However, the rivers aren't the only force of erosion. Summer thunderstorms bring heavy rains that scour the landscape. Some layers erode more easily than others. As softer rock dissolves away, layers of harder rock form exposed shelves, giving the canyon walls their stair-step appearance. Occasionally, a slab of harder rock will protect a weaker layer under it, creating balanced rocks and towers. Great examples of this are visible in Monument Basin at Island in the Sky and the Land of Standing Rocks in The Maze.
[{"rock_types": "n/a", "era_formed": "n/a"}]
[{"rock_types": "Island in the Sky", "era_formed": "n/a"}] [{"rock_types": "n/a", "era_formed": "n/a"}]