Show unexplored there has hag not been a careful exploration of the geographical formations of and such observations as aa have been made are so BO limited that they afford only tho the means of reaching a rough estimate of the extent and distribution trib ution of the different rocks it la Is known that there are large iron ore deposits on clarke armstrong and curran islands in hudson bay two of the islands are estimated to contain about three hundred and sixty five million tons of iron ore from to has baa already been expended in the exploration of these iron deposits tho the ore la Is sald eald to be of fine quality the beds ranging from seven to fifteen feet in thickness |