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Pasterze Glacier, valley glacier in the Großglockner Mountains, largest glacier in Austria, nature reserve, stretches from the firnfield of the Johannisberg mountain (alt. 3,460 m) to the south east. It reached its glacial maximum in 1856, but since then its length and thickness have been decreasing. Strata are Pasterze bed (Boden), Upper, Middle and Lower Pasterze glacier. The glacier grows from névé basins in the Pasterze bed (Boden). The crevasse of the ice fall is quite steep and thick where it meets the Middle Pasterze stratum, the zone of glacier ablation. The Glocknerstraße road leads to the Pasterze glacier.