The mountains in the park are capped by the Mississippian Burgoon Sandstone, which is underlain by the transitional Devonian-Mississippian Rockwell Formation, consisting of crossbedded argillacious sandstone with some shale beds.
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The bedrock in the valleys of the park consists of the Upper Devonian Catskill Formation, consisting of sequences of sandstone, siltstone, and shale.
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Willow Springs picnic area opens the weekend before Memorial Day and closes the day after Thanksgiving.
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