360 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 7, 



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8. Aspect of the Country. — In tra- 

 versing the country between Morte- 

 hoe and Lee Bay, I was again struck 

 with the exact similarity of the form 

 of ground and nature of scenery to 

 that so frequent in the Carboniferous 

 Slate country of county Cork. The 

 general surface of the high ground is 

 uniform and monotonous, but it is 

 cut into such numerous little dells, 

 opening out into deeper ravines, and 

 these into steep-sided, flat-bottomed 

 valleys, that it becomes picturesque 

 and beautiful. The tops of the hills, 

 too, left standing between the ravines 

 and valleys, are varied by frequent 

 little brows and ridges of slate, form- 

 ing small, parallel, escarped terraces, 

 and rocky crags, and furze -covered 

 knolls, while the colour and nature 

 of the soil, and all the minuter fea- 

 tures of the scenery are identical in 

 both countries. 



I was hastily summoned from II- 

 fracombe, on private business, before 

 I could examine the calcareous bands 

 and other rocks of Combe-Martin and 

 its neighbourhood. If, however, the 

 Lynton rocks below, and the Ilfra- 

 combe and Mortehoe rocks above be 

 determined, the intermediate Combe- 

 Martin beds follow as a matter of 

 course. 



9. Probable Existence of a Great 

 East and West Fault with Downthrow 

 to tlie Northivard. — Having now laid 

 before the Society the means I have 

 had of examining the rocks and form- 

 ing an opinion upon them, I have to 

 state my deliberate judgment that 

 the rocks of Lynton, Ilfracombe, and 

 Mortehoe are part of the same group 

 of rocks as those called the Carboni- 

 ferous Slate in Ireland, and that the 

 rocks which strike from Pickwell 

 Down, through Swinham Down, Gar- 

 monds Down, Span Head (of the Ord- 

 nance map), and Dulverton Common, 

 to Haddon Down, are the upper part 

 of the Old Red Sandstone of Ireland ; 



