al de cke ) ▁has ▁been ▁pushed ▁onto ▁the ▁All g äu ▁B eds ▁made ▁of ▁li as . ▁There ▁are ▁examples ▁of ▁this ▁over th rust ▁plate ▁in ▁many ▁places , ▁for ▁example , ▁in ▁the ▁vic inity ▁of ▁the ▁K empt en ▁H ut ▁( T rett ach ▁Gul ly ) ▁or ▁the ▁R app ense e ▁H ut ▁( Link ers k opf ). ▁In ▁some ▁cases ▁even ▁a ▁double ▁over th rust ▁of ▁the ▁rocks ▁may ▁be ▁observed . ▁Thus , ▁the ▁northern ▁part ▁of ▁H imm el sch ro fen ▁r idge ▁is ▁made ▁of ▁main ▁dol om ite . ▁The ▁southern ▁part ▁consists ▁of ▁li as ▁rock ▁of ▁the ▁All g äu ▁B eds ▁that ▁have ▁been ▁pushed ▁over ▁the ▁main ▁dol om ite . ▁In ▁turn ▁the ▁main ▁dol om ite ▁has ▁been ▁thrust ▁over ▁the ▁All g äu ▁B eds ▁again . ▁ ▁All g äu ▁Pre al ps ▁east ▁of ▁the ▁Ill er ▁ ▁This ▁sub - group ▁is ▁located ▁north ▁of ▁the ▁Ober jo ch ▁s addle . ▁The ▁Ill er ▁valley ▁forms ▁its ▁western ▁boundary , ▁the ▁O stra ch ▁valley ▁del ine ates ▁it ▁to ▁the ▁south ▁and ▁the ▁Vil stal ▁valley ▁to ▁the ▁east . ▁The ▁highest ▁mountain ▁is ▁the ▁Gr ü nten , ▁. ▁These ▁mountains ▁offer ▁a ▁scen ic ▁back drop ▁for ▁le is ure ▁activities , ▁especially ▁for ▁h ik ers . ▁They ▁also ▁have ▁the ▁advantage ▁of ▁being ▁snow - free ▁for ▁longer ▁than ▁the ▁ad