ETHEEIDGE — DETOXIAX HOCKS AXD FOSSILS. 609 



fault to the north occurs, or a reversed anticlinal to the north, 

 which, as before stated, -would (according to his views) place the Lyn- 

 ton beds on the same general horizon -with those of I3ag-gy Point and 

 Mar wood, south of the Pick well-Down Sandstone, although he ad- 

 mits that all appearances are to the contrary. There is no proof 

 that the igneous rock at Bittadon is eruptive — nothing to prove that 

 it is not a contemporaneously bedded porphyr}-, and the same as that 

 occurring at Garmond Down and Smithia Park, before mentioned, 

 though diifering lithologically. It occurs immediately south of Eit- 

 tadon, in a romantic dell west of Huish Down, immediately east of 

 the main road from Ilfracombe to Pilton, and is at the top and 

 near the junction of the grey Morte slates with the succeeding 

 Upper Old Pted Sandstone ; a quarter of a mile north of Bittadon 

 these slates dip 43° south, here 30° south ; and immediately south, in 

 the red sandstones at Swinham Down, the dip is south also. The 

 road-sections show local undulations and reversed dips in the sand- 

 stones ; there are scores of such undulations producing anticlinal 

 and synclinal folds on both a large and a small scale across the whole 

 of the Lower, Middle, and Upper Devonian slates and sandstones, 

 from the north coast at Lynton to the Culm-measures on the south 

 at Coddon Hill &c. Here, as at all points along the strike and 

 junction of the Middle argillaceous group with the Upper Sandstone, 

 there is no evidence whatever of reversion of dip, or fault, or anti- 

 clinal, in the sense in which it should be understood as existing 

 along a line or axis of great and extended disturbance ; and, more- 

 over, on the question of identity or even similarity of the rock- 

 masses of the two areas under discussion which this belt of sand- 

 stones divides, i. e. the Baggy, Croyde and Marwood area on the 

 south, and the Ilfracombe and Lynton areas on the north, they are 

 to me physically and pal?eontologically so different, both in great 

 features and in detail, that it cannot be wondered that the older and 

 able geologists who have examined the Xorth Devon and West So- 

 merset groups of rocks should have assigned to them the position, 

 order, and succession they did, however difficult it might have been 

 to have correlated them with the perhaps contemporaneous, or syn- 

 chronously deposited. Lower, Middle, or Upper Old Red Sandstone of 

 other areas : to me these red, green, white, and grey Upper Old lied 

 Sandstones that stretch from the sea to the Quantock Hills are the 

 natural physical and palaeontological base of the well-defined and 

 to them conformable fossiliferous Upper marine Devonian beds of 

 Baggy, Marwood, and Croyde etc., which are in their turn succeeded 

 by .the Carboniferous Slates and Coomhola (?) Grits of Braunton, 

 Barnstaple, etc., themselves covered by the equivalents of the Carboni- 

 ferous Limestone at Yen, Swirabridge ttc, and again by the higher 

 Millstone -giit of Coddon Hill. The succession, position, structure, 

 fossil character, &c., of the group of rocks in this traverse, between 

 Ilfracombe and Pilton, showed and proved to me that the Middle 

 and Upper Devonian series underlie conformably, without a break, 

 the Lower Carboniferous or Carbonaceous beds to the south of 

 Pilton and Barnstaple. 



VOL. XXTTI. rAET I. 2 T 



