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Rock Scenery of the Hudson Highlands and Palisades
Rock Scenery of the Hudson Highlands and Palisades Author:Jerome Wyckoff Tells briefly the region's dramatic geological history, from the formation of mountains a billion years ago through ages of volcanism, earth movements, stream erosion, and the Pleistocene glaciations...Explains and illustrates Hudson Fiord, shapes of hills and valleys, weathered rocks and cliffs, ponds and waterfalls, deltas and boulder fields, ... more »potholes and balanced rocks, talus slopes and exfoliation shells, and marks made by glacier ice 18,000 years ago.« less