ia kh vi , ▁K s ani ▁and ▁Did i ▁L ia kh vi ▁origin ate ▁from ▁the ▁K eli ▁vol can ic ▁area , ▁and ▁some ▁pe aks ▁d rain ▁into ▁the ▁T erek ▁river . ▁Several ▁mountain ▁ranges ▁separate ▁the ▁area ▁into ▁distinct ▁high ▁pla ins . ▁Qu atern ary ▁D ac ite ▁la va ▁flows ▁over lie ▁th ich ▁Mes oz o ic ▁sed iment ary ▁sequences . ▁▁ ▁Western ▁K hor is ar ▁( e lev ation ▁ 3 7 3 6 ▁m ) ▁and ▁Did i - N ep isk alo ▁( 3 6 9 4 ▁m ) ▁are ▁the ▁highest ▁summ its ▁close ▁to ▁the ▁cr est ▁of ▁the ▁Gre ater ▁C au cas us . ▁In ▁the ▁n ort he astern ▁part ▁of ▁the ▁system ▁are ▁the ▁Nep isk alo ▁vol cano es ▁and ▁several ▁smaller ▁structures . ▁The ▁Pat ara - N ep isk alo ▁vol cano ▁is ▁strongly ▁de grad ed ▁by ▁gla cial ▁action ▁and ▁may ▁have ▁had ▁a ▁cal der a . ▁Other ▁vol cano es ▁are ▁Sh ark h ok h , ▁Northern ▁Sh ad il kh ok h , ▁and ▁Southern ▁Sh ad il kh ok h ▁in ▁the ▁western ▁Ka id on ▁range ▁and ▁the ▁la va ▁flows ▁created ▁by ▁the ▁latter ▁two ▁vol cano es ▁between ▁the ▁Ark hi ▁Range , ▁K eli ▁Lake ▁and ▁the ▁Arag v ist avi ▁river , ▁the ▁Er man i – A kh ub ata ▁la va ▁plate au , ▁Eastern ▁Sh