588 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. 



but close to the turnpike gate they appear to dip north, or are nearly- 

 vertical, and shortly regain their dip to the south at 80°, but again 

 undulate and dip to the north as far as Oxgrove, where, on approach- 

 ing the red grits and sandstones, they are again bent and folded, 

 though not immediately in contact with them. These easterly ex- 

 tended Morte slates as clearly underlie the Dulverton or Pickvvell- 

 Down sandstone here as the same slates at Morte and Woolacombe 

 clearly and unmistakeably underlie the Pickwell-Down sandstone 

 in Morte Bay, hereafter to be described. 



Between Oxgrove and Lousy Gate two distinct undulations and 

 reversed dips take place in these Tipper Old Eed Sandstone beds. 

 Below, or south of, Oxgrove they dip south-south-west 65°, and are 

 thick-bedded, earthy, red, grey, and chocolate or purple gritty sand- 

 stones. Both roads were traversed from Exton to Dulverton, viz. 

 that following the course of the river Exe, and the Exton Hill, 

 Bromton Regis, and Lousy Gate road, and subsequently the courses 

 of the three rivers — the Barle, the Exe, and the stream west of 

 Haddon Down, — all with a view to determine if there existed any 

 evidence of a fault, or other movement of sufficient magnitude (said 

 to occur) to at all alter our reading and understanding the physical 

 structure of North Devon and West Somerset. Prom the latitude of 

 Morte Bay on the west to the southern part of the Quantock hills 

 on the east of the county, no such movement, due to either fault or 

 anticlinal, was I enabled to determine in all the traverses made. At 

 Oxgrove, as above stated, the Morte slates are seen in position below, 

 or underlying, the red Pickwell sandstones (third series)* (Upper 

 Old Eed Sandstone), which here dip south at 45°, but extensively 

 undulate before reaching Barham Down and Lousy Gate, where they 

 resume a steady dip south-west at 50°, and then pass under the con- 

 formable Upper Devonian, or Dulverton and Baggy slaty series to the 

 south. The transition from the thick-bedded, many-coloured, gritty 

 beds through the mottled micaceous softer grits and fissile marls 

 &c. south of Lousy Gate, to the yellow and brown Baggy slates 

 south of the town of Dulverton to Pixton Park, is complete, and 

 without any disturbance whatever. JSTo section can be clearer than 

 that of the upper or superimposed series ; nor is there a clearer or 

 better base than that aiForded by the Upper Old Eed Sandstone 

 (Upper Devonian) for the Lower Carboniferous rocks which lie to 

 the south of Dulverton, at Brushford and East Anstey &c. ; for 

 imediately south of the thick-bedded red sandstones and shales at 

 Lousy Gate, the fissile or slat}^ series set in, as at Yention, on the south 

 side of Morte Bay, and, after continuing red for some distance, fioally 

 alternate with the pale-brown and greenish-yellow slates of Dulver- 

 ton, where they are all of one character, again succeededby the Pixton- 

 Park (Marwood) and Brushford beds. It is clear, therefore, that 

 here the upward succession is complete, and that the Upper Old Eed 

 Sandstone of Pickwell &c. determines the top of the Middle or 

 Ilfracombe beds, and the base of the Upper Devonian series, the 



* 1st, or lowest, the Foreland Lower Sandstones. 2nd, the Hangman, or 

 Middle Sandstones. 3rd, the Pickwell-Down or Upper Sandstones. 



