The cinder cone of the Karmelenberg is part of a volcanic group with ten eruption centres that was active about 350,000 to 300,000 years ago. In addition to the Karrmelenberg main top, there are also the Schweinskopf and the so-called Oberholzgruppe, of which no trace is visible any longer. The Schweinskopf is almost completely levelled due to quarrying.