Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are formed from the broken remains of other rocks that become joined together.

The gigantic Yellowstone Grand Canyon, lined with volcanic rock. With all the effects of hydrothermal activity, river erosion ...

Oak Park is a 9-acre park situated on one of the many sedimentary ... beautiful ledges made of sandstone, limestone, shale and coal. It's a great spot for experienced rock climbers, with dozens ...