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ZONE ADRÉNALINE La Cyber-encyclopédieMillA millis a well cut into a glacier by melt water and/or rainwater found on the glacier surface, to reach the network of paths and galleries inside and under the glacier. This network generally reaches down to the rock base and the water re-emerges at the glacial face. An active mill is fed by one or more rills, torrents of water found on the glacier’s surface. If a rill dries up, the mill itself is no longer fed and has a tendency to close up due to the action of the movement of the ice. We can find mills in all types of glaciers but the largest are generally more frequently found in ice sheets and ice caps. We can make an analogy between mills and the sinkholes we often find in karstic networks. As an ice sheet or ice cap moves up a slope, mills can create hydrostatic pressure which permits the formation of a tunnel valley under the ice. Voir aussiInfrarouge Inlandsis Vos témoignagesSoumettez votre propre témoignage ! Vos documents suggérésSoumettez votre document ! Vos liens suggérésSoumettez un lien ! Retourner à la Cyber-encyclopédie |
   
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