GARY HINCKS / SCIENCE PHOTO LIBRARY GARY HINCKS / SCIENCE PHOTO LIBRARY
Geological rock cycle. Cutaway artwork showing the cycle in the Earth's crust between different types of rock. At this subduction zone heavier oceanic rock (purple-brown) is descending under continental rock (light brown) and being destroyed to form molten rock (orange) and volcanoes. Above ground, erosion carries sediment along rivers to the sea, forming sedimentary rocks. The nine basic stages are: magma; rock crystallization; igneous rocks; erosion; sedimentation; sedimentary rocks; tectonic burial and metamorphism; metamorphic rocks; and melting. See C014/4793 for this artwork with arrows.
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