Kjemisk bergartsforvitring belyst ved en del leirprofiler.
2, 3, 4
The adsorbed cations through some clay profiles in eastern Norway have proved that a weathering of the potassium bearing minerals has taken place in situ in post-glacial time. This weathering is specially high in the upper 5-6 metres.
It is infered that the solid rocks may undergo similar weathering although the water content and porosity are much lower.