List of Slides for Devil's Postpile NM

• The lava flows at Devil's Postpile date back to 3 - 3.5 million years ago. Columnar jointing developed as the lava cooled. Today the basalt splits between the columns, so that symmetric pieces accumulate as talus at the base of the slope.
• Ends of columns show as regular hexagons on the top surface of the basalt.
• This is the best example of columnar jointing in California.