782 
in the direction of the ‘‘Vorland’’, the sea-basins will narrow and 
eventually the masses of the present rows of islands will be deposited 
on the site of the present Australian continent, a stage which e.g. 
was reached long before in the Alps. The bend in the inner curve 
Le. that of the active volcanoes, as assumed by us, will widen and 
lengthen in consequence of the outward pressure in all directions. 
The same holds for the Timor-Ceram curve. 
In conclusion we will compare the way in which the voleanic 
rocks of the inner curve of islands occur with that of the voicanic 
rocks encountered at the inner side of the Timor-Ceram row of 
islands. 
A very considerable portion of the produets of the young vol- 
canoes is now deposited under the sea and we saw that part of 
the older voleanie rocks alluded to, evince characteristics indicative 
of a similar formation. Tbe inner curve, less elevated than the outer 
one will rise higher above the sea-level as the crustal movements 
are prolonged. When the voleanie deposits, which at this day are 
still lying far below the sea, will be lifted up above the sea-level, 
they will perhaps have been folded already by the same crustal 
movements and will already have been uplifted or overthrust. When 
these deposits become visible at the coast, erosion has for a long 
period already been affecting the voleanie cones and the voleanic 
products lying far inland; they may even have disappeared completely 
through erosion. It appears, therefore, that the volcanic rocks will 
occur in the inner row of islands in the same way as now in the 
outer row. 
