Leirfallet ved Kverne i Stokke 1944.
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- Artikler 
In a marine clay deposit at Kverne in Stokke, near the town of Tønsberg, a great fall of the ground took place on Oct. 9th, 1944. The area hit by the slide amounts to 76 500 sq. metres of well cultivated field. Through a narrow opening of a width not exeeding 25 metres, a mud-flow ran from the sliding hollow to a little stream, the Merkedamselv, filling the river bed with liquid mud and swimming blocks of firm clay, upstreams as well as downstreams. The area of the sunk ground is surrounded by a steep clay-wall several metres high. Probably the catastrophe has been caused by a small displacement of the ground forming a steep wall at the little slope to the stream, now the spot where the opening is to be seen. The occurrence of a vertical precipice in the clay- ground may produce an unstable situation. Where the clay in the underground is soft and unable to sustain the weight of the steep wall, it will squeeze out from the sole forming a mud-flow. This causes the clay wall to break down. In a homogenous clay formation this process repeats itself. Witnesses have observed that the border of the landship moves step by step. At last the slip reaches a åplace whee rocky ground or a firm clay in the underground is able to stand the pressure, at which the fall of the ground stops.