▁rid ges ▁at ▁the ▁e pon ym ous ▁c ape , ▁alternate ▁between ▁sand y ▁and ▁gra vel ly ▁rid ges ▁and ▁narrow ▁p onds . ▁Loc ated ▁entirely ▁above ▁the ▁Ar ctic ▁Circle ▁in ▁a ▁region ▁of ▁per ma f rost , ▁the ▁monument ' s ▁lands ▁include ▁typical ▁therm ok ar st ▁features . ▁ ▁Description ▁Cape ▁Kr us enst ern ▁National ▁Monument ▁compr ises ▁the ▁coast ▁of ▁the ▁Ch uk chi ▁Sea ▁from ▁the ▁opening ▁of ▁the ▁H oth am ▁In let ▁at ▁the ▁mouth ▁of ▁the ▁Kob uk ▁River , ▁extending ▁north wards ▁along ▁the ▁coast ▁to ▁a ▁point ▁just ▁short ▁of ▁Im ik ru k ▁L ago on . ▁It ▁extends ▁in land ▁toward ▁the ▁Kob uk ▁Valley ▁about ▁, ▁with ▁a ▁high ▁point ▁in ▁the ▁north ▁at ▁K ik m iks ot ▁Mountain ▁() ▁in ▁the ▁Mul gra ve ▁Hills ▁and ▁in ▁the ▁south ▁at ▁Mount ▁No ak ▁() ▁in ▁the ▁Ig ich uk ▁Hills . ▁The ▁coast line ▁is ▁marked ▁by ▁a ▁series ▁of ▁l ago ons ▁separated ▁from ▁the ▁sea ▁by ▁sand sp its . ▁The ▁largest ▁is ▁the ▁Kr us enst ern ▁L ago on ▁at ▁Cape ▁Kr us enst ern . O thers ▁include ▁the ▁Kot lik ▁L ago on , ▁Im ik ▁L ago on ▁and ▁A uk ul ak ▁L ago on . ▁ ▁The ▁local ▁bed rock ▁is ▁composed ▁of ▁lim estone , ▁dol om ite , ▁ph yll ite ▁and ▁ch ert ▁from ▁the ▁P rec amb rian ▁through