1-48 CAEE0CK. FELL GEANOPHYEE AND GBAINSGILL GEEISEN. [May 1 89 5, 



the granite by vaporous exhalations or solutions acting outwards 

 from ordinary joint-planes. 



Prof. J. W. Judd, Mr. J. E. Maee, Mr. Geoege Baeeow, and 

 Mr. W. W. "Watts also spoke. 



The Atjthoe thanked the speakers for their reception of his paper, 

 and briefly replied to some of the questions raised. As regards the 

 age of the gabbro and granophyre, he had not been able to come to 

 any precise conclusion, but stratigraphical considerations indicated 

 that these rocks were intruded subsequently to the post-Silurian 

 crust-movements. The granite and greisen belonged to the epoch of 

 those crust-movements. The granophyre showed structural as well 

 as mineralogical modifications in the neighbourhood of the gabbro, 

 assuming in places a singularly coarse texture. The rock which he 

 had termed ' greisen ' certainly differed from the rocks so named in 

 Cornwall, and, in particular, it carried none of the special minerals 

 so characteristic of the latter. 



