Ellesmere Gr. Looking north from entrance to canyon upstream from station 63 K 83 to show local folding in Tertiary Eureka Sound beds directly beneath an eastward dipping thrust along which Permian Assistance beds (greyish-green) and Pennsylvanian Canyon Fiord beds (reddish) were thrust over the Eureka Sound. The thrust fault is just above the white knoll at the skyline and can be followed from there to the right at the base of the distinctively red beds below the dark area.