National Geographic : 1912 May
THE DEVIL'S POST PILE: NATIONAL MONUMENT, IN THE SIERRA NATIONAL FOREST The Devil's Post Pile is a remarkable example of basalt columns, which are fairly regular and ordinarily hexagonal incross sections, although pentagonal and other shapes are not uncommon. The average diameter is about two feet. The columns,or so-called posts, lieinthe pile atall angles, from vertical to almost horizontal. Photo and note by W. L . Huber.