Palynological and Organic-Petrographic Data on Very Low- and Low-grade Metamorphic Rocks in the Slavonian Mountains (Northern Croatia)

Abstract

The palynological data suggest a Late Silurian to ?Early Carboniferous sedimentation age for the weakly metamorphosed rocks from the Mts. Psunj, Papuk and Krndija (Slavonija, North Croatia). Palynofacies and organo-petrographic data indicate that the protolithic sedimentary rocks were deposited in comparatively calm, anoxic to suboxic depositional environments. The vitrinite reflectance data for the same samples indicate the coal rank of meta-anthracite or anchimetamorphic zone grading into the coal rank of meta-anthracite/semigraphite or anchimetamorphic/epimetamorphic zone.