
A large 'gash' or 'crack' has opened up on the side of Wyoming's Bighorn Mountains. SNS Outfitters & Guides first alerted the world about it on October 23.

It's not clear what caused the ecological phenomenon, but an engineer in Wyoming found that a small spring "caused the bottom to slide out" and shifted 15 to 20 million yards of earth, according to SNS.

The Wyoming Geological Survey called it an "apparent active landslide." "It appears that this event may be due to groundwater creating weakness in an unstable hillside," the organization said on its Facebook page.

Randy Becker of Casper, Wyoming, was elk hunting when he came across the cracks. "It is so large ... it is remarkable to see," he told CNN.

Becker said the crack "appears to be 50-60 feet at its deepest point" and "at least 50, 60, maybe 70 yards across."


