Corporation (Forsyth's) quarry, Mont Royal, Montréal, Québec, Canada
© Charles Creekmur
Gray band of arsenic. Douglas Merson photo and collection.
© 2023 Douglas Merson
Quarried face in Corporation quarry showing contact between Cretaceous-age nepheline syenite (dark gray, left) and altered Ordovician-age Trenton limestone (light gray, right). A prominent vertical dyke is visible at the left margin. Photo scanned from Adams (1914).