Abstract
The Tuffaceous Chalk of South Limburg (The Netherlands), a friable, porous,
bioclastic carbonate sandstone, became subject of scientific interest in 1770, when
workers found a large skull of Mososourus comperi in the subterranean quarry of
Mount St. Pieter near Maastricht. After Dumont (1849) had considered the Tuffaceous
Chalk of Maastricht to represent the youngest
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