Fig. 
Fig. 
Fig. 
Fig. 
Note. 
195 
3. Section, shewing the position of the strata between Forcegarth Hill and the bed 
of the river below High Force. (1.) Trap. (2.) Hard sandstone and slate-clay. 
(3.) Thin beds of dark blue encrinite limestone. 
4, Section transverse to the course of the Tees, a mile below Caldron Snout. 
(1.) Beds of the general section above the Whin-Sill. (2.) A great irregular, 
bed of trap, about 200 feet thick, supposed to represent the Whin-Sill (General 
Section, No. 71.) (3.) Beds of limestone, sandstone, and slate-clay. 
5. Section, commencing immediately below Caldron Snout, and exhibiting the 
relation of the trap to the inferior strata on the left bank of the Tees. (1.) Trap. 
(2.) Beds of limestone, sandstone, and slate-clay. 
PLATE X. 
. 1. Junction of the trap with the inferior strata, about 200 yards below Caldron 
Snout. The length of the exposed beds, is about 40 feet. (1). Trap. (2.) In- 
durated slate-clay. (3.) Granular limestone. (4.) Indurated slate-clay. (5.) Gra- 
nular limestone. 
2. A section exposing the junction of the trap with the inferior strata at White 
Force. (1.) Trap. The escarpment, in some places, not less than sixty or eighty 
feet. (2.) Granular limestone. (3.) A bed of highly indurated shale. (4.) Gra- 
nular limestone. The face of this rock appears to be, in some places, nearly 
forty feet. Large wedge-shaped masses of trap are interposed between 
Nos. 2, 3, and 4. 
It will be seen by a reference to the Map (PI. vit.) that the preceding sections are 
not constructed upon any regular scale. The only wish of the Author was, to convey, 
by their help, a correct notion of certain geological facts, and to make the descriptions 
in the text intelligible. 
BB2 
