Biology, 25.06.2019 04:50, my7butterflies

All rock on the ocean floor is less than 180 million years old because the basaltic rock seafloor has been ground away by fine sediment older rock would have returned to the mantle through subduction reverse polarity removed older rock strips magnetized in a different direction the oceans did not exist until more recently than 180 million years ago

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All rock on the ocean floor is less than 180 million years old because the basaltic rock seafloor h...