'0 MR. E. E. WALKER OX THE GARXET-BEARING [Feb. 1904, 



J^otes on the Garxet-bearjxg and Associated Rocks of the 

 Borrowdale Volcanic Series. By the late Edward Eaton 

 Walker, B.A., B.Sc, Scholar of Trinity College, Cambridge, 

 Geologist to the British East-Africa Protectorate. (Commu- 

 nicated by J. E. Mark, Esq., M.A., F.R.S., F.G.8. Read 

 December2nd, 1903.) l 



[Plates XIII & XIV — Microscope-Sections.] 



Table of Contexts. 



Page 



I. The Intrusive Complex of Blea Crag, Langstrath 70 



II. Intrusions in the Bow-Fell District 76 



III. Basic Offshoots from the Eskdale Granite 79 



IV. The Intrusive Complex of Burtness Combe, Buttermere 83 



V. Other Garnetiferous Intrusions in the Lake District 85 



VI. Garnetiferous Bocks in the Falcon-Crag Andesite-Group 86 



VII. The « Streaky ' Bocks of the Central Mountain-District 89 



VIII. The ' Streaky ' Bocks of the Haweswater District 98 



IX. The Characters of the Garnets 101 



X. Metamorphism of the Volcanic Bocks 102 



I. The Intrusive Complex of Blea Crag, Laxgstrath. 



Durixg the past year I have spent the greater part of my vacations 

 in the study of the garnet-bearing rocks associated with the 

 Borrowdale Volcanic Series. Being unable to proceed further with 

 this work, I venture to put forward the results of my observations, 

 in the hope that they may be of use to those who continue the 

 study of these rocks. I should like, at the outset, to say how 

 greatly indebted I am to Mr. Marr for all the help that he has given 

 me ; he has not only placed at my disposal his own maps of the 

 area and the details of his own observations, but has always been 

 ready with encouragement and advice. My thanks are also due to 

 Mr. Harker for the kind help and advice that he has given me 

 during the progress of the work. 



1 [The manuscript of this paper was placed in my hands by Mr. Walker when 

 he left for Africa eai'ly in 1902, the work having been largely done in 1901. I 

 was requested to keep the MS. and not to communicate it to the Society, 

 unless it was certain that the Author could not continue the work, for he had 

 hoped, on his return to England, to prosecute his researches among these rocks, 

 especially by completing the chemical analyses, which were only partially 

 carried out. His sad death, occurring but a year after he went out, has 

 deprived our science of a most promising student, of whom his friends ex- 

 pected great things, and I feel that the paper, which I now have the honour of 

 communicating to the Society, furnishes no mean evidence of Walker's powers. 

 Although the work is incomplete, it will certainly be of great value to 

 those interested in Lake-District geology, and also to students of the remark- 

 able and exceptional type of rock which is therein described. — J. E. M., 

 October 1903.] 



