60 



ME. A. HARKER OK THE GEOLOGICAL [Feb. 1906, 



than now : the reverse is more probable. 



a, 



^Ld 



The white sandstones of 

 the Oolites on Eigg 



. itself are below the 

 level of this breccia. 

 In the cliffs cf Eaasay 

 and the north of Skye 

 they rise higher ; but 

 these places are 25 or 

 30 miles distant, and 

 the abundance of the 

 sandstone - fragments 

 in the breccia, of 

 which they compose 

 at certain spots the 

 chief element, remains 

 unexplained. Of the 

 red Torridonian rocks 

 there are at the pre- 

 sent day extensive 

 exposures at altitudes 

 higher than the base 

 of the Sgurr ; but the 

 nearest is 12 miles 

 distant, on Rum, and 

 we can scarcely sup- 

 pose angular blocks 

 measuring up to 3 or 

 4 feet in diameter to 

 have travelled so far. 

 Prof. Judd l has re- 

 marked that 



' the characters of the 

 buried conglomerate are 

 suggestive of a mountain- 

 ravine subject to the 

 passage of violent floods 

 rather than of an ordi- 

 nary river-channel.' 



To the present writer 

 it seems to resemble 

 more closely a vol- 

 canic agglomerate, 

 partly rearranged by 

 water-action. 



In the volcanic 

 agglomerates of the 

 Inner Hebrides it is 

 a common experience 

 to find, mingled with the basaltic material, fragments of pre- 



1 Quart. Journ. Geol. Soc. vol. xxx (1874) p. 267. 



