FLODDA. GEOLOGY. 261 



since in Sky and the neighbouring islands it occurs 

 in this manner. It is of a fine and smooth texture, 

 sometimes not to be distinguished from clay slate, except 

 by the rare scales of mica which are found at the 

 separation of the laminae. There is nothing in the 

 character of the red sandstone so different from that 

 of Rasay as to require notice. The alternation of those 

 two rocks where they occur in these islands, and their 

 regular sequence in this, show that, in a geological view, 

 they are both parts of the same series. 



