The first ice we saw in our tour was Mendenhall glacier, but we quickly left it behind as we flew over the southwest corner of the Juneau ice field. The ice field is huge -- 1500 square miles. Mendenhall is just the perhaps most well-known glacier, but there are many others in the icefields. In this exposure you can see the medial moraine of two ice flows. Unlike a river, the ice flows don't mix when they collide. Instead, the two medial moraines just run parallel the rest of the way along the flow.
(Click the image to view a larger version.)