What is oil shale?
Answer to relevant QuestionsWhere are the big reserves of oil shale in the United States? (See Fig. 7.5.)Is iron ore a resource that is in short supply?Where are the rare earth elements such as zirconium, lithium, beryllium, and columbian‘tantalum found?Why are phosphates an important nonmetallic mineral resource?Describe supergene enrichment (secondary enrichment) of a pyrite- and chalcopyrite-bearing rock by weathering processes (Fig. 7.9).
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