Basalt Columns in Idaho
August 20, 2007
A common feature of basalt are four, five, and six-sided columns (these are most common). These columns form as lava cools, and they're found worldwide. Devils Tower in Wyoming and Giant's Causeway in Ireland are notable large-scale examples. The much smaller columns shown above are about 8 inches across (20 cm) and are located along the trail to Elk Creek Falls, in northern Idaho. This area is part of the Columbia Plateau -- one of the largest flood basalts to ever cover a portion of the Earth's surface. Photo taken on May 10, 2007.