Unit Description HCl* Field interpretation 1 Angular platy fragments of grey siliceous limestones (60%) in a greyish brown silty matrix (40%). Clast-supported, no preferred orientation of elements. Well-developed forms of sorted polygonal patterned grounds on the surface. - In situ cryoclasts bedrock derived, reworked by frost and thaw processes. 2 Light yellowish brown silt containing few limestone angular fragments. Well-developed platy structure. ++ Aeolian deposit.