Understand shale as a result of geological process, not just a physical object. The valley was rich with geological formations, including layers of shale.
Pro Tip 2/3
Soft and Layered
Remember shale is distinctive for being soft and having thin layers. You can easily break the shale apart due to its thin layers.
Pro Tip 3/3
Erosion Susceptibility
Shale is prone to erosion, which is important in understanding its impact on landscapes. The shale cliffs are eroding faster than the harder rock formations.