Abstract
In the Sredinnyi Range of Kamchatka, the Baraba Formation of continental conglomerates is assumed to be of the late Campanian age based on found flora remains, but data of isotopic geochronology suggest the Eocene age of these deposits. New data on radiolarians from cherty pebbles are considered in this work along with results of fission-track dating of zircons from pebbles and matrix of the Baraba conglomerates. Fission-track dates obtained for zircons from matrix approve the Eocene age of the Baraba Formation, and new dates characterizing pebbles are not contradicting this conclusion. The Baraba Formation structural position can hardly be lower, therefore, than that of the Irunei Formation.
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Original Russian Text © A.V. Solov’ev, T.N. Palechek, M.N. Shapiro, S.A. Johnston, J.I. Garver, D.M. Ol’shanetskii, 2007, published in Stratigrafiya. Geologicheskaya Korrelyatsiya, 2007, Vol. 15, No. 1, pp. 118–125.
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Solov’ev, A.V., Palechek, T.N., Shapiro, M.N. et al. New data on the Baraba Formation age (the Sredinnyi Range of Kamchatka). Stratigr. Geol. Correl. 15, 112–119 (2007). https://doi.org/10.1134/S0869593807010091
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DOI: https://doi.org/10.1134/S0869593807010091