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Gypsum. Lower Carboniferous. Hillsborough, New Brunswick. Collector: C.J. Osman. New Brunswick Museum (NBME 1087). Image width 19 cm. During the Carboniferous, the Windsor Sea flooded the low-lying areas of the Maritimes Basin in western New Brunswick. As sea levels changed in the Carboniferous period, the salt water evaporated, concentrating the minerals into potash, salt and gypsum.
