The research, published in the journal Nature Geoscience, provides evidence that the formation of continents was not a gradual process, as previously thought, but rather occurred in short, intense bursts of activity.
"We have found that the formation of the continents was not a continuous process, but rather occurred in a series of pulses, with each pulse lasting for about 100 million years," said study co-author Dr. Benjamin Wade from the University of Adelaide's School of Earth and Environmental Sciences.
"These pulses were separated by periods of relative quiescence, when little or no continental growth occurred."
The researchers analyzed data from a variety of sources, including geological records, geochemical studies, and computer modeling, to come to their conclusions.
They found that the pulses of continental growth were associated with periods of intense volcanic activity, which caused large amounts of molten rock to rise to the surface of the Earth and form new crust.
"These periods of intense volcanic activity were likely caused by changes in the Earth's mantle, the layer of rock beneath the crust," said Dr. Wade.
"These changes may have been caused by the movement of tectonic plates or by changes in the Earth's rotation."
The researchers say their findings have implications for understanding the evolution of the Earth's climate and the development of life on Earth.
"The formation of the continents has had a profound impact on the Earth's climate and the evolution of life," said Dr. Wade.
"The pulses of continental growth may have led to changes in the Earth's atmosphere and oceans, which in turn could have affected the development of life."
The research team is now planning to conduct further studies to investigate the mechanisms behind the pulses of continental growth and to explore the implications of their findings for the evolution of the Earth and the development of life.
