Czy skamieniałości śladowe z fliszu karpackiego mają znaczenie stratygraficzne?
Abstract
HAVE TRACE FOSSILS FROM THE CARPATHIAN FLYSH A STRATIGRAPHIC VALUE?
Summary
Książkiewicz (9, 10) had presented stratigraphical ranges and suggested stratigraphical meaning of some of the selected trace fossils from flysch sediments of the Polish Carpatbian Mts. The present author's investigation in the Polish Outer Carpathians in southern part of the Magura Nappe (Senonian - Oligocene) enlarged stratigraphical ranges of some of the trace fossils (tab.). The progressive increase of the new data concerning stratigraphical ranges shows very low stratigraphic significance of trace fossils. A complex analysis of ichnoassociations seems to provide more reliable data to distinguish ichnostratigraphical units. The present study shows differences clearly visible between Senonian – Paleocene and Eocene ichnoassociations of thin- and mediumbedded flysch deposits from the southern part of the Magura Nappe. The Senonian - Paleocene ichnoassociations dominated by Chondrites, Planolites and Phycosiphon are thought to be related to dysareobic conditions. The Eocene ichnoassociations dominated by graphoglyptids (Paleodictyon and others) and ichnogenera produced by irregular echinoids (Seolicia, Taphrhelminthopsis and others) represented probably the more oxic conditions.
Summary
Książkiewicz (9, 10) had presented stratigraphical ranges and suggested stratigraphical meaning of some of the selected trace fossils from flysch sediments of the Polish Carpatbian Mts. The present author's investigation in the Polish Outer Carpathians in southern part of the Magura Nappe (Senonian - Oligocene) enlarged stratigraphical ranges of some of the trace fossils (tab.). The progressive increase of the new data concerning stratigraphical ranges shows very low stratigraphic significance of trace fossils. A complex analysis of ichnoassociations seems to provide more reliable data to distinguish ichnostratigraphical units. The present study shows differences clearly visible between Senonian – Paleocene and Eocene ichnoassociations of thin- and mediumbedded flysch deposits from the southern part of the Magura Nappe. The Senonian - Paleocene ichnoassociations dominated by Chondrites, Planolites and Phycosiphon are thought to be related to dysareobic conditions. The Eocene ichnoassociations dominated by graphoglyptids (Paleodictyon and others) and ichnogenera produced by irregular echinoids (Seolicia, Taphrhelminthopsis and others) represented probably the more oxic conditions.