Lerfall på eiendommen Solbakken i Sandar.

Abstract

This place is situated 1 km North West of the town Sandefjord. In Dec. 1934 a small landslip broke a slope along a rivulet. The wasted area amounted to 1000 sq. m. In the spring of the next year another slip occurred. In the upper part of the slip where the ground sunk, a steep wall 2-4 m high limited the sliding; and at the lower part the ground rose to such an extent that the brook was dammed, and a pool of 3 m depth was formed behind the barrier. Weak and liquid clay was not to be seen. Still, it seems probable that the underground clay is so weak that a stabilizing movement has taken place in the deeper layers, the plastic clay lying on a level with the bottom of the valley or deeper.