1869.] ORilEEOD — DARTMOOR GRANITE. 273 



they at present exist. The ancient rivers had no doubt run at far 

 higher levels than at present. Even the watersheds afford no gauge 

 of the ancient bounds of the rivers. 



Mr. Evans stated his belief that the gravels on the plateau between 

 the Little Ouse and the Wissey belonged to the Glacial series. He 

 could not agree with the author in limiting the occurrence of the 

 implements to the base of the beds, in ignoring the eroding power 

 of rivers, or in regarding the deposits at Lakenheath and Yaudri- 

 court as remote from all possible river-action. He maintained that 

 the whole of the phenomena were in accordance with the excavation 

 of the valley, since the highest beds with implements had been de- 

 posited near Brandon, and pointed out that a large part of the great 

 plain of the Pens had probably been formed principally by tidal 

 action, since the deposit of the gravel-beds at Shrub Hill. 



Mr. Searles Wood regarded the valleys of the district under con- 

 sideration as not formed by river-action, but by tidal action during 

 emergence of the land. He regarded the higher gravels mentioned 

 as not of river origin, and dissented from the hypothesis of the 

 rivers of the south of England having formerly run at very high 

 levels. 



Mr. Flower, in reply, could not accept the belief that the process 

 of the manufacture of these implements could have been carried on 

 during the very lengthened period supposed by Mr. Evans, as, if so, 

 other traces of the men who formed them would have come to 

 light. He thought the French theory of diluvial action was more 

 in accordance with the phenomena than that of fluviatile transport. 



May 12, 1869. 



Francis Henry Brown, Esq., of BishweU, near Swansea; Samuel 

 Jenkins, Esq., 13 Clement's Inn Passage; Lieut. "Walter Haweis 

 James, R.E., Brompton Barracks, Chatham ; Charles Lambert, Esq., 

 3 Queen Street Place; Gordon Broome, Esq., Eoyal School of ^tines, 

 and Thomas William Gardner, Assoc. Inst. C.E., 10 St. Augustine's 

 Square, Camden Eoad, N.W., were elected Fellows of the Society. 



The following communications were read : — 



1. On some of the Results arising from the Beddln^g, Joints, and 

 Spheroidal Structure of the Granite on the Eastern Side of 

 Dartmoor, Devonshire*. By G. Wareing Ormerod, Esq., M.A., 

 F.G.S. 



The following pages will be confined to observations on some of the 

 effects which bedding, perpendicular joints, and spheroidal struc- 

 ture have produced in the physical features of Dartmoor. In the 

 report on the geology of Cornwall, Devon, and West Somerset, Sii' 

 Henry de la Beche states (page 157) " that the granite of Dartmoor 



* The district described in this paper is included in the Map published in 

 the Quarterly Journal of the Geological Society, vol. xxiii. p. 418. 



