

/ 



506 



THE SHETLAND ISLES. 



[Cii. XX. 



■ 



the Navir (fig. 40), is widened every winter by the over- 

 whelming surge that, finding a passage through it, separates ' 

 large stones from its sides, and forces them to a distance of 

 no less than 180 feet. In two or three spots, the fragments 

 which have been detached are brought together in immense 



accumulation of cubical masses 



some 



j 



>* 



exam 



indestructibility 



some 



ma 



them to with- 



elements 



cannot permanently resist. There are localities in Shetland, 



almost 



miner 



t> 



& 



m 



Head 



of the Yord Hill in Fetlar, and on the mica-schist of the 

 Bay of Triesta, on the east coast of the same island, which 

 decomposes into angular blocks. The quartz rock on the 

 east of Walls, and the gneiss and mica-schist of Garthness, 



suffer the same fate. 



Destruction of islands. — Such devastation cannot be in- 



committed 



l 



mere 



masses 



To this state many 



hich 



appear to have been reduced, and innumerable fan 

 formes are assumed by rocks adjoining these islands to^ 

 the name of Drongs is applied, as it is to those of similar 

 shape in Feroe. 



Tlio m»QTii+.i/> vnp.lrft ffio* AA\ hp+wppn "Pnna. Strmr and Hllls- 



"Ness afford an exam 



moi 



Hills wick Ness 

 s viewed from 

 to a small fled 



'? 



IT 



essels with 



t We may imagine that in the course of time 



Hillswick Ness 



decomposition 



mica 



tions by veins of felspar-porphyry. 

 Midway between the groups of 



* Hibbert, p. 528. 



t Hibbert, p. 519. 





* 





: 





k 



i 





i 



^ 



