348 Prof. Hughes, On the altered rocks of Anglesea. [Feb. 28, 



suggesting volcanic material at hand. In the gnarled series itself 

 we see an immense thickness of tolerably uniform felspathic shales 

 and slates with coarser lines, just such material as would be 

 formed by the settling down of volcanic ash in water. The beds 

 are mostly obscured by crumpling, but if we select the uncrumpled 

 portions we shall find only layers of gritty and finer felspathic 

 matter showing all the characters of an ordinary sedimentary 

 deposit. Having once observed this we can almost always follow 

 it into the crumpled and gnarled portions until obliterated by vein 

 structure. Some beds identical in every respect occur on Snowdon, 

 and in the rocks referred to the Green Slates and Porphyry S. of 

 Ulswater there are schists quite as much altered as anything in the 

 gnarled series of Anglesea. The Green Slates and Porphyry re- 

 present the Bala volcanic series and closely resemble the same beds 

 in N". Wales. But in Chapel-le-Dale about 20 miles S.E. from Shap 

 we find in the corresponding position nothing but sedimentary 

 deposits over 10,000 feet in thickness, showing however in their 

 material and arrangement, a sorting of volcanic felspathic 

 debris by water. Not a trace of life has as yet been detected 

 in all this great mass of sediment more than two miles in thick- 

 ness. The absence of fossils therefore in the still more un- 

 promising-looking schists of Anglesea need not strike us as a 

 difficulty in the correlation proposed — viz. that we have in the 

 gnarled schists of Anglesea, the equivalents in time of part of the 

 Bala volcanic series, deposited beyond the principal region of 

 volcanic activity and that the alteration which has taken place in 

 them is to be referred to the crumpling of a laminated rock, and 

 a kind of indigenous vein structure following the intense crushing 

 and not to foliation or the segregation in layers of the different 

 component minerals, under any influence such as is usually under- 

 stood by true metamorphism. 



(3) Mr W. W. CORDEAUX exhibited some antlers of the 

 fallow deer (Cervus dama), stated to have been recently found at 

 Newnhara. A discussion took place as to the probability of the 

 antlers having been found in the stratum from which the workmen 

 said they had procured them. 



