208 Mr. Hutton on the Stratiform Basalt. 



No 10. — Appearance in a Burn, running into Blackburn, near Raven Crag. 



SEALB & SLATY SAHBSTQHE .--•'"-." ;. 



IiBtESTOITE <§8<lt - " : • 111111 1 



STTAI^r , _ " '" - 



111! v "^« 



No. 11. — Appearance on the Beach at the south side of Holy Island below the Town. 



^. 



ILH.IESTOITIS 



In these cases it is curious to observe how the inequality is got over 

 by the edge of each successive bed terminating at the Whin. 



I confess it is to me impossible to conceive that a bed exhibiting such 

 a great irregularity of thickness, could have forced for itself a passage 

 between beds already consolidated without mechanical action being- 

 apparent on the beds above it ; the marks of which, if they do exist, 

 I have hitherto failed in observing. 



Professor Sedgwick gives two instances which appear to confirm 

 strongly the view he has taken. The first is in his Section (Plate 8, Fig. 

 3, vol. ii. Camb. Phil. Trans.) of the Trap of Saddle Bow, in Lune- 

 dale, where the Whin appears connected with great mechanical action, 

 which has broken and confused the adjoining strata ; but if we suppose 

 the Trap of the Conical Hill, which, as he says, "is the centre of the 

 confusion marking the neighbouring parts of the valley," to be an in- 

 truder at a subsequent period (and its connexion with a regular Basaltic 

 Dyke might lead us to infer that it was so), then the difficulty will be 



