B ick erton ▁& ▁D uck ington ) ▁ ▁Ge ology ▁ ▁The ▁hills ▁are ▁composed ▁of ▁a ▁range ▁of ▁sand st ones ▁of ▁Perm ian ▁and ▁Tri ass ic ▁age . ▁North – s outh ▁fault ing ▁is ▁in ▁part ▁responsible ▁for ▁elev ating ▁harder - we aring ▁str ata ▁above ▁the ▁general ▁level ▁of ▁the ▁Ch esh ire ▁P lain . ▁Typ ically ▁the ▁higher ▁summ its ▁are ▁formed ▁from ▁the ▁Hels by ▁Sand stone . ▁ ▁The ▁r idge ▁acted ▁as ▁something ▁of ▁a ▁bar rier ▁to ▁the ▁passage ▁of ▁Irish ▁Sea ▁ice ▁during ▁the ▁last ▁ice ▁age ▁and ▁its ▁hills ▁are ▁et ched ▁with ▁numerous ▁gla cial ▁m elt water ▁channels , ▁many ▁of ▁which ▁formed ▁sub g la cially . ▁Part icular ly ▁spect ac ular ▁examples ▁are ▁those ▁at ▁Ur chin ' s ▁K itchen ▁in ▁Prim ro seh ill ▁Wood s ▁and ▁at ▁Hol b itch ▁S lack ▁near ▁Cot eb ro ok . ▁ ▁Hill ▁for ts ▁A ▁series ▁of ▁Iron ▁Age ▁hill ▁for ts ▁ad orn ▁the ▁r idge ▁from ▁Wood house ▁Hill ▁and ▁Hels by ▁Hill ▁in ▁the ▁north ▁through ▁Edd is bury ▁and ▁K els bor row ▁Castle ▁to ▁Ma iden ▁Castle ▁in ▁the ▁south . ▁ ▁Rec re ation ▁The ▁r idge ▁is ▁travers ed ▁by ▁the ▁popular ▁Sand stone ▁Tra il , ▁a ▁middle - distance ▁recre ational ▁route ▁originally ▁established ▁by ▁the ▁former ▁Ch esh ire ▁County ▁Council ▁between ▁Be acon ▁Hill ▁and ▁Gr ind ley ▁Brook ▁on ▁the