Ground Moraine in Fischergraben
In Fischergraben, a few meters below
Bachmühle, a ground moraine is exposed,
directly overlaying the bedrock of the
Mitterberger Series (green-dark gray shale,
quartzites, etc., Age: approximately 280
million years). Ground moraine consists of
debris that is ground down at the base of
the glacier in contact with the underlying
bedrock. This results in deposits in which
very fine-grained sediments (clays) form
the matrix, and a wide range of particle
sizes, including stones and boulders, are
present.
Larger components often exhibit
scratch marks from transportation.
The deposits of the ground moraine are
heavily compacted due to the overburden
pressure of the ice mass and exhibit
high strength. Ground moraines serve as
aquifers.
The Buchberg Church is situated on a
ground moraine. In ground moraine
landscapes, water does not easily
percolate, often leading to the formation
of wet areas or small streams that
become water-bearing during periods of
precipitation.
English 
German 
