Here is a list of things that Rate-o has reviewed with category Economic geology:  

number of years of iron ore left at current rate of use, number of years of ore left at current rate of use of lead, number of years of ore left at current rate of use, number of years of ore left at current rate of use aluminium, number of years of ore left at current rate of use lead, number of years of ore left at current rate of use iron, number of years of iron ores left at current rate of use, number of years of iron ores left at current rate of use, nickel ore, number of years of aluminum ore left at current rate of use, number of years of aluminium ore left at current rate of use, number of years of aluminium ore left at current rate of use, number of years of ore left at current rate of use of iron, number of years of ore left at current rate of use of aluminium, number of years of ore left at current rate of use of aluminium