ammonites
Bol’shaya Kuonamka River 8/32 (Cambrian of Russian Federation)

Also known as Section 8

Where: Siberia, Russian Federation (70.7° N, 113.0° E: paleocoordinates 17.0° S, 6.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tomagnostus fissus / Paradoxides sacheri zone, 7 Member (Kuonamka Formation), Solvan (513.0 - 501.0 Ma)

• Amgan stage of Siberian scale. Tomagnostus fissus / Paradoxides sacheri zone; "correlated with lower Drumian Stage of IUGS"

• bed-level stratigraphic resolution

Environment/lithology: lime mudstone

• "The fossils are derived from limestone beds in the bituminous Kuonamka Formation; "Grey and brown bituminous lime mudstones with minor bituminous black shale and rare layers of black chert. Thick- ness: 11.8 m."

Size classes: macrofossils, microfossils

Preservation: replaced with silica

Collected by A. Kouchinsky, S. Bengtson in 1996

• Swedish Museum of Natural History

Primary reference: A. P. Gubanov, A.V. Kouchinsky, J.S. Peel and S. Bengston. 2004. Middle Cambrian molluscs of ‘Australian’ aspect from northern Siberia. Alcheringa 28(1):1-20 [P. Wagner/P. Wagner/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49431: authorized by Pete Wagner, entered by Pete Wagner on 15.04.2005, edited by Hallie Street