Why are older parts of the ocean floor no older than about 200 million years?

Question

Kadyn Heath

Chemistry

20 September, 08:28

Why are older parts of the ocean floor no older than about 200 million years?

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Answers (2)

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Lina Elliott · Answer 1

The older parts of the ocean floor are no older than about 200 million years old is because of subduction. Subduction is "the sideways movement of the edge of a plate of the earths crust into the mantle beneath another plate."

This basically means that the ocean floor is renewed every 200 million years.

Daphne Petersen · Answer 2

They are older because they were there before the new pats of the floor and only the new parts of the floor get washed away and the old parts stay.