Definitions
from The Century Dictionary.
- noun In geology, the belt of earliest deformation and uplift in a mountain system.
Etymologies
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Examples
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He states that what is known as the Archaean protaxis, or that rugged, rocky region which stretches away from the St. Lawrence River, expanding to the northwestward, and occupying a large part of Northern Ontario, has produced and is constantly producing, a group of what may be called unique, or at least comparatively rare, economic minerals.
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