THE GROWTH OF CONTINENTS. 185 
orn side of the Jurassic range sloped directly 
down to the ocean, he will easily understand how 
this second series of deposits was collected at its 
base, as materials are collected now along any 
sea-shore. They must of course have been ac- 
cumulated horizontally, since no loose materials 
could keep their place even at so moderate an 
angle as that of the present lower slope of the 
range ; but we shall see hereafter that there were 
many subsequent perturbations of this region, 
and that these Cretaceous deposits, after they had 
become consolidated, were raised by later upheav- 
als from their original position to that which 
they now occupy on the lower slope of the Jura, 
resting immediately, but in geological language 
unconform ably , against it. The two adjoining 
wood-cuts are merely theoretical, showing by 
lines the past and the present relation of these 
deposits ; but they may assist the reader to un- 
derstand my meaning. 
Figure 1 rep- 
resents the Jura 
before the Alps 
were raised, with 
the Cretaceous 
deposits accu- 
mulating beneath the sea at its base. r l he line 
marked S indicates the ocean-level ; the letter <?, 
the Cretaceous deposits ; the letter /, the Juras- 
sic strata, lifted on the side of the mountain. 
