Periglacial weathering and headwall erosion in cirque glacier bergschrunds Sanders, J. W. ; Cuffey, K. M. ; Moore, J. R. ; MacGregor, K. R. ; Kavanaugh, J. L. Abstract Publication: Geology Pub Date: September 2012 DOI: 10.1130/G33330.1 Bibcode: 2012Geo....40..779S