This locality belongs to a small number of thorianite deposits called by Behier (1960) the "Groupe d'Ambonaivo" situated in the southeastern part of Madagascar
References:
Behier, J. (1960): Contribution á la Minéralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p.71
Mineral List:1 entry listed. 1 valid mineral.
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