The movement of water in an erratic fashion often characterized by swirling, whirlpool-like eddies. Most stream flow is of this type​

turbulent flow

Explanation:

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the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks