14 October 2011
North of Fort Frances, Ontario, October 7, 2011. Centimeter-demarcated pencil for scale.
The granitoid vein intrudes metasedimentary rocks of the Archean-aged Quetico Group, exposed on the Superior Craton. Note the thickened hinges, the boudinage of the lower right long limb, and incipient boudinage of the upper left long limb.