Northward view of the Tasman Glacier showing rock debris spilt down the Hochstetter Glacier (entering lower left) from the 1991 rock avalanche from the east side of the high peak of Mt Cook. The avalanche was estimated to total 10 million cubic metres and reduced the height of the mountain by 10 metres. Upper-left picture, the Rudolf Glacier enters the Tasman.

Northward view of the Tasman Glacier showing rock debris spilt down the Hochstetter Glacier (entering lower left) from the 1991 rock avalanche from the east side of the high peak of Mt Cook. The avalanche was estimated to total 10 million cubic metres and reduced the height of the mountain by 10 metres. Upper-left picture, the Rudolf Glacier enters the Tasman.