It is when 2 plates are moving away from each other and new crust is forming from magma that rises to earth's surface between 2 plates.
hope it helps
Mercury, Hope I helped :)
Earth's age is best estimated by:
Answer: Out of all the options presented above the one that represents the best way to estimate the Earth’s age is answer choice D) using radioactive isotope pairs to date the oldest rocks. This method is best known as radiometric dating.
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