▁Lap land , ▁and ▁in ▁ 1 9 1 8 , ▁he ▁worked ▁at ▁Bear ▁Island . ▁In ▁ 1 9 2 1 ▁he ▁led ▁a ▁Norwegian ▁expedition ▁to ▁Nov aya ▁Z em ly a . ▁He ▁joined ▁the ▁ 1 9 2 7 - 2 8 ▁Ant ar ctic ▁exped itions ▁of ▁Lars ▁Christ ensen , ▁and ▁he ▁edited ▁the ▁scientific ▁results ▁from ▁these ▁exped itions ▁. ▁He ▁was ▁the ▁doctor al ▁ad visor ▁of ▁B j ør n ▁G . ▁Anders en , ▁whose ▁subsequent ▁works ▁on ▁Qu atern ary ▁ge ology ▁he ▁greatly ▁influenced . ▁ ▁In ▁the ▁Second ▁World ▁War ▁he ▁was ▁a ▁member ▁of ▁the ▁Norwegian ▁resistance ▁movement . ▁ ▁Hol ted ahl ▁died ▁in ▁Os lo ▁on ▁ 2 6 ▁August ▁ 1 9 7 5 . ▁ ▁Family ▁He ▁married ▁T ora ▁G ur stad ▁in ▁ 1 9 1 2 . ▁Their ▁children ▁include ▁Professor ▁of ▁ge ology ▁Hans ▁Hol ted ahl ▁( 1 9 1 7 – 2 0 0 1 ). ▁ ▁Hon ors ▁and ▁awards ▁W oll ast on ▁Medal ▁( 1 9 5 1 ) ▁Elect ed ▁member ▁of ▁the ▁Royal ▁Society ▁in ▁ 1 9 6 1 ▁ ▁References ▁ ▁External ▁links ▁▁ ▁O la f ▁Hol ted ahl : ▁ 2 4 . ▁juni ▁ 1 8 8 5 ▁— ▁ 2 6 . ▁august ▁ 1 9 7 5 , ▁in ▁the ▁Norwegian ▁Journal ▁of ▁Geography , ▁Volume ▁ 3 0 , ▁Issue ▁ 1 , ▁ 1