Formation Description
The Kalkberg formation is a Geddinan aged medium grained cherty limestone
interbedded with calcareous and argillaceous shales. Chert nodules
are common near the bottom of the formation, and distinguish it from the
underlying Coeymans Formation. The limestone has thin to medium beds,
often with irregular bedding planes, possibly due to bioturbation (Bordeaux).
The Kalkberg was deposited in the Lower Devonian during a marine transgression
and is thought to represent a middle shelf environment (LaPorte).
It overlies the Coeymans and is under the New Scotland. The Kalkberg’s
environment was equivalent to that of the Alsen Formation.
The most abundant organisms found in the Kalkberg are brachiopods and
bryozoans, but crinoids, rugose corals, and trilobites are also common
(Bordeaux). While the Kalkberg is quite fossiliferous, the rock is
very hard, making it difficult to extract fossils. A few that we
managed to hack out of the rock are shown below.
