Drūkšiai-6 borehole, Jakšiai Fm. (Ordovician of Belarus)

Also known as Kazimirovo

Where: Belarus (55.6° N, 26.6° E: paleocoordinates 34.4° S, 1.2° E)

• coordinate based on nearby landmark

When: Dicranograptus clingani graptolite zone, Jakšiai Formation, Rakvere (451.8 - 450.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: pyritic, gray limestone and massive, green, calcareous marl

• "The formation consists of limestone and marl interbeds. The limestone is gray, pyritised, sometimes clayey, and massive. The thickness of marl intercalations is 2–4 cm. The marl is green, clayey, and massive; in some interlayers it contains

•abundant fauna of brachiopods and other fauna groups (biomorphic marl). The thickness of intercalations is 1–4 cm; the maximum thickness is 21 cm."

Size classes: macrofossils, mesofossils

Primary reference: J. Paškevičius. 2016. Pecularities of the lithology and fauna of the early Katian (Ordovician) in the Lithuanian facies zone. Geologija. Geografija 2(2):49-61 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192885: authorized by Björn Kröger, entered by Björn Kröger on 24.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Archaeorthidae
Cyrtonotella sp.
Cyrtonotella sp. Schuchert and Cooper 1931
 Orthida - Platystrophiidae
"Neoplatystrophia ovalis" = Neoplatystrophia ovalis, "Platystrophia ovalis" = Neoplatystrophia ovalis, Platystrophia saxbyensis
"Neoplatystrophia ovalis" = Neoplatystrophia ovalis Alikhova 1951
"Platystrophia ovalis" = Neoplatystrophia ovalis Alikhova 1951
Platystrophia saxbyensis Oraspold 1959
 Orthida - Dalmanellidae
Howellites wesenbergensis
 Orthida - Draboviidae
Pionodema cf. dubia
Strophomenata
 Strophomenida - Rafinesquinidae
Leptaena wesenbergensis, Rakverina subaeqiclina, "Rakverina inaeqiclina" = Rakverina inaequiclina
"Rakverina inaeqiclina" = Rakverina inaequiclina Alichova 1951
Trilobita
 Phacopida - Pterygometopidae
Chasmops sp., Chasmops wesenbergensis, Chasmops cf. wesenbergensis
Chasmops sp. M'Coy 1849 trilobite
Chasmops wesenbergensis Schmidt 1881 trilobite
Chasmops cf. wesenbergensis Schmidt 1881 trilobite