usca9865 Hexagonal basalt tiles, afternoon, Devils Postpile National Monument. California, USA http://www.terragalleria.com/california/picture.usca9865.html usca9867 Columnar basalt, afternoon, Devils Postpile National Monument. California, USA http://www.terragalleria.com/california/picture.usca9867.html usca9869 Columns of basalt, afternoon, Devils Postpile National Monument. California, USA http://www.terragalleria.com/california/picture.usca9869.html usca9868 Blocks and columns of basalt, Devils Postpile National Monument. California, USA http://www.terragalleria.com/california/picture.usca9868.html usca9866 Hexagonal basalt colums, afternoon, Devils Postpile National Monument. California, USA http://www.terragalleria.com/california/picture.usca9866.html