Sea leve/ Sea /eve/ Legend Drift and talus (within limits of contoured area) Magnetite mens a royv S Quertz Arorite Cargely replaced by silicates and magnetite) ; Quartz diorite (in parts, replaced by secondary minerals) North (approximate) Quartz diorite —— Limestone Underground workings in magnetite Scale of feet Geological Survey, Canada. QO ern 0 ee CONTR LOOES QO. Figure 16. Magnetite deposit, Prescott mine, Texada island, B.C. Contour interval, 20 feet. 17135—7