Gneiss typically forms under higher pressures than hornfels.

Question

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Gneiss is a metamorphic rock that forms under high pressure and temperature conditions, usually in areas of mountain building or subduction zones. Hornfels, on the other hand, forms under lower pressure conditions, usually from the heating of sedimentary rocks due to nearby igneous intrusions or lava flows. Therefore, gneiss typically forms under higher pressures than hornfels.

Gneiss Typically Forms Under Higher Pressures Than Hornfels