Huge operating (1980-2007) limestone quarry (Lafarge Co.) within the city of Montréal in the old Montréal-Est district. The limestone is intruded by an enormous igneous dyke up to 5 m thick which is exposed for a length of over 1 km in the quarry. There are also alkaline sills probably related to the Monteregian alkaline province (Mont St-Hilaire etc.). The minerals occur mostly in tiny cavities in the sills.
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Map Reference: 45°37'14"N , 73°32'6"W
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