338 



SIR A. GEIKIE ON THE TERTIARY 



[May 1896, 



the lavas can best be seen. The eastern cliffs of Svino present 

 admirable examples, where in the same vertical wall of rock some 

 of the basalts die out to the south, others to the north, while occa- 

 sionally a shorter sheet may be seen to disappear in both directions 

 as if it were the end of a stream that flowed at right angles to the 

 others (fig. 5, below). 



Pig. 3. — Dying out of lava-beds, eastern side of Sando, Faroe Isles. 



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MMM 



The islands of Kalso and Kuno display the most impressive 

 scenery of the plateau-basalts of Faroe. In these northern climes 

 vegetation spreads less widely over rock and slope than it does in 



Fig. 4. 



-Lenticular lavas, western front of Hest'6, Faroe Isles. 



the milder air of the Inner Hebrides. Hence the escarpments 

 sweep as vast walls of almost bare rock from the level of the sea 

 up to the serrated crests of the islands, some 2000 feet in height. 

 Each individual bed of basalt can thus be followed continuously 



Pig. 5. — Lenticular lavas, eastern side of Svino, Faroe Isles. 



Mi 



um v -w. 



11 



along the fjords, and its variation or disappearance can be readily 

 observed. Coasting along these vast natural sections, we readily 

 perceive that the successive sheets of basalt have proceeded from 

 no one common centre of eruption. They die out now towards one 



