Structuurbodems en vorstwiggen
Grondboor & Hamer , Volume 53 - Issue 1 p. 14- 17
The author observed polygonal structures and frostwedges in a pit, excavated for the construction of a stable. Apparently, the cracks of the polygonal structure and the wedges are filled in with loamy fine sand froma deeper lying layer. The features are described and an interpretation with regard to their origin is presented. The sediments involved have been formed during the Late Periglacial of the Weichsel Glaciation. Extreme cold periods caused shrinkage of the soil and formation of cracks, sometimes in a polygonal pattern. Because the cracks were weak spots in the overlying sediments, the water saturated fine sand could escape upward through the cracksat the same same filling them in.
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