Calciocarbonatite dikes (Firesand River Carbonatite Complex, Mesoproterozoic, 1.078 Ga; Wawa Lake East roadcut, northeast of Wawa, Ontario, Canada) 19 Image by James St. John Calciocarbonatite in the Precambrian of Ontario, Canada. Carbonatites are rare igneous rocks - they are composed of carbonate minerals, typically calcite (CaCO3 - calcium carbonate). Carbonatites are … [Read more...] about Calciocarbonatite dikes (Firesand River Carbonatite Complex, Mesoproterozoic, 1.078 Ga; Wawa Lake East roadcut, northeast of Wawa, Ontario, Canada) 19
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