Distribution of the Callovian and Lower Oxfordian ammonite faunas in Poland

Abstract

Ammonite-familial spectra are determined for the Callovian and Lower Oxfordian of Poland in terms of relative abundance of specimens assigned to and specific diversity of particular families. The former mode of analysis appears as a more reliable paleobiogeographic tool than the latter. The recognized ammonite spectra suggest that in the Lower to Middle Callovian the entire area of Poland made part of the Submediterranean Province. In the Upper Callovian through Lower Oxfordian, southern and Central Poland remained within the Sub-mediterranean Province, while northern Poland was considerably influenced by the Subboreal fauna.