Small Foraminifers from the Middle and Upper Eocene in the Burgas District. Calcareous benthic foraminifers – Part I

Abstract

A series of papers is intended to be published in which the results from the analysis of the taxonomic composition and stratigraphic significance of the small foraminiferal assemblages in the Eocene sediments from the Burgas district will be presented. The collection studied includes microfossils from the Mugris Formation and the Ravnec Formation from 19 borehole sections on the territory of Černo More Coal Basin (North of Burgas). Most of the small benthic calcareous foraminifers (50 taxa) - from family Spiroloculiniclae Wiesner to family Cibicididae Cushman are described and illustrated in this study.