Answer: Volcanic eruptions are responsible for releasing molten rock, or lava, from deep within the Earth, forming new rock on the Earth's surface.... Even though volcanoes are in specific places on Earth, their effects can be more widely distributed as gases, dust, and ash get into the atmosphere. Volcanoes change the earth's surface by allowing molten rock, or magma, to escape the earth and create rock formations or mountains.
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The metamorphic rocks are transformed from the existing rock types. They change with the changes in pressure and temperature. They cover large parts of the earth's crust make up 12% of the earth.
They are made by tectonic processes such as continental collision. That leads to horizontal pressure and distortions some examples may include the gneiss, marble, slate, schist, and quartzite.
