Four hundred million year old grey limestone sits on top of 1.2 billion year old red granite. The limestone extends to the Gulf of Mexico and to the Rocky Mountains. The granite goes to the Arctic and Atlantic. There is 800 million years of missing geological history, it was a period of errosion. The granite is part of the Frontenac Arch, which is a band that cuts across the St.Lawrence River here. Looking north. - Kingston Havaalanı fotoğraf galerisi

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	Orijinal resim (yeni pencere) görüntüle Steve Manders, 14 June 2013