WIEGIE (CILIVES AINID TE26OUMC IBILOCIGS, 1B INO. ESV 
A Easternmost group = Bolgen group —west of the Iller valley. 
B = Barlaui Alp group—northeast of Iberg. 
€ = Tannstaffelalp group-—in Waggi valley east of 
Iberg. ' 
D = Steinibach group, four to six kilometers north of 
Iberg. 
1S = Geschwend-Surbrunnen group—one to two kilo- 
meters north of Iberg. 
= Griindelhiittli group, west of Iberg. 
= Giswyl group, near Giswyl. 
= Flihli group, northwest of Giswyl. 
= Habkern group, in Habkern valley. 
At the south edge of Freiburg Alps southwest of Lake Thun 
may be mentioned: 
J = Lenk-Lauenen group, between Bad Lenk and 
_Lauenen. 
At the west end of the Rhine-Thun cliff zone are seen the 
Alps of Freiburg and Chablais. It should be noted that the 
southern edge of these Alps are in line with the southern limit of 
cliff distribution; the northern border, on the other hand, is not 
in line with the northern border of the Swiss Alps, but extends 
in the form of a bow far out into the Miocene plains (Molasse ~ 
land). In the upper valleys of the Saane and Simmen rivers 
(see map) where these valleys are cut deeply into the Freiburg 
strata typical Helvetian strata, Flysch and Nummulitic limestone 
have been found lying below Triassic and Jurassic strata in Frei- 
burg facies,’ indicating that the Freiburg Alps at this point 
were thrust southward two and one-half to four and one-half kilo- 
meters over the Helvetian strata. We have, therefore, drawn a 
dotted line across the southern portion of the Freiburg-Chablais 
zone to indicate the probable zone of overthrust and colored all 
south of this zone black. It may, however, be that this over- 
thrust is of a more local nature. The remainder of the region is 
striped diagonally black and white. 
To the east of the Rhine-Thun cliff zone the area of the 
strata in East Alpine facies is roughly indicated by alternating 
*Cf, Berichte d. Naturforschende Gesell. v. Freiburg i. B. Vol. IX., Part 2, p. 122, 
1894. 
