Story perspectives

Study Links Grand Canyon Formation to Ancient Lake Overflow

4/17/2026

Summary

Story summary

A new study suggests the Grand Canyon formed when an ancient lake overflowed around 6.6 million years ago.
Zircon crystals from the Grand Canyon and the Bidahochi basin matched, indicating a link to the Colorado River.
Rock layers show that a strong river flowed into standing water, consistent with the lake-overflow scenario.
Some geologists remain skeptical about the lake's role, while researchers plan further work to clarify the river's historical path and canyon formation.

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Story summary

A new study suggests the Grand Canyon formed when an ancient lake overflowed around 6.6 million years ago.
Zircon crystals from the Grand Canyon and the Bidahochi basin matched, indicating a link to the Colorado River.
Rock layers show that a strong river flowed into standing water, consistent with the lake-overflow scenario.
Some geologists remain skeptical about the lake's role, while researchers plan further work to clarify the river's historical path and canyon formation.