THE RHINE. 
195 
Ragatz is celebrated for its hot springs and the 
gloomy gorge of the Tamina. 
The valley of the Rhine at Sargans below 
Chur divides into two branches. At one time 
(see Figs. 59, 60; vol. i. pp. 220, 221) the river 
appears to have followed that on the left, and pass- 
ing through the Lakes of Walen and Zurich to 
have occupied what is now the course of the Limraat 
and rejoined its present course at Waldshut. At 
present, however, it takes the right branch and so 
joins the Lake of Constance at Bregenz. 
The ancient glacier of the Rhine extended beyond 
the Lake of Constance and even invaded the valley 
of the Danube. 
Here, as in the case of the Rhone, it is very in- 
teresting to see how the rocks forming the moraines 
retain their respective positions to the end. There 
are some characteristic rocks which are of very local 
origin. Guyot mentions especially ( i ) the Porphyritic 
Granite of the Puntaiglas district, (2) the Green 
Granite of the Julier Mountains, (3) the Brown Gneiss 
of the valley of Montafun. 
The Puntaiglas Granite keeps always to the west. 
One belt passes down the valley of the Lake of 
* Guyot, “Sur la distribution des especes de roches dans le 
basin du Rhone,” Bull. Soc. Neuchdtel, vol. i. 
