(Dreiser Maar (Dreiser Weiher), Brück-Dreis, Daun, Eifel, Rheinland-Pfalz, Deutschland)
A pond, representing the now flooded pipe of an ancient volcano (a so-called 'Maar')
Outcrops of basaltic lapilli tuffs with different types of xenolites - ultrabasic ones (dunite, lherzolithe, pyroxenite, hornblendite), micaschist, metasomatite and carbonatite - in a small abandoned sand pit north of the road leading from Dreis to Hillesheim.
Located 500 m west of Dreis-Brück and about 8 km north of Daun.
Refs.:
- Rammelsberg, C., (1870): Über den Olivinfels vom Dreiser Weiher, Annalen der Chemie und Physik, Vol. 217, 512-519
- Frechen, J., (1963): Kristallisation, Mineralbestand, Mineralchemismus und Förderfolge der Mafitite vom Dreiser Weiher in der Eifel, Neues Jahrbuch für Mineralogie, Monatshefte, 205-225
- Frechen, F., (1976): Siebengebirge am Rhein ... Maargebiet der Westeifel, Borntraeger (Berlin, Stuttgart)
- Meyer, W., (1986): Geologie der Eifel, Schweizerbart (Stuttgart)
- Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J.,(2006): Minerale der Eifelvulkane, CD, published by authors
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Map Reference: 50°15'59"N , 6°46'41"E
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