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Plagioclase Quarry (Sunstone quarry), Midtre Havredal, Havredal (Hafredal), Bamble (Bamle), Telemark, Norway

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 59° 0' 42'' North , 9° 31' 56'' East (est.)
Margin of Error:~0km
Other regions containing this locality:Scandinavia
Köppen climate type:Dfb : Warm-summer humid continental climate
Name(s) in local language(s):Feltspatt brudd (Solsteins bruddet), Midtre Havredal, Havredal (Hafredal), Bamble kommune, Telemark fylke, Norge


A feldspar quarry in an irregular sunstone (oligoclase)-bearing pegmatite dike about 200 m long and 60 m wide SE of the Midtre Havredal Farm, close to the hill Fløyås. Oligoclase was here mined for glass-production. The quarry follows the pegmatite for about 60 meters.


Mineral List


5 valid minerals.

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References

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Andersen, O. (1931): Feltspat II. Forekomster i fylkene Buskerud og Telemark, i flere herreder i Aust-Agder ogi Hidra i Vest-Agder. Norges Geologiske Undersøkelse 128b, p. 15-16.
Copley, P.A. & Gay, P. (1978): A scanning electron microscope investigation of some Norwegian aventurine feldspars. Norsk Geologisk Tidsskrift. 58, 93-95[samples from Havredal used in this study]
Copley, P. A. & Gay, P. (1979): Crystallographic studies of some Norwegian aventurinised feldspars by optical, X-ray, and electron optical methods. Norsk Geologisk Tidsskrift, 59: 228-237 [samples from Havredal used in this study]
Larsen, A. O., Nordrum, F. S. & Austrheim, H. (1999): Turmaliner i Norge. Bergverksmuseets Skrift 15: 21-30 [with an analysis of dravite from this locality]

 
Mineral and/or Locality  
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