We can see at once that as quick as the glaciers are removed the denuding forces of nature, which are constantly at work, would begin to rearrange the debris left behind on the surface, and in the course of a few thousand years must effect great changes.
(We; can see; T:at once; that as quick as the glaciers are removed the denuding forces of nature, which are constantly at work, would begin to rearrange the debris left behind on the surface, and in the course of a few thousand years must effect great changes) (the debris; left; L:behind; L:on the surface) (the denuding forces of nature; are; constantly)
We the debris the denuding forces of nature
can see left are
T:at once that as quick as the glaciers are removed the denuding forces of nature, which are constantly at work, would begin to rearrange the debris left behind on the surface, and in the course of a few thousand years must effect great changes
L:behind L:on the surface
constantly