Boulder OA1 seen from the N on July 2nd, July 18th, August 5th and August 16th, 2017. It was encountered first forming a glacier table, then it fell off towards the E, a small crevasse opened under the boulder, then a new ice pedestal began to form. Total lateral displacement was only 1.5 metres towards the east (relative to the ice; photos Lea Schwendener).