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Important for Cavaglia is the deposit of the «Egesen» stage, which goes back to 11’000 years before our time. At that time the perennial snow level was about 300 m below the present one. Starting in the «Egesen» stage the climate became warmer and glaciers retreated to the higher regions of the Alps. It is assumed that during the so called «Atlantic» stage vegetation returned to the highest regions of the alpine chain.
About 4’000 years ago the climate became more rigid and glaciers once again started to flow downwards. To date sixteen positive oscillations can be counted starting from the «Finiglaciale». In 1850 glaciers reached their greatest expansion after the «Egesen» stage. The Cambrena glacier reached Lago Bianco, the Palü glacier covered the Alpe Palü basin and the edge of the Morteratsch glacier was very close to the present railway station. It should be noted that during the period 1965-1985 the Cambrena and Palü glaciers advanced whilst the Corno di Campo one was always in retreat. The Vedreit da Dügürail, which in the Fifties had a surface covered by beautiful crevasses, has today almost disappeared».
(Aldo Godenzi) |
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The Cambrena glacier and the frozen Lake Bianco
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