Stanage south end: channel erosion surface

The southern end of Stanage Edge, the longest of the Eastern Edges, in the Peak District National Park, Derbyshire.

Stanage Edge is comprised of Rivelin Grit (aka Chatsworth Grit), Namurian age, Upper Carboniferous. The coarse-grained gritstone was deposited in a series of delta distributary channels. The gritstone is normally strongly cross-bedded, and intraformational erosion surfaces (as in this photo) are common.