| 1. | The primary rocks are Quartzite overlaid with an irregular slaty formation.
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| 2. | The mountain's primary rock is from the Hayes Butte Basalt flows.
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| 3. | The primary rock that makes up the mountain is basalt.
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| 4. | Today, sandstone, shale, granite, and serpentine are the primary rock types in the Chetco region.
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| 5. | The primary rocks are metamorphic, mostly quartzites and slate.
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| 6. | The bedrock is Silurian, primary rock type is Dolostone with Shale being the secondary rock type.
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| 7. | Overall, acid and primary rocks resulted in the most radioactive emanation; mafic and sedimentary rocks demonstrated less radioactivity.
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| 8. | The primary rock that makes up the mountains is rhyolite which in some areas has been mineralized by geothermal forces.
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| 9. | Basalt is the primary rock type at Big Dan, forming part of the Arsenic Lake Formation, the site's major geologic feature.
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| 10. | Basalt and andesite are the primary rock types at Beanland, forming part of the Younger Volcanic Complex, the site's major geological feature.
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