LASS RAGE ORMCE AGE LN. SCANDINAVIA 331 
shows how the line of 100 meters encompasses narrow branching 
valleys. We may easily imagine that during a certain stage of 
the melting this line was the snow line and determined the 
extension of the snow-fields. Some glacier descending from 
one of the greater side-valleys may have stopped back the 
water of the main valley and formed a lake. Mr. Rekstad says 
that the river that issues from the Glomdal valley sometimes 
Fic. 7.—The Daemmevand (dammed lake) in Hardanger. 
rises enormously, and that the flood is probably due to the fact 
that the water is temporarily obstructed by the chief glacier that 
intrudes upon the valley. Norway has its Marjelen See cor- 
responding to the famous Swiss lake as is well known among 
geologists through Lyell’s Principles. The Norwegian glacier- 
dammed lake is the Daemmevand (the blocked-up lake) in the 
province of Hardanger, in the high region to the east of the 
town of Bergen. From an extensive snow-field, the ‘‘ Hardanger 
jokul” (jdkul = glacier) descends to a lake. On its way it 
blocks up the ‘‘Daemmevand.” This lake has of late attracted 
some attention, as the water sometimes breaks through the 
glacier and causes sudden and destructive floods. To prevent 
this the government has made a tunnel about 300 meters long 
