Thanks Rick! Northern Ontrio does indeed have volcanic rocks. In fact these rocks in the picture are on the boderline of a very large mafic vocanic rock structure or greanstone belt that extends from the Timmins Ontario area to Northern Quebec and that holds some of the largest gold mines in Canada such as Detour Gold north of Cochrane. I'm told however, that these are amphibolite rocks in the picture, a metamorphic rock usually derived from mafic volcanic rocks. Thanks for your comments!