Early Frasnian bioherms in the Holy Cross Mts

Abstract

The Frasnian bioherms exposed along the southern limb of the Gałęzice syneline in the Holy Cross Mts, Central Poland, occur in the highest part of the stromatoporoid-coral sequence, and their facies equivalent are chiefly the·coral biostromes·of the Upper Sitkówka Beds. In spite of small bathymetric differences between bioherms and biostromes, they contrast in ecology of the contained invertebrates, especially in brachiopod assemblages. The bioherms have developed in the belt on a gentle southern slope of the-early Frasnian shallow-water carbonate bank of the Kielce region in the central part of the Holy Cross Mts.