Smith Rocks, Cascade Mountains
SKU:
$350.00
$98.00 - $350.00
per item
Ref.#19 7717 ~ Smith Rocks, Cascade Mountains
The geology of Smith Rocks is volcanic. Approximately 30 million years ago, a large caldera was formed when overlying rock collapsed into a massive underground chamber. That material solidified into Smith Rock Tuff (compressed volcanic ash). Then rhyolite flows intruded along faults in the tuff becoming the towering Smith Rocks. A half million years ago basalt flows flowed in from nearby volcanoes visible now as the rimrock on which the parking lots sit. Finally, the Crooked River cut its way through the layers of rock to create today’s geographic features
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