GLACIATION OF AN ICELANDIC VALLEY 



123 



Except for this erosional unconformity, there is no evidence, such as 

 any large unconformity or discordance of dip, to indicate any marked 



3caie 



'o 



I— t— L. 



•*o km^ 



teniUi 



Fig. I. — Hvalfjord and vicinity. From Thoroddsen's Map of Iceland, 1900. 



pause in the volcanic activity which built up the plateau. After the 

 building of the plateau, and before the later glacial periods, came 

 the movements which tilted these older basalts, forming a synclinal 



