▁series ▁of ▁terminal ▁mor aines ▁that ▁runs ▁from ▁southern ▁Norway ▁through ▁D als land , ▁Sk arab org ▁and ▁Ö ster g öt land , ▁continu ing ▁under ▁the ▁Balt ic ▁Sea ▁into ▁southern ▁Finland ▁and ▁Russia ▁as ▁the ▁Sal p aus sel k ä ▁m ora ine ▁which ▁separ ates ▁la kes ▁Lad oga ▁and ▁Sa ima a . ▁These ▁mor aines ▁were ▁formed ▁during ▁the ▁Young er ▁D ry as ▁period , ▁about ▁ 1 1 , 0 0 0 ▁years ▁ago , ▁when ▁the ▁ice ▁cap ▁from ▁the ▁last ▁ice ▁age ▁tempor arily ▁ceased ▁withdraw ing ▁and ▁rocks ▁and ▁other ▁gla cial ▁materials ▁emer ged ▁from ▁the ▁mel ting ▁ice ▁were ▁depos ited ▁in ▁front ▁of ▁the ▁gla cier ▁termin us . ▁ ▁The ▁narrow ▁pen ins ula ▁is ▁about ▁five ▁kilom eters ▁long ▁and ▁never ▁wider ▁than ▁ 1 0 0 ▁meters , ▁usual ▁significantly ▁nar ro wer . ▁Its ▁highest ▁elev ation ▁over ▁the ▁level ▁of ▁lake ▁V än ern ▁ ▁is ▁ 2 1 ▁meters . ▁H ind ens ▁rev ▁is ▁highest ▁by ▁the ▁main land , ▁and ▁low ers ▁gradually ▁until ▁it ▁sub mer ges ▁after ▁five ▁kilom eters . ▁The ▁formation ▁continues ▁under ▁water ▁as ▁a ▁series ▁of ▁re ef s . ▁At ▁high ▁t ide ▁its ▁extreme ▁point ▁becomes ▁five ▁small ▁island ▁called ▁K illing arna ▁(" the ▁[ go at ] ▁K ids "). ▁The ▁m ora ine ▁re app ears ▁twelve ▁kilom eters ▁away ▁on ▁the ▁western ▁shore ▁of ▁V än ern