﻿Pig. 9. — SketcJi-maj) showing the strike and dip of the axial planes 

 of the secondary folds and of the sirain-slip cleavage in Colonsay 

 and Oronsay, on the sccde of 2 miles to an inch. 



^ ^ ft- ,i^ // / Str'iks cf axial plzms y 



J / yJ'-y^??<-J^*^ — ^/ "'P oi axial plcuiez 4. 



"'' '' ' "' ^......^.s^yT^^^ Axial plarns vsrticcd ^ 



[The broken lines indicate the strike, and the arrows indicate the direction of 

 dip of the axial planes. The dip is in general steep, especially in the areas 

 of constant strike ; but, where the strike is irregular, the dip is sometimes 

 very low.] 



