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Swiss Journal of Geosciences
Fig. 1 | Swiss Journal of Geosciences

Fig. 1

From: Distribution, geometry, age and origin of overdeepened valleys and basins in the Alps and their foreland

Fig. 1

Cross-section showing the geological situation of the Lötschberg Tunnel (Berner Oberland). On 24th July 1908 the front of the tunnel collapsed and 25 workers were killed. The accident was due to the unexpected presence of unconsolidated sediments about 200 m below the valley bottom of Gasterntal and a sediment and water slurry penetrated into the construction

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