Part of Gloucestershire and Somersetshire. SHS 



allowances for undulations and inequalities in the respective masses^ and may 

 presume that they are continuous^ it seems probable that 



No. 1, trap of Micklewood^ corresponds to that of Woodford-green. 



2. . . .to that of Horsley and the trap adjoining the 



Lower Mill. 



3. . . .to that situate west of Middle Mill ; but 



No. 4. trap is not traceable, in the valley to the north, beyond the spot where 

 it appears by the river side. 



Before I leave the right bank of the Avon, I must notice an inflection which 

 occurs in the stratified beds near the southern cottage above the Iron mill, 

 and apparently in the vicinity of the north-eastern side of the 4th trap, yet not 

 in contact with it. The beds are here exposed, for a space of about 12 feet 

 in length and 5 feet in breadth, and form an arched curve, broken off on the 

 south-west, but inclined on the north-eastern side of the arch at an angle of 

 35°. Here then is a convex inflection, while that observed on the eastern 

 side of the Woodford trap was concave (§ 11.). But these appearances, aris- 

 ing from subordinate undulations on the small scale, are not confined to the 

 vicinity of trap ; and in the brow to the north, the beds observe the general 

 dip, south 30° west, at an angle of S6°. 



§ 13. The mutual relations of the stratified transition beds and the trap 

 may be distinctly traced also at Charfield-green, on the left bank of the Avon. 

 They form there a gentle eminence, in which alone they can be examined ; 

 for toward the north-east and south, the overlying new red marl and lias for- 

 mations, and the diluvial depositions, prevent further research. 



This eminence is occupied, 



1. By stratified beds, from the bridge to the eastern 



trap, being . .... 110 fathoms wide. 



' 2. Eastern trap 40 



3. Stratified beds 200 



4. Western trap 40 



and then stratified beds again, extending toward the escarpment on the west. 

 That the trap is here interposed in beds parallel to the stratified rocks, is 

 shown by the fact that, in all cases admitting of observation, the latter are 

 found dipping 20° to 32° to the west, 10° south, close to the eastern sides of the 

 two bodies of trap ; while on their western sides they preserve the same dip. 

 These stratified beds consist of sandstone, in beds varying from 2 or 3 to 6 or 

 8 inches in thickness, and alternating with layers of reddish and greenish clay, 

 blueish and greenish white marl, and thin beds of limestone ; the sandstone 



i 



