Small floods can carve big canyons

Through the early 20th century, geologists argued over how the giant canyons of the Channeled Scablands in Eastern Washington were formed. Ultimately, a theory proposed by J Harlen Bretz in the 1920s — that the canyons were carved by catastrophic, short-lived outbursts of floodwaters unleashed when natural dams holding back glacial lakes collapsed — was shown to be correct. Controversy still exists, though, about the size of these ancient floods.
 

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Adityarup "Rup" Chakravorty

Chakravorty is a postdoctoral researcher studying herpesviruses by day, and a freelance writer once the sun goes down.

Friday, February 3, 2017 - 06:00