i 62 
SCENERY OF SWITZERLAND. 
deposits must be at least looo feet in thickness. It 
is said that until the fourteenth centuiy the Lutschine 
ran into the Lake of Thun, and mterfered with the 
outflow from the Lake of Brienz giving rise to an 
unwholesome marshy plain, and that the nuns of the 
Convent of Interlaken turned it into the Lake of 
Bnenz. The Aar on the plain of Interlaken follows 
a winding course, being first diverted to the right by 
the cone of the Lutschine, and then to the left by 
that of the Lombach. The original lake, before it 
was divided by the formation of the plain, passed 
through a narrow gap in a fractured and displaced 
Neocomian ridge, very like that which nearly bisects 
the Lake of Lucerne at the two Nasen. 
Grindelwald rests on a rockfall from the Rothi- 
horn, which occupies almost the whole bottom of the 
valley.* To the S.E. of the church, however, a ridge 
of Dogger comes to the surface; while to the S.E. of 
the debris, and at the edge of the Jurassic (Malm), 
a narrow band of Flysch extends N.E. to Meiringen. 
The Grindelwald glacier formerly descended lowest 
of all the Swiss glaciers, the end being in 1868 only 
1080 metres above the Sea. Of late years, however, 
it has considerably retreated. From Grindelwald the 
Atoesch, Bcitr , z. GeoL IG, Schw^^ L. xxiv. 
