2o8 
SCENERY OF SWITZERLAND. 
the lake, and the depression continues to the west 
up the Isenthal, and to Altzellen, south of Stanz, and 
eastwards by Rieinenstalden across the Muottathal 
and up the Starzlen brook. The strata exposed at 
Sissikon by no means form the bottom of the fold. 
It continues mucli deeper, and then, according to 
Heim, turns up and reappears just beyond the Tell 
Chapel, and at the opposite side at Isleten, where 
Eocene strata again occur. Such a contortion is 
almost inconceivable, but the marvellous foldings of 
the Neocomian strata, which we can see for ourselves, 
a little further along the road towards Stutzegg just 
before reaching I'luelen, are enough to convince us 
that it is not impossible, and Prof. Heim has certainly 
brought forward strong evidence in favour of his view. 
The two “Mythen,” which form a grand feature 
as we look up the Muotta Valley from Brunnen, 
consist of Jurassic and Triassic strata resting on 
Eocene. Their structure has given rise to much dis- 
cussion. The Buochserhorn and the Stanzerhorn present 
a similar arrangement, and the probable explanation 
has been given in chapter xiii. (see ante, p. 66). 
Valley of the Upper Reuss. 
For some distance above Fluelen the valley is 
occupied by deposits of the Reuss. The living rock 
