Vol. 65.] THE CAULDRON-SUBSIDENCE OF GLEN COE. 



627 



fig. 2 will show how important is the influence that the cauldron - 

 subsidence has had upon the outcrops of the various belts of schist 

 found within it. 



Pig. 2. — Sketch-map of the Highland Schists of the Glen Coe district, showing 

 the effect of the boundary-fault on the distribution of the schists. 



Maine, Gneiss-zs [^:9v ' : .5, : - : \ Quartzile [?-, <+, &\PhyZL^s ' - - - 



Outside the fault, near the mouth of Glen Coe we can make out the 

 following local succession in descending order (as the beds lie) : — 

 4. Thick phyllites. 



3. Thick limestone and calcareous schists. 

 2. Thin black schist and phyllites. 

 1. Thick quartzite. 

 These rocks, for the most part, dip steeply south-westwards. 

 The same succession is thrown forward to the north-east in the 

 faulted area, to an extent which indicates a drop of some thousands 

 of feet. 



The thick phyllites (4) occupy the hill-slopes beneath the lava- 



