INISH CAPEL. GEOLOGY. 109 



scribed in many of the Trap islands to the northward. It will 

 also hereafter be shown, that the rare and detached portions 

 of secondary rocks which occur in Seil and on the ad- 

 joining mainland, present a corresponding inclination; 

 which is here the reverse of that of the primary strata 

 on which they lie, the dip of these being invariably 

 to the eastward. The angle of inclination to the horizon 

 seems here to be about fifteen or twenty degrees ; but 

 a boisterous sea breaking over the rock, prevented me 

 from making any very accurate remarks on this unim- 

 portant part of the subject. The lowest bed at that 

 time admitting of examination, was a gravelly conglo- 

 merate with an argillaceous base, including fragments 

 of quartz. It is succeeded by beds of a red schistose 

 sandstone, followed by others of a grey colour and more 

 argillaceous composition. These beds are precisely similar 

 to those that accompany the lowest red sandstone, to 

 which they doubtless belong. If any primary strata are 

 here to be found below them, they were concealed by 

 the state of the tide and the high running of the swell. 



Incumbent on these rocks is a mass of trap which 

 constitutes the main bulk of the island ; but as it 

 occurs in abundance both in Kerrera and Seil, the de- 

 scription of its peculiar characters may be deferred. 



It is evident from this brief account, that Inish Capel 

 resembles in some measure the neighbouring parts of 

 Mull, and it will hereafter be shown to correspond more 

 exactly with Kerrera and the northern parts of Seil; 

 forming a connecting link between the former and the 

 two latter islands. 



