A small syenite pegmatite dyke on the eastern side of Vesle Arøya. TL for both cappelenite-(Y) and grenmarite. Most of the dyke was blasted away during the 1880s, only small remnants can be seen today.
References:
- Brögger, W. C. (1884): Forelöbig meddelelse om to nye norske mineraler, Låvenit og Cappelenit. Geologiska Föreningens i Stockholm Förhandlingar, 7, 598-600
- Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. p 462-467
- Bellezza, M., Franzini, F., Larsen, A. O., Merlino, S., Perchiazzi, N. (2004): Grenmarite, a new member of the götzenite-seidozerite-rosenbuschite group from Langesundsfjord district: definition and crystal structure. European Journal of Mineralogy, 16, 971-978.
Mineral List:28 entries listed. 22 valid minerals. 2 type localities (valid minerals).
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