VOLCANO AWARENESS MONTH: How did these Andesite Columns Form?
These columns were once molten lava running slowly down the ridges and slopes of Mount Rainier. When the lava encountered the massive Ice Age glaciers that once filled the park’s valleys, giant predecessors to today’s glaciers, the lava cooled quickly and cracked into narrow hexagonal columns. These columns can be seen at various locations throughout the park. This photo was taken on Sunrise Road.
NPS/John Chao photo ~pw
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