Large landmasses existed 2.7 billion years ago. Summary: Some 71 percent of Earth's surface is covered by oceans and 29 percent by land. The question of when large landmasses emerged from the oceans has always been hotly debated.
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Large landmasses existed 2.7 billion years ago. Summary: Some 71 percent of Earth's surface is covered by oceans and 29 percent by land. The question of when large landmasses emerged from the oceans has always been hotly debated.
hope it helps