From a unspecified locality near Holmestrand, in a pyroxene-basalt (B1-sequence)in the lower part of the Vestfold lavaplateau.
Maghemite has been found as a supergene alteration of magnetite that occurs as 0,01-0,08mm small crystals in the basaltic rock (Everdingen 1960).
References:
- R.O.V.Everdingen (1960): Paleomagnetic analysis of permian extrusives in the Oslo region, Norway. Studies on the igneous rock complex of the Oslo region XVII. Skrifter utgitt av Det norske Videnskaps-Akademi i Oslo, I. Mat. Naturv. Klasse 1960 no.1
- Neumann, H. (1985): Norges Mineraler. Norges geologiske Undersøkelse Skrifter 68 (in norwegian)
Mineral List:2 entries listed. 2 valid minerals.
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