Columnar jointing is a common feature in many basaltic lava flows and intrusions around the world. Spectacular arrangements of columns have fascinated observers for centuries, and numerous hypotheses ...
Columnar basalt from the Siberian flood basalts on an island in the Angara river, south of the volcaniclastics province. Left to right: Scott Simper, Lindy Elkins-Tanton, Sam Bowring, Seth Burgess and ...
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