RT Journal Article ID 24067cd311fb9495 A1 Shumenko, S. I. T1 To the study of Early Mesozoic, Palaeozoic, and Precambrian nannofossils JF International Journal on Algae JO IJA YR 2001 FD 2001-09-01 VO 3 IS 3 SP 90 OP 94 AB Samples of carbonate rocks from Triassic deposits of Siberia and the Northern Caucasus, Carbon and Devonian deposits from the East European platform, and Proterozoic (Precambrian) deposits from Karelia have been studied by means of electron microscopy. Evident coccolites were retrieved from the Triassic deposits, whereas the structures very similar to those of re-crystallized Cenozoic limestones containing nannofossils have been discovered in Palaeozoic and Proterozoic deposits. PB Begell House LK https://www.dl.begellhouse.com/journals/7dd4467e7de5b7ef,3e8ecba5665273fa,24067cd311fb9495.html