384 



Mr Hill, On the relative age 



[May 14, 



rdk 



Calculated. 

 A 



o / 

 35 8-5 

 34 23-84 



69 32-16 



58 24-7 



L ?(104) 59 54 

 60 2-9 



sk 

 dk 



47 56 

 60 24-7 

 98 5-7 

 69 9 

 7515-4 



9 s 

 9 s , 



70 5-7 

 53 42 



Miller. 



Calculated. 



53 34 



rc<f> 



od 

 r os 



oi 



'11, 

 vw 

 aw 

 Nw 



hh, 



r mk 



La-.c 



x t h 

 sh 



7l46-7c 

 44 55-7c 

 68 52 



73 58-4 

 80 55 



1149 



42 37 

 137 23 

 32 34 

 4153 

 58 5 

 38 53-4 



97 30-85 

 58 2-4 

 24 26 



36 35'5 

 64 9-6 



28 25-67 



(3) On Ansteds assertion, that the oldest rocks of Guernsey 

 are to be found in the northern part of the island. By Rev. E. 

 Hill, M.A., F.G.S., Fellow and Tutor of St John's College. 



Professor Ansted in his admirable monograph on the Channel 

 Islands while describing generally the geology of Guernsey men- 

 tions incidentally that the oldest rocks of the island are to be 

 found in the northern portion. He must have had ample oppor- 

 tunities for observing, as he tells us that he resided there four 

 years. Being a trained and practised observer, there could be no 

 reason beforehand to doubt the accuracy of his statement, and 

 he has been followed by subsequent writers. As however in 

 making this assertion he gives none of the evidence on which it 

 is based, and as the statement has been repeated in a paper 

 published in the proceedings of this Society, I think it may be 

 well to put on record such evidence bearing on the question as 

 in the course of several visits I have been able to collect. 



The southern table-land of Guernsey consists, as the earliest 

 observers noticed, of a mass of gneiss. This gneiss is extremely 

 coarse, in some parts even more coarse I believe than that of 

 Anglesey or the Hebrides, and to be matched only at Malvern, if 

 at all. These rocks are the oldest in their sevei'al localities, and 



