Because of Finsterwalder's efforts, �lgruben rock glacier became the subject of a notably extended, longitudinal study of flow velocity with high value in climate research, with repeat surveys undertaken by Wolfgang Pillewizer in 1938, 1939, and 1953 using photogrammetry, and which is still ongoing, employing modern satellite-based positioning techniques.
42.
The'cirque infills'described by H�tterstrand et al . ( 2008 ) in the Khibiny Mountains, Kola Peninsula could be described as discrete debris accumulations, although their origin is postulated by these authors as being moraine remnants of an ice sheet pushing into these cirques rather than as rock glaciers formed within the cirques.
