World Geography
The oldest rock system of the world is:

The Primitive Rock system
None of these
The Archaean Rock system
The Zircons Rock system

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World Geography
The Harmattan is

tertiary wind that carry great quantities of fine dust from the Sahara
All of these
cool, extremely dry wind that forms over the Sahara and blows westward or south-westward to the Af
wind that blows during the dry season from December to February

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