In the 48 million years since the slide occurred, erosion has removed most of the portion of the slide sheet which moved out into the Bighorn Basin, leaving just one big block of carbonate rocks—Heart Mountain. Farther south, a large block of carbonate rock forms Sheep Mountain, which lies just south of the road that goes from Cody into Yellowstone Park.
Over 48 million years, erosion has removed most of the slide sheet's portion that moved into the Bighorn Basin, leaving only one big block of carbonate rocks—Heart Mountain. To the south, a large block of carbonate rock forms Sheep Mountain, which is located just south of the road leading from Cody to Yellowstone Park.