Abstract
Core Sm-l Smita (near Ploužnice, 81 m depth) shows a complete succession of lacustrine deposits of the Ploužnice Level. This study is focused on many relatively thin (cm thick) carbonate beds which occur within mudstone, claystone and sandstone dominated lacustrine succession.
Most carbonates are concentrated in the lower (62-51 m) and upper (18-4 m) carbonate-rich intervals. Carbonates are composed mostly of dolomite and calcite, micrite and dolomicrite form matrix, sparite, dolosparite together with micrite or dolomicrite form ooids, peloids or bioclasts.
Various carbonates form fabrics of different cement types. Several stages of diagenetic processes are observed.
These include early silicification and calcite cementation, later recrystallization and dolomitization and the latest dedolomitization and calcite vein formation.