OUMNH Number: | 795 |
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Name and quarry location: | Swedish porphyry, from Älvdalen, Dalarna, Sweden |
Geological description: | Lamprophyre (minette group). Poikilocrysts of brown (?kaersutitic) amphibole up to 25mm enclosing subhedral crystals of pyroxene, feldspar and opaque mineral. Groundmass contains carbonate and possible feldspathoid. |
Comments: | |
References: | Geonord (n.d.); Porfyr Museet (n.d.); Price (2007) 205 |
Further information: |
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Corsi's classification: | Class 15. Porphyry; Species 1; ii. Italian porphyries |
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Corsi's text: | 196.7 Porfido di Svezia |