Ljørdalen. Beskrivelse til kvartærgeologisk landgeneralkart.
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The area is characterized by the melting in situ of stagnant glaciers. The glacial material of scree and stream deposits date from the dead-ice stage of the inland ice during which it left eskers of more or less sorted sand and gravel. Dead-ice landscapes of potholes, crevasse fillings and morainic ridges occur quite commonly, and practically everywhere mounds and ridges of unsorted glacial scree are piled along the lower slopes. Marine deposits are not known within the boundaries of this map. The remains of the inland ice stagnated in the valleys. To their contents of glacial gravel was added material transported by rivulets from surrounding slopes. Channels and tunnels were excavated in the solid ice by streams that deposited their accumulated aterial as eskers, while gravel inherent in the ice was deposited without any stratification whatever during the more leisurely process of melting. Thus, stratified sand and gravel is dominant at the bottom of the valleys whereas unstratified gravel is native to the slopes, frequently encountered as mounds and ridges. The mountain region of frost-split rocks represents the highest soil region and is dominated by an accumulation of broken rocks rather than by morainic drift.