Geology Reference
In-Depth Information
Proterozoic sediments (Ambrose, 1964) is reported from north Greenland (Cowie, 1960,
Fig. 4.18b).
Similar surfaces of low relief preserved in crystalline terrain, but resurrected from beneath Pro-
terozoic and earlier Palaeozoic cover, occur in several parts of the Canadian Arctic.
4.7
SUMMARY
Plains are widely developed in granitic rocks. Fringing the uplands, pediments are well repre-
sented, but they do not extend more than a few kilometres from the higher ground. The extensive
plains are either broadly rolling or of extraordinary flatness. Some of these planation surfaces are
epigene in origin but the very flat ones may be of etch type, and result from long periods of sub-
surface weathering. They are integral components of inselberg landscapes.
REFERENCES
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