MacDougalls Island (formerly Basaltic Island) is a tidal island in the Saint George Parish of Charlotte County, New Brunswick, Canada in the Bay of Fundy. Remainder of parish on mapbooks 490, 497, 500, and 501 at same site.
It is noted to have purple fluorite, as well as pyrite, sphalerite, galena, malachite and chalcopyrite.
In September 1997, the island was used for dye dispersion trials in Passamaquoddy Bay, seeking to trace the route of sea louse pesticides.
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