New model suggests lost continents for early Earth
from Science Daily
A new radioactivity model of Earth's ancient rocks calls into question current models for the formation of Earth's continental crust, suggesting continents may have risen out of the sea much earlier than previously thought but were destroyed, leaving little trace. Scientists at the University of Adelaide have published two studies on a model of rock radioactivity over billions of years which found that the Earth's continental crust may have been thicker, much earlier than current models suggest, with continents possibly present as far back as four billion years.
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