428 DE RANGE : BORINGS FOR WATER AND SALT IN COUNTY YORK. 
east coast. The overlaying Marl Slate of the Durham coast is rep- 
resented in Yorkshire, by the fossiliferous laminated beds of Garforth. 
The Lower Limestone contains of carbonate of magnesia 457, while 
the Upper Limestone only contains about 4 per cent, of magnesia. 
Over this bed are the Knottingley red and pale laminated clays, 
which would appear to be on the horizon of the Marls associated 
with the slightly Magnesian Limestone of the ^lanchester area. 
Magnesian 
Limestone. 
Triassic. 
River Tees, south bank . . 
nil 
74 square miles 
„ Esk 
nil 
nil 
,, Foulness 
nil 
„ Derwent 
nil 
V 
>> 
Ouse... 
50 
500 
,, Aire and C alder 
44 
96 
Don ... 
55 
120 
149 
862 
In the Tees basin, it is worthy of note that the first discovery 
of Rock-salt was accidentally made in a boring for water, carried out 
by Messrs. Mather and Piatt, for Messrs. Bolckow, Vaughan and 
Company, commenced in July, 1859, and finished in August, 1863. 
This boring is now part of the undertaking of the Cleveland Salt 
Company. The following Table gives an abstract of the information 
that has been obtained by boring for Salt between this boring and 
the most recent bore-hole at Lackenby, completed in November of 
last year, and also carried out by Messrs Mather and Piatt : — 
N. 
Ormesbj. 
Middlesbro* 
B., V.&Co. 
Imperial 
Ironworks. 
1 
S. Bank 
Eston. 
Lackenby. 
ft. 
in. 
ft. 
in. 
ft. 
in. ■ 
ft. 
in. 
ft. 
in. 
Surface Deposits 
34 
0 
70 
0 
66 
6 
41 
0 
13 
0 
Upper Gypsum Marls . 
242 
0 
86 
0 
149 
10 
453 
0 
584 
0 
Red Sandstone ana Marls 
859 
6 
902 
6 
1117 
2' 
836 
6 
598 
0 
Lower Gypsum Marls ... 
182 
9 
132 
8 
203 
^1 
200 
0 
448 
0 
Anhydrite and Salt Beds 
121 
3 
114 
10 
155 
3, 
148 
8i 
142 
9 
Magnesian Limestone . . . 
7 
4 
