Columnar joints in horizontal orientation along the Ricksecker lava...
Detailed Description
Columnar joints in horizontal orientation along the Ricksecker lava flow margin. Columns formed as lava cooled against valley filling glaciers leaving flows perched high on Mount Rainier's ridges.
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Glaciers Help to Shape Mount Rainier
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Glaciers Help to Shape Mount Rainier
The modern glaciers that grace the slopes of Mount Rainier are much smaller descendants of the vast ice masses that repeatedly overwhelmed the Cascade Range during Pleistocene time.