90 
SCENERY OF SWITZERLAND. 
Strata, which are thrown into a succession of synclinal 
and anticlinal folds. The greater part of the original 
“Haut Lac” is now a plain, filled up to an unknown 
depth by the deposits of the Rhone. The “Haut 
Lac” is in fact a transverse river valley cut out by 
the Rhone, and subsequently, owing to a change of 
inclination, partly filled up again. 
This distinction between different parts of the 
lake is to some extent recognised in the local, 
nomenclature, the eastern end being known as the 
c M 
Scale: horizontal 1:200 000^, vertical 1:25 000«. 
Fjg. ioo. — Profile across the Lake of Geneva from Cully to Meillerie. 
“Haut Lac,” the centre as the “Grand Lac,” and the 
narrower western end as the “Petit Lac.” 
The water of the Rhone from its greater density 
sinks rapidly below the blue water of the lake, but 
the fine mud is carried halfway across the lake, and 
covers the bottom as far as Amphion and St. Sulpice. 
Tlie “Grand Lac” is bounded on the north by 
Miocene Mollasse, on the south as far as Tour-Ronde 
by Lias and Jurassic, and further to the west by 
immense alluvial and glacial deposits. The centre 
(Fig. ioo) is occupied by an almost horizontal plane 
