516 



ON THE ROCKS OF THE MAEYERN HUES. 



rocks appears to be restricted to bands. He referred to a diagram 

 in a recent publication by Mr. Mellard Eeade, "which proves that 

 flexure cannot take place without great trituration of the inter- 

 vening mass, and he considered that such a cause had produced a 

 certain amount of foliation. He commented on the opposite views 

 expressed by Drs. Hicks and Callaway with reference to the 

 alleged conversion of felsitic rocks into mica-schists. A case parallel 

 to one of the instances of foliation mentioned by Dr. Callaway may 

 be met with on the west of Dartmoor. 



Dr. Caxeawat, in reply, congratulated himself on having had the 

 support of Mr. Teall. Eeptying to Dr. Hicks's remarks, he held that 

 there was a true passage between felsite and mica-schist ; but this 

 was a matter of field-observation, and could not be decided in that 

 room. He did not see how a succession could be made out of 

 hypogene igneous rocks. How the localization of pressure was 

 effected he could not tell. There is a foliation, whether local or 

 general. The section queried by Mr. Eutley is half a mile north 

 of the Wych. 



