Cave sediments used to date formation of Hells Canyon, Idaho :

[Jerry]

Hells Canyon, the deepest gorge in the U.S., is surprisingly young

Hells Canyon, the deepest gorge in the U.S., is surprisingly young

Jerry Atkinson.

Journal article: Cave records reveal recent origin of North America’s deepest canyon | PNAS

Cave records reveal recent origin of North America’s deepest canyon | PNAS We explore how and when Hells Canyon, North America’s deepest river gorge (~2,400 m deep), formed, addressing th...

Hells Canyon, the deepest gorge in the U.S., is surprisingly young Hells Canyon is the deepest river canyon in the United States. Now scientists have solved the mystery of when it...