William Buckland

“ Having described as far as I know the extent of the slate and greenstone, with the subordinate rocks and dykes that accompany them, I will now consider the strata by which they are encircled, and which on the east side are widely different from those on the west.
On the east side beneath the outcrop of the great limestone series of Cross Fell, (of which Mr. Winch gives the thickness at 450 fathoms,) the old red sandstone, in the form of a conglomerate, is regularly interposed between the lowest stratum of the above series and the slate, with no appearance of any great derangement. ”

“ On the summit of this Pike, which is nearly conical, and steep on all sides, is an outlying hummock of coarse grained sandstone, agreeing in substance with one of the lowest strata in the neighbouring escarpment, and more recent than the old conglomerate. Whether this latter rock, or any traces of slate, are interposed between the summit of the pike and greenstone of its base, we had no opportunity to ascertain. ”

“ They assume greater strength in their progress towards the south, and the position of the greenstone becomes more decided on the west of the narrow line of slate. [2] The variety of proportions in which its ingredients are found combined is quite endless; every hill, almost every block, gives a new character of it.
These rocks of slate and greenstone form two parallel narrow ranges, displaying on the surface an irregular outline, and attracting attention by the striking feature of three lofty conical pikes, distinguished by the names of Knock pike, Dufton pike, and Murton pike. ”