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Archaeological layers

A midden composed mostly of fish bones and urchin shells, shows a long history of occupation on Umnak Island, interrupted by one significant volcanic island that left a cinder layer through the middle.
— A midden composed mostly of fish bones and urchin shells, shows a long history of occupation on Umnak Island, interrupted by one significant volcanic island that left a cinder layer through the middle.

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By Ground Truth Trekking

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