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on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek.
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on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek.
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on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek.
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on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek.
