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The Lithological Map Viewer is a 3D globe showing the types of rock which are present at the surface of the Earth across the whole planet.Lithology is the classification of rocks based on their visible physical characteristics at outcrop. These classifications are normally based on the color, texture, grain size, and composition of the rock. Because lithology classifies rocks at outcrop it can play a key role in understanding processes occurring on the surface of the Earth, for example processes concerning soils, ecosystems, rivers, and oceans. The three main types of rock are sedimentary, igneous, metamorphic. The Lithological Map Viewer shows sixteen different classes of rock.
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