4 
THE GEOLOGISTS 
last beds dip 48° a little to the N. of W.j abutting against the 
lower beds of water-stone^ there dipping 7^ a little to tbe W. of 
S. From Quarry Bank water-stone occupies the BoUin to Ash- 
ley, and is again found at Brownlow Mill. The bunter-sand- 
stein_, more northerly, is found at Barlow Hall, and extends 
thence by Cheadle and Stockport to Poynton, where it overlies 
the coal. Returning to Barlow Hall, it is seen in the brook 
near Hough^s End, and extends to Chorlton-on-Medlock, where 
it is described by Mr. Binney in his paper on the geology of 
this neighbourhood. 
Crossing to the northern side of the Peckforton fault, the 
identity of the Northwich and the Winsford salt was first 
shown. The depth to the upper salt at Nortliwich is 135 feet ; 
at Wharton (the place where the rock salt of Winsford district 
is worked), the depth is 150 feet. At Northwich, the thick- 
ness of the upper bed is from 75 to 90 feet ; at Wharton, 120 
feet. At both places this bed is impure. The thickness of the 
bed between this mine and the second salt is, at Nortmch, 30 
feet ; at Wharton, 36 feet. This stratum at both places is com- 
posed of indurated marl, with gypsum and veins of salt traver- 
sing it. At both places the next stratum is the thick bed of 
salt. This has been now penetrated at Northwich, and found 
to be from 96 to upwards of 117 feet in thickness. The upper 
part at Northwich, for a thickness of from 69 to 75 feet, is not 
worked, being impure; and only the 12 or 15 feet underlying 
that portion are got. At Wharton, the highest 75 feet of the 
second salt are not worked; but only the 15 feet below that 
depth. Along the Weaver to near Frodsham, brine springs and 
gypseous beds are found in various places, on both sides of the 
Weaver. The strata are, however, much broken. Thus, at a 
small brook by the side of the Weston canal, about 200 yards 
from the swing bridge, is a dislocation, at which the beds there 
apparently water-stone, dip E. by S. 80^. On the S. side of the 
Weaver, at the first hill on the Frodsham road, are contorted 
