Earth’s sea level has remained fairly constant during the last 541 million years, but a new study suggests the planet may have been covered by a vast global ocean 4 to 3.2 billion years ago.
The new findings challenge earlier assumptions that the size of the Earth’s global ocean has remained constant over time and offer clues to how its size may have changed throughout geologic time, according to the study’s authors.
Most of Earth’s surface water exists in the oceans. But there is a second reservoir of water deep in Earth’s interior, in the form of hydrogen and oxygen attached to minerals in the mantle.
A new study in AGU ...
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