kazakhstan (46.8° N, 75.0° E: paleocoordinates 2.5° S, 68.6° E)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Monograptus kazachstanensis graptolite zone, Lochkovian (419.2 - 410.8 Ma)

• Monograptus kazachstanensis (M. uniformis s.l.)

Environment/lithology: marine; calcareous sandstone

• "...Lower Devonian deposits of the Ainasu Stage composed of fine-grained sandstones and siltstones which give way (in ascending order) to calcareous sandstones and limestones. The sandstones and siltstones carry [graptolites]. The calcareous sandstones have yielded brachiopods ...and crinoidea."

Size class: macrofossils

Primary reference: S. M. Bandaletov and N. L. Bublitchenko. 1977. Kazakhstan. in A. Martinsson, ed. The Silurian-Devonian boundary (IUGS, Series A, Number 5). Schweizerbart'sche, Stuttgart. 219-226 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13975: authorized by Michael Foote, entered by Michael Foote on 06.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Crinoidea
 Monobathrida - Scyphocrinitidae
Scyphocrinites ex gr. elegans
Strophomenata
 Strophomenida - Strophonellidae
Strophonella podolica
Rhynchonellata
 Spiriferida - Delthyrididae
Howellella ohionensis
 Spiriferida - Cyrtiidae
Eospirifer togatus
 Orthida - Dalmanellidae
Resserella elegantuloides