The researchers said that this finding could help solve a fundamental mystery about our planet and also shed light on the formation of other planets.
To test this theory, the researchers used a large database of more than 600,000 samples of the Earth’s rock records, which have been analyzed by scientists across the world for their geochemical contents and age. The researchers said that the rock record is more reliable than the mineral record, which was used to support the rapid formation theory because it is more sensitive and less biased on those time scales.
The result was surprising: The crustal growth curve based on the rock record matched the mantle growth curve, indicating a correlation between the two layers. This contradicts the idea of a sudden change in crustal growth 3 billion years ago and supports a more gradual evolution of both crust and mantle.
He added that the study improves our understanding of how our planet formed and changed over time, but it is not conclusive. He said that there are still many gaps in the data and uncertainties in the methods. He also said that further analysis of the existing data could help explore other planets, such as Venus, which has no tectonic plates and could resemble early Earth.
The study was co-authored by Joshua Davies from the University of Quebec at Montreal; Jean-François Moyen from the University of Lyon, France; and D. Graham Pearson from the University of Alberta, Canada.
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