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Geology of National Parks, 3D and Photographic Tours

Pinnacles National Monument
This gravel bar and dry stream channel of Chalone Creek is on the east side of Pinnacles National Monument (below a new bridge). The valley of Chalone Creek and its tributaries has a history of floods and debris flows (Meyer, 1995). In 1998, heavy rains resulted in debris flows that destroyed a park bridge and spread gravels throughout the valley. In this photo, taken in 2003, the gravel deposits still covered the valley floor and only a small sandy channel had formed in the years since the flood.
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