What is granite? A geologist explains!
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33. How to Identify Rocks
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What is basalt ? - A geologist explains
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Basalt | Not Boring At All
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Rock Identification with Willsey: BASALT and its many varieties
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What is amphibole, Hornblende, and asbestos? A geologist explains.
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The Cornubian Batholith: Intro to the Geology of Dartmoor
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What is Feldspar? A geologist explains!
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