418 



PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY. 



POSTPONED PAPER. 



Notes on the Geology of the Yalleys of the Upper Paet of the Eiver 

 Teign and its Feeders. By G. Waeeing Gemerod, Esq., M.A., 



E.G.S. 



(Eead February 20, 1867*.) 

 [Abridged.] 



A MEMOIR on " The Bovey deposit," by J. H. Key, Esq., was read 

 before the Geological Society of London, on November 20th, 1861t ; 

 and a memoir " On the Lignite and Clays of Bovey Tracey, Devon- 

 shire," by W. Pengelly, Esq., vras read before the Royal Society 

 November 21st, 1861:|:- The district noticed in the following pages 

 consists of the portions of the valleys of the River Teign and its 

 feeders, that lie north of that described in these papers. 



The Teign is formed for the most part by the North and South 

 Teigns, the Walla Brook, Easter Brook, and Bovey River. 



The South Teign rises near Eernworthy, about 1400 feet above 

 the sea level §, and joins the North Teign at Leigh Bridge. 



The North Teign rises on Dartmoor, about 1600 feet above the sea- 

 level, near the upper end of a valley that is crossed at its western 

 extremity by the East Dart ; and near the Tolmen, 1192 feet above 

 the sea, it receives the WaUa Brook, which brings the drainage of 

 an extensive granitic district to the north. Both these streams, near 

 and at their junction, run in artificial courses, walled at the side 

 with blocks of granite, and cut through a rising bank, the diversion 

 having probably been made by tin-streamers to drain the broad level 

 that occupies a hollow of the hills at this point. Erom this place 

 the North Teign runs in a narrow gorge to a level in an opening of 

 the hills at Gidley Park, where it receives the Blackatton Water, 

 which brings the drainage of a district containing, in the distant 

 part near Throwleigh, the edge of the Carboniferous beds ; but no 



* For the other communications read at this Evening-meeting see p. 176. 

 t Quart. Journ. G-eol. Soc. vol. xviii. p. 9. 

 + Phil. Trans. 1862, p. 1019. 



§ The elevations, except when otherwise stated, are from barometrical mea- 

 surements taken by myself, and must be regarded as merely approximate. 



