On the Diatom Flora in Interglacial Kieselguhr at Hollerup in East Jutland

Abstract

In 38 samples of diatoms from the interglacial kieselguhr deposits at Hollerup in East Jutland, the presence of 355 different forms of diatoms was established, including 11 nov. spec., and 1 nov. var.

pH and halobion spectra show that sedimentation occurred in a nutritious fresh water area with pH abt. 7.0.

The proportion of Centrales to Pennales indicates that during depositing of the lowest layers, there have been considerable quantities of free water in the lake, which was afterwards filled up with a widely distributed reedswamp vegetation. This vegetation has served as a medium for the epiphytic diatoms found to be predominant in the samples from the upper layers of the deposit.