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  • Igneous Rocks: What Forms From Cooling Magma?
    Magma, when it cools and solidifies, can turn into a variety of igneous rocks. The specific type of igneous rock depends on the chemical composition of the magma and the way it cools.

    Here are some common examples:

    Intrusive Igneous Rocks (formed when magma cools underground):

    * Granite: A light-colored, coarse-grained rock with high silica content.

    * Diorite: A medium-grained, dark-colored rock with a mixture of feldspar and hornblende.

    * Gabbro: A dark-colored, coarse-grained rock rich in plagioclase feldspar and pyroxene.

    * Peridotite: A dark-colored, coarse-grained rock composed primarily of olivine and pyroxene.

    Extrusive Igneous Rocks (formed when lava cools on the surface):

    * Rhyolite: A light-colored, fine-grained rock with high silica content.

    * Andesite: A medium-grained, dark-colored rock with a mixture of feldspar and hornblende.

    * Basalt: A dark-colored, fine-grained rock rich in plagioclase feldspar and pyroxene.

    * Obsidian: A black, glassy rock that cools very quickly.

    * Pumice: A light-colored, porous rock with many air bubbles.

    These are just a few examples, and there are many other types of igneous rocks that can form from magma. The specific minerals present and the texture of the rock depend on the cooling rate, pressure, and chemical composition of the magma.

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