584 



PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. 



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Stockland, Bristol (the upper New 

 Eed Sandstone), covers still higher 

 sandstones resembling the Morte-Bay 

 and Pickwell-Down beds, I am not 

 justified in asserting, though I see 

 no reason why it should not occur. 

 Similar arguments may be used re- 

 lative to the connexion of the western 

 side of the Quantock Hills with the 

 eastern portion of the Exmoor range 

 at Croydon and Brendon Hills, which 

 are separated by the narrow valley, 

 composed of the Lower New Red Sand- 

 stone and Dolomitic Conglomerates 

 of considerable thickness, which 

 extends to Carhampton, Dunster, 

 "Watchet, and Minehead, but which 

 is separated from the deep valley of 

 Luckham and Porlock by an isthmus 

 of Old Sed Sandstone connecting 

 Croydon Hill and Dunster Park with 

 Grabbist Hill and North Hill over 

 Minehead. These two valleys, con- 

 tinuous in direction, though discon- 

 nected at Higher Kitswell, appear to 

 occupy the line of a great fault, or 

 they are in a trough or synclinal 

 basin ; the Great St.-Decumans and 

 parallel faults at Watchet, Quan- 

 tock Head, and Little Stoke, which 

 extend for fourteen miles, are trace- 

 able by the depression of the Porlock 

 valley and the reversed dips of the 

 rocks into it. This line also corre- 

 sponds with the anticlinal of the valley 

 of the East Lynn, south of the 

 Foreland, and the high coast-land 

 from Porlock, the beds comprising 

 the structure of which all dip con- 

 tinuously north (north of the anticli- 

 nal from 20° to 40°) to Culbone, Glen- 

 thorne, and on to Porlock, thence 

 through North Hill to Minehead, 

 south of the anticlinal, or the gorge 

 of the East Lynn, from Lynton to 

 Lucott Hill, Stoke Pero, and Timbers- 

 combe, south-feast of Dunster. The 

 grits, sandstones, slates, and lime- 

 stones of the whole of North Devon 

 and West Somerset have one uni- 



