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SCENERY OF SWITZERLAND. 
peripheral glacial deposits are only represented by 
ground moraine. 
The second Ice Age is represented by the mo- 
raines high up on the hills overlooking the valleys; 
and the third by moraines which form more or less 
complete ridges curving across the valleys, and along 
the slopes. It is possible that the glaciers may in 
some cases have been pushed forwards again over 
the inner moraines. At Hallwyl, for instance, the 
moraine immediately encircling the lake is very flat, 
which Dr. Mtlhlberg thinks may be thus accounted for. 
Limits of the Ancient Glaciers. 
The evidence seems then conclusive that the 
glaciers were once far larger than at present, and the 
facts already summarised give some indication of 
the extent. Beginning with the Rhone Glacier, the 
former upper limit of the ice at Oberwald was 2766 
metres, or 1400 above the river;* at Viesch it was 
2700, or 1700 above the river; at Leuk 2100, or 
1470 above the river; at Martigny 2080, or 1620; 
at Geneva 1300, or 950 metres above the Lake.** 
On the slopes of the Jura it rises highest at Chasseron, 
north-west of Neuchatel, opposite the valley of the 
* Falsan and Chantre, Anc. Glaciers du V. du Rhone, vol. II, 
** Favre, Description Geol. du Cmton de Geneve, vol. j. 
