“When we got close to the rocks in the quarry, we could see their banding was typical of Lewisian gneiss,” says Paul. Lewisian gneiss is metamorphic rock, which means it was formed by being heated up ...
Although a significant portion of the Grenville province located in North America has been precisely dated, the Chicoutimi Gneiss Belt within the St. Fulgence region of Quebec is one region in which ...