LAMLASH. 'GEOLOGY. 433 



positions generally similar to those which it occupies in 

 the greater part of Arran, namely, very little deviating 

 from the horizontal plane. The most extensive range of 

 strata is found at the northern and lowest parts of the 

 island ; where their broken edges are visible in many 

 places, and particularly in that portion which faces the 

 town of Kilbride. Hence they extend round the base 

 of the mountain towards the southern extremity, for about 

 two-thirds of its length. The only other conspicuous mass 

 of this rock, lies on the east side, under the most elevated 

 and steepest part of the mountain ; since, although it is 

 to be seen in various places round the southern side of 

 the island, it no where else occupies any considerable 

 space without interruption. This portion extends con- 

 tinuously along the eastern shore for more than half a 

 mile, often presenting solid and uninterrupted faces of 150 

 feet or more in thickness. One part of it in particular 

 is remarkable ; forming a perpendicular cliff which over- 

 hangs so far as to admit of a passage behind the streams of 

 water that in wet seasons are continually dripping over 

 its high edge. Being uniformly curved, it reflects sound 

 in a remarkable manner ; producing those distinct echoes 

 that occur in works of art under similar circumstances. 



In the general details and mineral characters, this sand- 

 stone resembles so exactly that of Arran, as to render a 

 minute description unnecessary. 



On the western side of the island it is uniformly red. 

 The principal part of the mass on the east side, is of the 

 same colour ; but as the dip is here northerly, a lower set 

 of beds becomes exposed in proceeding towards the south, 

 of a white colour with a slight ochrey tinge. It will be 

 remembered that the same circumstance occurs on the 

 north-eastern shore of Arran ; the white sandstone to the 

 north of Sannox, being inferior in position to the red 

 which appears at the Cock. It was shown that the 

 former is interposed between two leading masses of the 

 latter ; and the same alternation probably exists in Lam- 



VOL. II. F F 



