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| stratigrapher (one studies the different layers of the Earth–namely, the crust, mantle, and core–to gather information about their components, such as oil, minerals, water, soil, sediment, lava, ash, tectonic plates, and rock) | |||
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| stratigrapher (one studies the different layers of the Earth–namely, the crust, mantle, and core–to gather information about their components, such as oil, minerals, water, soil, sediment, lava, ash, tectonic plates, and rock) | |||