Fracking in Arizona Could Lead to the Next Helium Boom

The high desert of northern Arizona was once a tropical forest, home to large animals with sharp teeth—crocodilians, small dinosaurs, and reptiles. Freshwater sharks swam in the streams. Trees fell, animals died off, and the whole mess fossilized in layers of primordial muck. Millions of years later, the desert heaved up petrified logs, sharks teeth, and bones. We know this area today as Petrified Forest National Park—a place where tourists can hike and take in sweeping views of the Painted Desert. https://www.sierraclub.org/sierra/fracking-arizona-could-lead-next-helium-boom-petrified-forest-national-park
Article courtesy of Sierra by Ron Duncan