Québec City sits between the Laurentian highlands of the southeastern Grenville Province of the Canadian Shield and the Appalachian Mountains that were formed during the Taconic and Acadian orogenies. Bedrock here is the Upper Ordovician Utica shale that “overlies the predominantly shallow marine carbonate facies of the Cambrian-Ordovician St. Lawrence Platform” (or St. Lawrence lowlands).The [...]
