362 Mr. Horner on the Geology of the 



of Triscombe the conglomerate appears, and may be traced to Bag- 

 borough and from thence the whole way to Bishop's Lydeard, where 

 sections of it are seen in the side of the road. 



§ 28. I have every reason to believe that nearly the whole of 

 the rich vale of Taunton Dean is formed of rocks of this descrip- 

 tion. Mr. De Luc* describes a " red marl with blue stripes" be- 

 tween Blackdown and Wellington, and in the neighbourhood of 

 Wiveliscombe he observed " at the summit of two eminences" a 

 conglomerate in all respects the same as the Popple Rock of Vellow, 

 which he afterwards examined. 



§ 29. Near the village of St. Michael the road is cut across a ridge, 

 and exposes a section of conglomerate and red sandstone to the depth 

 of 20 or 30 feet, and the same rocks are found in all the intervening 

 Tallies between the ridges of the grauwacke formation which extend 

 from Cothelstone Lodge in a south-easterly direction. The road 

 from Bridgwater to Nether Stowey crosses the extremities of some 

 of the lateral branches that extend from the Quantock hills, and 

 these are entirely composed of the derivative rocks. Near Coke- 

 hurst, at a place called Mount Radford, there are some large quar- 

 ries where a very hard conglomerate is worked. In composition 

 and alternation with sandstone it is very like the series at Lawford 

 farm, and like that contains green patches. It occurs in thick beds 

 which are inclined at an angle of 15". <iipping north by west. In 

 one of the quarries I observed a slip in the beds of about four feet, 

 and the sides of the slip were covered with a smooth coating of 

 oxide of iron similar to a slickenside. Within a mile of Stowey, 

 where the road turns off to Taunton, there is a sandstone which is 

 principally white, but is in some places variegated with red spots 

 and stripes, and containing some of those green patches so general 



* Geological Travels, Vol.3. §§ 1349. 1351, 



