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Unformatted text preview: also called intrusive igneous rocks. Those rocks have solidified below ground, and the name comes from the Greek god of the underworld Pluto. The differences between these two types of igneous rocks would be if the molten rock solidified above or below ground. These rocks can be found on many islands that have been formed due to volcanic activity. These rocks are only found in areas that have or have had active volcanoes. These rocks are porous, and have a rough surface and look like a sponge. This would be the foundation of the Hawaiian Islands and would be very common in those areas....
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- Spring '11