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Sagot :
Answer:
Some cratons in Canada and Greenland shelter the oldest continental rocks in the world, about 4 billion years old. Other cratons in South Africa, Australia and Asia have continental rocks that are 3 billion years old. The oldest seafloor is comparatively very young, approximately 280 million years old.
Answer:
Bedrock along the northeast coast of Hudson Bay, Canada.
Explanation:Canadian bedrock more than 4 billion years old may be the oldest known section of the Earth's early crust.
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