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Frenchman Coulee lava columns (0593)-20120620-_ILO0593.jpg

These massive stacks of flood basalt are several stories tall and date back millions of years. Frenchman Coulee near Vantage, WA is part of the Columbia River Basalt Group. "A flood basalt or trap basalt is the result of a giant volcanic eruption or series of eruptions that coats large stretches of land or the ocean floor with basalt lava."
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© Ilona Berzups
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NATURE
These massive stacks of flood basalt are several stories tall and date back millions of years. Frenchman Coulee near Vantage, WA is part of the Columbia River Basalt Group. "A flood basalt or trap basalt is the result of a giant volcanic eruption or series of eruptions that coats large stretches of land or the ocean floor with basalt lava."