Relations of the Secondary Strata in the Me of Arran. S\ 



limestone. The first example of this is seen near a small cascade, where the 

 limestone beds containing the Productae are partially exposed. Again, nearly 

 one mile further south, a most enormous throw has brought up the same lime- 

 stone high in the face of the hill, and upwards of half a mile from the shore. 

 The following is a section in ascending order of the beds exposed at this 

 quarry. - 



Feet. 



1. Or lowest beds, in number eight or nine, of compact bluish limestone . . 5 



2. Three thin beds alternating with shale, and charged with Producta\ , 



Scotica ( ^2 



3. Shale and limestone with fossils 1 



4. Strong bed of limestone, surmounted by several bands of red shale .... 12 



5. Red cellular limestone — magnesian 2 



6. Strong micaceous reddish sandstone, — dip, S.S.E. 43° 10 



About.. 32 



The higher part of this quarry is traversed by a dyke of whinstone. 



From this point, in looking to the south, the carboniferous series is seen 

 rising high above the limestone, even to the summit of the round-topped hill 

 called Meal Doun, at least one thousand feet above the tidal level. The lowest 

 part of the series is chiefly composed of white sandstone; and in the escarp- 

 ment of the hill, coal and shale plants are found. The summit consists of bluish 

 gray and reddish gritty flagstone of the coal-measures (resembling the Pen- 

 nant grit of Bristol) ; and these beds dipping rapidly to the S.S.E. are brought 

 down to the shore north of Brodick Wood, where they are extensively worked. 

 On the norlh-western side, the summit and escarpment of Meal Doun are cut 

 through by a trap dyke about eight yards wide, running nearly north and south. 

 Few beds are visible on the shore along the line of these great faults, the coast 

 being generally covered with very numerous boulders of the granite of Goat 

 Fell, some of which are of enormous size. Nearer to the village of Brodick, 

 the beds on the beach and in a low cliff" indicate much disturbance; whilst 

 another great fault carries down the strata to less than half the elevation they 

 had attained in Meal Doun, the dip being changed to S.E. by S. and the angle 

 increased to 70° : the course of these beds is traceable tlirough Brodick Wood 

 by the west side of the castle to the inn. Beyond the village of Brodick the 

 same system of calcareous beds is apparently cut off" by a wide denudation, in 

 which is a rich alluvial tract forming the centre of the bay, but they reappear 

 in order on the side of the new road leading to Shiskin, and occupy a conspi- 

 cuous hill bounding the plain of Brodick on the west, and separating Glen 

 Shiragh from Glen Leug. The old red sandstone reappears in Glen Shiragh 

 below the above beds, dipping conformably, and at the same high angle of 70° : 



