146 



HE. ALFRED HARKER ON THE CAEROCK FELL [May 1 895, 



curves are more distinctly separated, and the two iron oxides are 

 united as metallic iron. The Roman numerals in the diagram refer 

 to the chemical analyses given in the text, namely : — 



II. Iron-ore gabbro. 

 I. Normal quartz-gabbro. 

 III. Granophyre. 



The ' consanguinity ' of the several rocks is thus clearly brought 



Fig. 3. — Diagram showing the atomic ratios of tlie several constituents 

 in the rocks of the Carrock Fell district. 



out. The Skiddaw granite, as alreadv stated, probably belongs to 

 a quite distinct group of intrusions. This also is illustrated by the 

 diagram, which shows : — 



IV. Skiddaw granite. 

 V. Grrainsgill greisen. 



The similarity of the greisen to the granite is apparent, but to 

 bring them into connexion with the other group would require 



