Bestamakian Suite, Chagan River, eastern Kazakhstan (Ordovician to of Kazakhstan)

Where: Kazakhstan (49.0° N, 79.0° E: paleocoordinates 11.2° S, 73.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bestamak Formation, Llandeilo to Llandeilo (466.0 - 449.5 Ma)

• PJW: Originally given as Bestamakian Suite

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

• Here there is a body of light carbonate rocks up to 250 m thick occurring with marked nonconformity on Cambrian granodiorites. The upper part of this body contains a unit (10-12 m) of dark laminated limestones, from which the fossils listed above were extracted (1.5-2.0 m from their top)

Size classes: macrofossils, mesofossils, microfossils

Preservation: original silica

Collection methods: bulk, chemical

Primary reference: B.B. Nazarov and L.Y.e. Popov. 1976. Radiolarians, ecardine brachiopods and organisms of uncertain systematic position from the Middle Ordovician of eastern Kazakhstan. Paleontological Journal 10(4):33-42 [S. Holland/S. Holland/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37829: authorized by Steven Holland, entered by Steven Holland on 25.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Entactinaria - Entactiniidae
"Entactinia dasysa" = Stigmosphaerostylus radiolarian
n. sp.
Entactinosphaera verrucula radiolarian
n. sp.
 Acrotretida - Ephippelasmatidae
Veliseptum fragile Popov 1976
n. gen, n. sp.
 Acrotretida - Acrotretidae
"Aktassia triangularis" = Brachaktassia triangularis
"Aktassia triangularis" = Brachaktassia triangularis Popov 1976
n. gen, n.sp.
 Lingulida - Obolidae
Rowellella lamellosa Popov 1976
n. sp.
Konyrium varium Nazarov and Popov 1976 glass sponge
n. gen, n. sp.