Agent TypePersonActivities & OccupationsGeologistsHistoryIan Charles Henderson Croll was employed at the Mines Department after graduating B.Sc at the University of Melbourne. During a leave of absence, he was seconded by the Commonwealth Oil Refineries Ltd. as assistant to Dr. K. Washington Gray who was conducting a geological investigation into the possibility of obtaining commercial supplies of petroleum in Australia. In 1936, Croll resumed duty at the Mines Department conducting various geological surveys in Queensland.
