Area calculations of Fig. 2b show a 73% distribution of
furrows as opposed to 27% of ridges after six years of
abandonment, corresponding to three times more prevalent
sedimentary crusts than the thinner structural crusts on the field
surface. This is representative for young abandoned fields
because of the regular tilling pattern. In any case, the percentage
of furrows and sedimentary crusts increase with aging.
3.2. Description of the thin sections
The photographs of the thin section were taken with
polarised light so that the resin-filled voids appear black. Five
representative thin sections are described and interpreted. They
originate from ridge and furrow crusts and one alluvial fan crust