Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Subfossil molluscs of a flat-bog deposit north of the Spišská Belá village (east of the High Tatra Mts.)
Abstract
An extensive flat-bog deposit containing fresh-water sediments (alm and tufa) occurs north of Spišská Belá and it has been exploited for many decades. The occurrence of molluscan shells in the deposit is limited only to four calcareous horizons. Besides the species common in shallow as well as in periodic streams and marshes also assemblages typical for open sloughs are present. This is a phenomenon characteristic for large-scale deposits containing similar type of sediments which are, moreover, situated far from an extensive forest cover. The flat-bog deposits on this locality have been classified by Jankovská (1972) to the end of the Subboreal and older part of the Subatlantic periods. This also documented with applies to ourmalacofaunas (MF) from the beginning and expansion of calcareous sediments, MF 4 to MF 2. The upper horizon with MF 1 was generated after the flat-bog growth had been terminated as a consequence of lowering of the ground-water level during the land-filling precess probably in the Subrecent period.
