Petrologic

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Where ever you live on the face of the Earth, you are sitting on a petrologic treasure. All you need are the proper eyes to see it. This application offers you a short description for 36 igneous, 29 sedimentary and 24 metamorphic rocks. The description includes four photos, the chemical composition, the texture and mineral components, the genesis and distribution, the physical and mechanical properties and some of the economic uses for each rock.