Petrified Forest and the Ongoing Fossil Heist

The logs scattered across the Painted Desert are two hundred twenty-five million years old. They were trees, enormous conifers that fell in a floodplain forest during the late Triassic period, when the Arizona desert was equatorial lowland. The logs were buried in sediment, their cells gradually replaced by silica over millions of years, until they became what they are now: stone that still looks like wood, cross-sections showing annual growth rings, bark texture preserved in quartz.

By the eighteen eighties, people were hauling them away by the wagonload.

A jeweler in Holbrook was selling polished chips and slabs commercially. Entrepreneurs were talking about crushing petrified wood into abrasive powder for industrial use. An estimated twelve tons per day were leaving the site. Theodore Roosevelt, who was shown the area in nineteen oh three during his tour of the Southwest, was moved to act. In nineteen oh six, he used the Antiquities Act to declare Petrified Forest a national monument, the same authority he would use roughly thirteen months later for the Grand Canyon. The specific and stated reason was stopping the theft.

The theft did not stop.

Studies conducted by the National Park Service suggest that approximately twelve tons of petrified wood, roughly twenty four thousand pounds, are still removed from the park every year. The number comes from visitor surveys and ranger observations extrapolated across visitor counts, not from a peer-reviewed physical measurement, so the figure should be taken as an estimate. But park staff describe a consistent, ongoing problem. Visitors take chips. Some take more. The signs asking people not to take even a small piece have been there for more than a century.

The park also maintains a Conscience Wood collection: petrified wood that visitors mailed back after taking it home, sometimes with notes expressing guilt or describing runs of bad luck they attributed to the theft. The collection spans decades. The wood is two hundred twenty-five million years old. The guilt arrives by post.