more than 1350m
| Yoredale Group|
| Lyne and Fell Sandstone formations, Kershopefoot Basalt Beds|
siltstone, limestone, dolostone, conglomerate, basalt
Border Group Wikipedia
The Border Group is a Carboniferous lithostratigraphic group (a sequence of rock strata) in southern Scotland and northernmost England. The name is derived from the Scottish Border region. The rocks of the Border Group have also previously been referred to as the Lower, Middle and Upper Border groups.