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- Vadret da Tschierva
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Overview from Alp Surovel, approx. 1km SSE of Fuorcla Surlej (July 2004). The morning sun emphasizes the massive lateral moraines. On the horizon from left to right: Piz Bernina, Piz Scerscen, Piz Roseg, Piz Sella and Dschimels.
The advance of Vadret da Tschierva during the Little Ice Age led to the damming on Vadret da Roseg. Today the true left lateral moraine of Vadret da Tschierva still dams the long glacial lake Lej da Vadret (photo July 2004).
Details of the tongue of Vadret da Tschierva in July 2004. Thrust planes bring basal debris to the glacier surface (dark transverse debris bands). On the inner wall of the lateral moraine a lot of stagnant ice becomes exposed.
Details of the true right lateral moraine; note the huge, polished bolder embedded in the moraine on the lower left; path to Cabana Tschierva on the upper left (July 2004).
In 1988 a landslide fell on Vadret da Tschierva. 300'000 m3 of debris are still moving downglacier. Compare the size of the blocks (centre) with that of the hut far left (July 2005).
North of Vadret da Tschierva's forefield there is a remarkable alluvial plain with a braided river (Ova da Roseg; July 2004).
Sunrise over the summit of Piz Roseg (3937m). From its big hanging glaciers ice avalanches occasionally descend on to the accululation area of Vadret da Tschierva (July 2004).
More hanging glaciers are feeding Vadret da Tschierva from the north and west flank of Piz Scerscen (3971m). Far right Chapütschin da Naiv ("Snow cap", July 2004).
Aerial photo of the Bernina group from NW in 1982. From left to right: Piz Palü, Piz Bernina, Piz Zupo and Piz Argient (in front Piz Scerscen) and Piz Roseg; accumulation area of Vadret da Tschierva on the lower left.
Aerial photo of Vadret da Tschierva from W in 1982, Piz Morteratsch behind; the landslide has not yet happend; tongue of Vadret da Roseg in the lower righthand corner.
Vadret da Tschierva (left) and Vadret da Roseg (right) in 1906. The long glacial lake Lej da Vadret has not yet started to form (photo Schweiz. Alpines Museum).
The tongue of Vadret da Tschierva is still very convex in 1914 and still connected to Vadret da Roseg (far right, partially hidden by the trees; Bild Schweiz. Alpines Museum).
|Photos, unless noted otherwise, Jürg Alean|