Now, however, a paper published in the journal Geology attempts to associate a major flood with the aftermath of an extreme ice age.
According to naturalistic thinking, the Sun was far less bright in its youth than it is now. The faint young Sun paradox was supposed to make Earth almost completely frozen, an epoch known as snowball Earth.
Now, researchers are proposing that the ice melted fast, forming a freshwater ocean 2 kilometres (1.2 miles) deep. They think that volcanic eruptions caused “a runaway greenhouse effect,” as New Scientist puts it.