ORMEEOD VALLEY OF THE TEIGN. 429 



including the present opening at Hunt's Tor) is 789 feet above 

 the sea-level, and is on the Carboniferous rocks to the south-west 

 of Drewsteignton, where no traces of granite boulders exist. The 

 ground gradually falls from Dartmoor to this place, and then, rising 

 rapidly, forms the hills at Piddleton (869 feet) to the east of 

 Hunt's Tor, Cranbrook Castle (1110 feet), and the range extending 

 by the east of Moreton to the Wray Erook. The height of the ridge 

 dividing the watersheds near Moreton at the easterly end, as taken 

 by the barometer, is 722 feet, and at the westerly end, as shown by 

 the levels of the Chagford Extension Eailway, is 719 feet above the 

 sea-level ; and until the opening of the gorge by Hunt's Tor, the over- 

 flow from the hollow, now Chagford Valley, would have passed down 

 Wray Brook to Bovey Tracey. Mr. Pengelly remarks* that the clays 

 and sands of the Bovey deposit were carried from Dartmoor by currents 

 from between west and north-west ; a stream passing in the way 

 now suggested would be in accordance with that opinion. But had 

 the valley been open between Hunt's Tor a.nd Clifford Bridge a 

 northerly stream would have flowed into the hollow noAV containing 

 the Bovey beds ; and Mr. Pengelly shows that such a current did not 

 exist until the deposition of "The Head;" and between the true Bovey 

 deposit and that bed a great chronological interval occurs, 



^- Phil. Trans. 1862, p. 1080. 



2 g2 



