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What are two examples of heat or pressure that can form metamorphic rock?
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#1. An example of contact metamorphism is the metamorphic rock marble. Marble is created from limestone that has been subjected to heat.
#2. Dynamic metamorphism is metamorphism that is produced in zones such as faults or thrusts that are under high amounts of pressure. The way that this form of metamorphism works is that rocks are scraped against each other causing them to be ground into a powder. Then this powder is reformed due to the pressure in the zone and the heat caused by friction of the two rock surfaces. Due to the given conditions, we can determine that this metamorphism is mainly dependent on pressure and requires relatively low temperatures.
How it happens: The heat and pressure comes from inside the earth. From the upper mantle up to within a few kilometers of the surface of the earth there is a tremendous amount of heat and pressure. This heat and pressure increase with depth. Plate tectonics add to he heat and pressure when they collide.