Limestones of Zone 4 of Tokrau Stage stratotype (Silurian of Kazakhstan)

Where: Kazakhstan (46.8° N, 75.0° E: paleocoordinates 5.6° S, 68.8° E)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Pseudomonoclimacis bandaletovi zone, Pridoli (423.0 - 419.2 Ma)

Environment/lithology: marine; limestone

• "(4) Sandstones interbedded with siltstones and rare tuffites. The lower part contains limestone lenses up to 50 m thick. Sandstones and siltstones contain graptolites...limestones--corals...brachiopods...trilobites"

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 13973: 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
unclassified
  -
Stegorhynchus cf. nuculus
Anthozoa
 Heliolitida - Heliolitidae
Heliolites interstinctus
 Favositida - Favositidae
Squameofavosites gurievskiensis, Favosites cf. pactum
Favosites cf. pactum tabulate coral
 Favositida - Alveolitidae
Axuolites borissiakae
Axuolites borissiakae tabulate coral
Strophomenata
 Strophomenida - Amphistrophiidae
Mesodouvillina cf. costata
Rhynchonellata
 Orthida - Hesperorthidae
"? Schizoramma rigida" = Schizonema
"? Schizoramma rigida" = Schizonema
 Spiriferida - Xenomartiniidae
Quadrithyris cf. jakovlevi
 Atrypida - Atrypidae
Atrypa aff. tajnensis
Trilobita
 Corynexochida - Illaenidae
Bumastus cf. barriensis
Bumastus cf. barriensis Murchison 1839 trilobite