Over a century ago, trees cut down from old-growth forests in the upper midwestern United States routinely sank in the cold waters of Lake Superior while being floated downstream to furniture makers. The cold lake waters have preserved these logs, and today furniture makers are raising them from the depths to make custom furniture. Can you think of a way to use these trees for paleo-climate purposes? How could you get around the problem of not knowing exactly when the trees were cut down?
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