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Ancient Rock Samples Reveal Earth's 3.5 Billion-Year-Old Tectonics

3/30/2026

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Summary

Story summary

The earliest direct evidence of plate tectonics dates to about 3.5 billion years ago, in a study led by Dr. Roger Fu of Harvard University.
The researchers analyzed 900 rock samples from the East Pilbara Craton in Australia, revealing lithospheric rotation.
The findings show Earth's crust was segmented and mobile.
The work provides insights into Earth's early history and life-supporting conditions.

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Story summary

The earliest direct evidence of plate tectonics dates to about 3.5 billion years ago, in a study led by Dr. Roger Fu of Harvard University.
The researchers analyzed 900 rock samples from the East Pilbara Craton in Australia, revealing lithospheric rotation.
The findings show Earth's crust was segmented and mobile.
The work provides insights into Earth's early history and life-supporting conditions.