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Debate Erupts Over America's Oldest Rock Title

4/26/2025

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Summary

Story summary

Geologists are sparking a heated debate over the title of "America's Oldest Rock." While Minnesota's gneiss has long been celebrated, experts argue it may be over 300 million years too young. Instead, Michigan's Watersmeet Gneiss, a staggering 3.6 billion years old, could take the crown, shedding light on the intricate art of dating our planet's ancient history.

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Story summary

Geologists are sparking a heated debate over the title of "America's Oldest Rock." While Minnesota's gneiss has long been celebrated, experts argue it may be over 300 million years too young. Instead, Michigan's Watersmeet Gneiss, a staggering 3.6 billion years old, could take the crown, shedding light on the intricate art of dating our planet's ancient history.