60(5 



A. HESSELBO 



Fig. 32. Side of lull-cleft near Barkarstadr. At Ihe loot of the cleft, among others 

 Mniiini nndnlalitni grew abundantly. On the sides there grew Htjpnnm filicinum (at the 

 top, to the right), Fegalclld conica (in the middle and to the left), Philonolis fonl<tna. 



Mniobrijnm alhicuns and many other mosses. 



sive action of water, many more clefts and caves \vilh damp sur- 

 faces are met with here than on the basalt, and these provide ideal 

 habitats for a great number of mosses. 



Tuff deposits of volcanic origin are found in many places in 



