SKY. GEOLOGY. SECONDARY STRATA. 327 



described hereafter. The trap veins that occur in this 

 district must also be referred to a future part of the 

 description. 



I shall now proceed to examine the remainder of this 

 limestone as it occurs along the shore from Loch Eishort 

 to Kilbride ; where a more distinct sequence of the most 

 interesting parts will be found, and where the solution of 

 the preceding difficulties will be more apparent.* 



In Loch Eishort it is first visible near the farm of Bor- 

 rereg, but under a very irregular form. There is here an 

 interval filled in the usual way with soil and rubbish, 

 that prevents its contact with the sandstone from being 

 discovered, and it is possible that in this interval the 

 conglomerate, which might be expected to separate these 

 two rocks, exists. Like some of those already mentioned 

 in Strath, it is disposed in thick naked protruding beds 

 without the laminar structure, and is destitute of organic 

 remains. The texture is also crystalline, and it has the 

 peculiar cavernous surface by which the unstratified lime- 

 stone is almost invariably distinguished. The direction 

 of this mass is much more northerly than that of the 

 surrounding rocks, as is more clearly indicated in the 

 map. The portion now described is but of small extent, 

 and is immediately followed by a similarly narrow and 

 parallel stripe of white quartz rock resembling that of 

 the opposite coast, which is again succeeded by another 

 portion of limestone similar to the former; after which 

 the ordinary stratified limestone immediately commences, 

 to undergo no changes of any moment till we pass the 

 point of Swishnish and thus, advancing upwards in the 

 order of the beds, draw nearer to Kilbride. Immediately 

 after the calcareous strata appear they are found alter- 

 nating with the brown calcareous sandstone and the shale 

 already described, containing the same shells and placed 

 at the same low angles of five or ten degrees. The 



* PI. XIV. fig. 2. 



