Complex sentence: The Kalkberg Formation is a fine grained, chert bearing, argillaceous limestone interbedded with calcareous shale that lies on top of two other units of the Helderberg Group, the Coeymans Formation and the Manlius Formation.
Split into simpler sentences: The Kalkberg Formation is a fine grained, chert bearing, argillaceous limestone interbedded with calcareous shale. This limestone unit that lies on top of two other units of the Helderberg Group, the Coeymans Formation and the Manlius Formation.