 Oil from this unit, coming from so deep in the earth, emerges at the spectacular and dangerous temperature of .The deepest well in the entire Cymric field was one drilled by the Superior Oil Company, to a depth of , into the "Point of Rocks" formation, of Eocene age.The Nacirema Oil Company discovered the Cymric field in 1909, when they drilled into the huge Tulare pool with their Well No.