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Rhyolite

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Rock Identification with Willsey: Conglomerate, Breccia, and Diamictite

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How to Identify Hydrothermal Breccia

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Barite In High Sulphidation Epithermals

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Tufa vs Travertine Limestone

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Rock Identification with Willsey: BASALT and its many varieties

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Epithermal Quartz Textures

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Rock Identification with Willsey: Carbonate Sedimentary Rocks (Limestone and Dolostone)