vol. 60.] rocks of the borrowdale volcanic series. 105 



Discussion. 



Mr. Harker said that to listen to this paper made one regret 

 more keenly that the Author had not been spared to continue the 

 ■work so well began. The remarkable relations described in the 

 paper between intimately-associated basic and acid intrusions had 

 escaped his (the speaker's) notice when working with Mr. Marr in 

 the Lake District ; but they found a parallel, even in some of the 

 minor details, among the Tertiary intrusions of the Inner Hebrides. 



The origin of the garnets, so striking a feature of the Lake- 

 District rocks as a whole, was an important question, upon which 

 the Author's researches would undoubtedly throw light. The 

 uneven distribution of the mineral pointed to a metamorphic origin, 

 and the detailed nature of the distribution was such as to connect 

 the garnets with metamorphism of the dynamic kind. 



Prof. Sollas said that he joined in the previous speaker's 

 expression of regret at the premature loss to science of so gifted an 

 observer as the Author. Much subjectivity attached to the various 

 interpretations of the mixtures of igneous rocks. In reality 

 different explanations could account for similar phenomena, and the 

 supposed simultaneous fluidity of basic and acid rocks was by no 

 means indispensable to explain the facts. Further, the igneous 

 magmas were already differentiated before they were erupted at the 

 surface of the earth. 



Mr. Barrow remarked that Mr. Maynard Hutchings (who was 

 unfortunately not present) had worked at these very Lake-District 

 rocks some time ago. Mr. Hutchings had no doubts as to the meta- 

 morphic origin of the garnets in the ashes, although he did not 

 feel sure that he could account for it. 



