Stratigraphy and Geological Correlation

, Volume 19, Issue 1, pp 87-101

First online:

Silicoflagellates of the middle-early Late Eocene of the Kronotskii Bay (Eastern Kamchatka)

  • I. B. TsoyAffiliated withV.I. Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences Email author 

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The most complete characterization of Dictyochophyceae (silicoflagellate) assemblages from sediments of the Kronotskii Bay, Eastern Kamchatka, which are typical of the Corbisema hexacantha (Middle Eocene) and Naviculopsis foliacea (terminal middle-initial Late Eocene) zones in the tropical/subtropical zonation by Bukry (1981), is considered for the first time. In total, 43 silicoflagellate species of 8 genera are identified. The prevalence of species of the genera Corbisema and Dictyocha in the assemblages suggest warm, close to subtropical conditions in a sea basin that existed in the Eastern Kamchatka region during the Middle-Late Eocene.


Dictyochophyceae silicoflagellates diatoms Middle Eocene Late Eocene Kronotskii Bay Easterm Kamchatka Northwest Pacific