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Volcanics
A major group of rocks that form at or near the Earth’s surface through volcanic activity. These rocks originate from molten magma that erupts from a volcano, cools, and solidifies. Volcanic rocks are typically fine-grained due to rapid cooling and include types such as basalt, andesite, rhyolite, and volcanic glass like obsidian. Volcanics play a significant role in shaping landscapes and recording geologic history.
They are a key component of the Earth's crust, especially in regions with a history of volcanic eruptions.
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