ARRAN. GEOLOGY. SECONDARY STRATA. 377 



careous grit, and some varieties of quartzose conglo- 

 merates. The whole collective mass of beds here does not 

 perhaps amount to fifty feet in thickness ; but it remains 

 as a beacon to show that a succession of small alternating 



C3 



strata, similar to those before described, has also existed 

 in this place. Of their former extent, or of that which 

 may have followed them to a still greater altitude, there 

 is no ground to judge ; but every thing serves to mark 

 the destruction as well as the disturbance of the strata on 

 this side of Arran. 



It is now necessary to trace these stratified rocks from 

 -the great and lowermost mass, towards the south ; a 

 general idea having already been given of their directions, 

 and of their relations to that fundamental point. Proceed- 

 ing southwards from Scriden towards Sannox, different 

 alternations of red sandstone and conglomerate occur, suc- 

 ceeded at length by white sandstone. All these beds are 

 visible on the shore, and extend at the same time to a 

 great height in the hill. Their dip is, as already pointed 

 out, in the reverse order to those on the north side of 

 Scriden, and the variation in the quantity of that dip is 

 similar ; the beds appearing to bend, with their convexity 

 towards the hill, or the angle of inclination being greater 

 above than below. The order of their succession upwards 

 is equally evident; since the broken edges occur in the 

 progress southwards, precisely as they did before in the 

 progress northwards. 



At this point in the investigation of the .shore, it is 

 necessary to diverge into Glen Sannox, for the purpose 

 of pointing out some interesting circumstances with re- 

 spect to the sandstone, which are there visible. The 

 strata may be traced for a considerable space up the 

 valley, where they at length terminate in a succession 

 of conglomerate beds ; having, through the greater part 

 of this tract presented no appearances requiring parti- 

 cular attention. Near their termination, these become 

 eject, or at least highly elevated ; and th^ conglomerate 



