Lower-middle Eocene formations of the Crimea: Facial peculiarities and forming conditions.

Autor: Lygina, E., Kopaevich, L., Nikishin, A., Shalimov, I., Yakovishina, E.
Zdroj: Moscow University Geology Bulletin; Dec2010, Vol. 65 Issue 6, p343-354, 12p
Abstrakt: This work considers the structure and conditions of the formation of deposits of the Simferopolskoe regional stage of the Crimea. The deposits of this stage include planktonic foraminifera zones Morozovella aragonensis and Acarinina bullbrooki and nanoplaktonic zones Marthasterites tribrachiatus (the upper part), Discoaster lodoensis, Discoaster sublodoensis (lower part). The deposits of this interval throughout most of the Crimea represent a nummulitic bank, which formed in shallow warm-water basin and was isolated carbonate platform. The distribution of rocks of this regional stage, the facial change, and a number of interruptions are shown in the chronostratigraphic profile. The facial transitions within the carbonate platform point to variations in the basin's depth, as well as periodical changes in the relative sea level, which were not only of a eustatic nature, but were determined by the periodic rise of the Simferopol Uplift. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index