▁in ▁E cuador , ▁Colombia , ▁Egypt , ▁Peru , ▁Venezuela , ▁France ▁and ▁the ▁United ▁States ▁in ▁the ▁employ ▁of ▁different ▁oil ▁companies , ▁all ▁affili ates ▁of ▁Es so . ▁In ▁ 1 9 5 2 ▁he ▁earned ▁a ▁Ph . D . ▁in ▁Ge ology ▁from ▁the ▁University ▁of ▁London . ▁He ▁spent ▁several ▁years , ▁ 1 9 4 8 ▁to ▁ 1 9 5 4 , ▁in ▁Peru ▁and ▁from ▁ 1 9 5 8 ▁to ▁ 1 9 6 9 ▁he ▁worked ▁in ▁Venezuela . ▁He ▁was ▁in ▁other ▁places ▁for ▁periods ▁as ▁brief ▁as ▁a ▁few ▁months , ▁but ▁the ▁effect ▁of ▁the ▁rapid ▁succession ▁was ▁to ▁enable ▁him ▁to ▁publish ▁on ▁fa unal ▁sequences ▁encountered ▁around ▁the ▁world . ▁▁ ▁His ▁major ▁accomplish ment ▁was ▁his ▁pione ering ▁work ▁on ▁the ▁potential ▁of ▁pl ank ton ic ▁for amin if era ▁as ▁ideal ▁tools ▁for ▁world wide ▁correlation ▁of ▁Mes oz o ic ▁and ▁T ert i ary ▁str ata . ▁ ▁His ▁many ▁important ▁papers ▁and ▁tal ks ▁related ▁to ▁this ▁subject ▁and ▁his ▁anticip ation ▁of ▁future ▁develop ments ▁had ▁a ▁last ing ▁impact ▁on ▁much ▁of ▁the ▁T ert i ary ▁strat ig raph ical ▁work ▁carried ▁out ▁for ▁dec ades ▁after . ▁▁ ▁Upon ▁his ▁ret irement ▁in ▁ 1 9 6 9 ▁he ▁moved ▁to ▁Victoria , ▁British ▁Columbia , ▁Canada . ▁He ▁was ▁married ▁in ▁ 1 9 4 1 ▁and ▁had ▁two ▁children . ▁In ▁his ▁spare ▁time