326 SKY. GEOLOGY. SECONDARY STRATA, 



among such beds is not uncommon. It consists in general 

 of fragments of different coloured limestones united by 

 a calcareous cement ; but in a few places, as towards 

 Broadford, where it is found in the same line dispersedly, 

 it also contains fragments of quartz. It is probably 

 situated between the sandstone and the limestone, this- 

 being its natural place ; while its partial occurrence may 

 partly arise from obscurities produced by the ground, 

 and partly from its occasional absence, of which, in 

 analogous cases, examples are not wanting. On con- 

 cluding the account of this conglomerate I may remark 

 generally, that I have not been anxious to record those 

 which occur in Sky. They are very unimportant in their 

 topographic extent, and being in a general view portions 

 of the series with which they are found, they are often 

 implied in the descriptions of the principal strata where 

 they have not been particularly specified. 



To avoid recurring hereafter to this district, I shall 

 here notice the scattered manner in which the syenite 

 occurs in it, although properly belonging to a future stage 

 of the description. Besides Ben na Charn, a second ridge 

 is found extending from Kilbride, and separating two 

 portions of limestone. Together with this, several partial 

 spots of the same substance occur dispersedly among the 

 limestone, not only in the hills above, but in the lower 

 parts of the valley, where the great continuous mass that 

 occupies so large a tract in the island first commences. 

 The positions of these several portions are such that they 

 cannot, for want of local references, be accurately pointed 

 out; while they are often so small, that no map on an 

 ordinary scale is sufficient to represent them. It must 

 suffice that they have been thus, generally, enumerated ; 

 and I have only to add, that they are distinctly to be 

 seen lying over the limestone, even where it possesses 

 the stratified character ; while in other places they pene- 

 trate the beds in a manner which will be more properly 



