A Walk in the Black Mountains (18 of 22)
The escarpment of Devonian Old Red Sandstone
![[First]](images/nav_first.jpg)
![[Prev]](images/nav_prev.jpg)
![[Index]](images/nav_index.jpg)
![[Next]](images/nav_next.jpg)
![[Last]](images/nav_last.jpg)
