On Friday Vincent and Dad made the first of our two trips this week to the bluffs. The bluffs are particularly nice on a sunny fall afternoon. Vincent is still a bit small to do the hike to the top but we had fun never the less. The bottom of the bluffs contain 70,000 year old deposits of clay and sand where a wealth of fossils have been deposited. Four glacier advances and retreats can be identified in the various layers with the last being 12,000 years ago.
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