Mineralogy of Sky. 43 



must however add my suspicions, that when more attention shall 

 have been paid to geological investigations, many of the facts which 

 I have enumerated in various parts of these papers will not appear 

 either so solitary or so extraordinary as they now seem. 



I have shown that this limestone is in contact with the syenite, 

 and it is also in contact with trap, since a hill of this substance is 

 'found surmounting as well as interfering with it near Loch Eishort. 

 I might therefore proceed to describe these rocks according to the 

 order which I have adopted ; but nothing certain is as yet known of 

 their real places, and if, as I imagine, and as I think will appear 

 not only here but on almost every occasion where I have described 

 them, they intrude among the regularly stratified rocks, it will be 

 better to defer the consideration of them, as I have done on other 

 occasions, to the last. Before however finally quitting this lime- 

 stone I must not omit to mention that a similar one is found occu- 

 pying the south side of Loch Sligachan in a similar manner, and 

 that it has in all probability the same origin and connections, al- 

 tiiough I had no opportunity of investigating it to my satisfaction. 



Returning to the original point at Loch Eishort we find the 

 series of beds which follows this limestone in contact with it. At 

 the very point of contact there is an interference of the two sets, 

 which is highly satisfactory, as tending to establi.sli their perfectly 

 consecutive nature, and consequently of determiaing the place of 

 the former limestone without the shadow of a doubt. Where they 

 meet, two or three laminse of the uppermost limestone alternate 

 with an equal number of the lower one, and they are readily dis- 

 tinguished, because the upper ones being mixed with schist have a 

 superior degree of permanence, and project with a sharp edge on 

 the vertically corroded sides of the subjacent one. The upper 

 limestone is equally to be seen following the under one at Kilbride j 



f2 



