Since we wanted accurate GPS positions for each of our stakes, we left the GPS running for 20 minutes at each location. We had three GPSes: one for the base station and two rovers. This meant that we would drive to a site, set up a GPS, then drive to the next site, set up a second GPS, then wait 20 minutes, then pick up both rovers and drive to the next pair. During these 20 minute waits, we would sometimes nap and other times explore the area. On one of these explorations, we walked over close to the edge of the glacier. This is what we found. The following season, from this same spot we could see a little lake with unfrozen water in it at the margin of the glacier to the right of this picture.