Tag Archives: david montgomery

New book by UW’s David R. Montgomery addresses how to rebuild Earth’s soils

In the introduction, University of Washington geologist David R. Montgomery writes that he never thought he’d write an optimistic book about the environment. Montgomery’s first popular book, “Dirt,” was about how erosion undermined ancient civilizations around the world in places like modern-day Syria and Iraq. (more…)

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Soil production breaks geologic speed record

Geologic time is shorthand for slow-paced. But new measurements from steep mountaintops in New Zealand shows that rock can transform into soil more than twice as fast as previously believed possible.

The findings were published Jan. 16 in the early online edition of Science. (more…)

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Geochemical ‘fingerprints’ leave evidence that megafloods eroded steep gorge

The Yarlung-Tsangpo River in southern Asia drops rapidly through the Himalaya Mountains on its way to the Bay of Bengal, losing about 7,000 feet of elevation through the precipitously steep Tsangpo Gorge.

For the first time, scientists have direct geochemical evidence that the 150-mile long gorge, possibly the world’s deepest, was the conduit by which megafloods from glacial lakes, perhaps half the volume of Lake Erie, drained suddenly and catastrophically through the Himalayas when their ice dams failed at times during the last 2 million years. (more…)

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New Book Explores Noah’s Flood; Says Bible and Science Can Get Along

“I doubt the historic truth about Noah’s Flood will ever be known with certainty. And I don’t think it really matters. The discoveries of science have revealed the world and our universe to be far more spectacular than could have been imagined by Mesopotamian minds. To still see the world through their eyes is to minimize the wonder of creation.”

David Montgomery, “The Rocks Don’t Lie”

David Montgomery is a geomorphologist, a geologist who studies changes to topography over time and how geological processes shape landscapes. He has seen firsthand evidence of how the forces that have shaped Earth run counter to some significant religious beliefs.

But the idea that scientific reason and religious faith are somehow at odds with each other, he said, “is, in my view, a false dichotomy.” (more…)

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Landslides Linked to Plate Tectonics Create the Steepest Mountain Terrain

Some of the steepest mountain slopes in the world got that way because of the interplay between terrain uplift associated with plate tectonics and powerful streams cutting into hillsides, leading to erosion in the form of large landslides, new research shows.

The work, presented online May 27 in Nature Geoscience, shows that once the angle of a slope exceeds 30 degrees – whether from uplift, a rushing stream carving away the bottom of the slope or a combination of the two – landslide erosion increases significantly until the hillside stabilizes.

“I think the formation of these landscapes could apply to any steep mountain terrain in the world,” said lead author Isaac Larsen, a University of Washington doctoral student in Earth and space sciences. (more…)

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