tt? LABRADOR 
ture of their rock-bands, but as well in the conspicuous 
heights of the individual peaks. The strength of this 
mountainous relief is principally due to the deep incision 
of stream-made valleys in a portion of the Basement Com- 
plex locally, and in a geological sense recently, uplifted 
far above the general level of the Archean plain. So far as 
known, the Torngats thus owe their origin to the selfsame 
processes that have shaped the low but much broken 
plateau of the south. 
A third element in the scenery is found in the high gabbro 
ranges of Nain, Port Manvers, and the Kiglapait. These 
fine mountains may similarly have undergone recent uplift ; 
or, on the other hand, they may be still high because the 
gabbro is tougher than the surrounding rocks and from the 
Archean time to the present has been more stubborn than 
they in resisting the destructive activity of the weather. 
It must be left to future investigation to decide as to which 
alternative is to be preferred. Both may be true. 
Finally, the Kaumajet mountain-group, built on the 
gently undulating floor of the Complex, and showing a 
special composition and history, makes the fourth member 
in our scenic divisions. The stratified rocks forming the 
terraced slopes of the Kaumajets are the youngest solid- 
rock formations yet discovered on the northeast coast of 
the peninsula. No solid formation, with certainty repre- 
senting any of the lifetime of the earth from the earliest 
Paleozoic time to the present, has been found. 
In Labrador the net result of the geological activities of 
this incomprehensible zon appears to have been to demol- 
ish rather than to construct, to wear away old rock-terranes 
rather than to build new ones into the framework of this 
