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Eric sat looking at the rocks for a few minutes, but then noticed that the sun was setting fast. He had to hurry!
Suddenly, Eric remembered that his textbook had descriptions of each type of rock. He opens the book to learn about each rock.
Igneous rocks form from the cooling of lava, usually at the Earth’s surface. Eric collected samples of Obsidian and Pumice.
Obsidian is black but very shiny, while Pumice is light-colored with many holes and is so light that it can float on water.
Metamorphic rocks form deep below the Earth’s surface where they have been modified by heat and pressure. Eric collected samples of Marble and Lapis Lazuli.
Marble is usually a light colored rock with a gritty touch and Lapis Lazuli has a very distinct blue color to it.
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