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Dreis Maar (Dreis pond), Brück-Dreis, Daun, Eifel, Rhineland-Palatinate, Germany
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Picotite
Dreis Maar, Brück-Dreis, Daun, Eifel, Rhineland-Palatinate, Germany

Photo: C.H.M.-Schäfer
Latitude: 50°15'59"N
Longitude: 6°46'41"E
 
Name(s) in local language(s): Dreiser Maar (Dreiser Weiher), Brück-Dreis, Daun, Eifel, Rheinland-Pfalz, Deutschland
 
A pond, now artificially drained, representing the flooded pipe of an ancient volcano (a so-called 'Maar').
Outcrops of basaltic lapilli tuffs with different types of xenoliths - 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.

Mineral List

'Albite-Anorthite Series'
Augite
'Biotite'
Corundum
Diopside
Enstatite
Fluorapatite
Forsterite
Hercynite
var: Picotite

'Hornblende'
Magnetite
Meionite
Pargasite
Phlogopite
Pyrope
Rutile
Sanidine
Titanite


18 entries listed. 14 valid minerals.

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References

- 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
- Hörmann, P.K. (1966): Die Verteilung des Berylliums in den Mafititknollen des Dreiser Weihers (Eifel). Contributions to Mineralogy and Petrology 13, 374-388 (in German).
- Kenichiro Aoki and Ikuo Kushiro (1968): Some Clinopyroxenes from Ultramafic Inclusions in Dreiser Weiher, Eifel. Contributions to Mineralogy and Petrology 18, 326-337.
- 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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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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