THE FORMER EXTENSION OF GLACIERS. 135 
lake, as for instance, at the Lake of Hallwyl (Fig. 
35 > 
Far down the valleys we find moraines, exactly 
similar in character to those still being formed along 
the sides and in front of existing glaciers, and re- 
peated again and again, indicating that glaciers 
must once have extended far beyond their present 
areas. 
The Rhone glacier occupied the Valais, in which 
Fig. 'id. — Section across the Vallejo of the Aar above Coblenz. Scale, 
length 1=100,000 ; height 1=25,000. z, Lower alluvial terrace; y, upper 
alluvium covered by moraines and Loess; a', alluvium of the upper pla- 
teaux, covered by Loess ; Jurassic strata m situ. 
are several ancient moraines; it filled the whole basin 
of the Lake of Geneva; and the high terrace of St. 
Paul above Evian is a moraine, due to the confluence 
of the ancient glaciers of the Rhone and Dranse; so 
is also the promontory of Yvoire. Still further down 
the valley glacial deposits are found along the Rhone 
as far as, and even beyond Lyons,* and down the 
Aar to Waldshut. 
* Falsan and Chantre, Les Anciens Glaciers du Bassin du 
Rhone. 1880. 
