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100 years ago, a rogue Washington geologist faced ridicule for his ‘catastrophic’ theory. He was right.
Yahoo • • science
Key Points:
- In 1923, geologist J. Harlen Bretz proposed that Eastern Washington's Channeled Scablands were formed rapidly by a catastrophic flood, challenging the prevailing belief that geological features develop gradually over millennia.
- Despite initial ridicule and skepticism from his peers, Bretz's extensive fieldwork revealed unique topography indicative of massive flooding, though the flood's source remained unknown for years.
- The flood source was later identified as Glacial Lake Missoula in Montana, which, upon the collapse of its ice dam near the end of the last Ice Age, unleashed a massive flood that reshaped landscapes across multiple states in just days.
- Bretz's theory of catastrophism opposed the dominant uniformitarianism view and was only widely accepted decades later, with Bretz receiving the Geological Society of America's Penrose Medal in 1979 at age 97.
- Bretz's work revolutionized geology by demonstrating that sudden, large-scale natural disasters could dramatically alter Earth's surface, reshaping scientific understanding of geological processes.
