Composition and microstructure of stratiform stromatolites of Karuyarvinskoy suite in Sredny peninsula (northeastern framing of the Kola peninsula)

The structure, composition and microstructure of the stratiform stromatolites, detected on the Middle Peninsula in Кaruyarvinskoy Suite of the Kildin series (Riphean) are investigated for the first time. The lamination of the stromatolites is caused by alternation of dark (organic) and light (terrigenous) lamina. Clotted microfabric and black interwoven filaments, which were found within dark dolomite laminae, are interpreted as signs of microbial life traces.