This is the lichen that grew on the rock left by the glacier that carved the valley.
(This; is; the lichen that grew on the rock) (the lichen; grew; L:on the rock) (the rock; left; by the glacier) (the glacier; carved; the valley)
This the lichen the rock the glacier
is grew left carved
the lichen that grew on the rock
L:on the rock
by the glacier
the valley