Glaciers eroded mountains faster

Dec 11, 2005

U.S. researchers have have documented how fast glaciers eroded the topography of the Coast Mountains of British Columbia, Canada.

University of Michigan, California Institute of Technology and Occidental College researchers used a new geochemical tool to quantify the rates and magnitude of glacial erosion across a major valley.

They found that glaciers radically altered the landscape around 1.8 million years ago -- about the time that Earth began to experience a number of ice ages.

The erosion rates documented in the study suggest that glaciers eroded the mountains six times faster than rivers and landslides had before glaciation began. The researchers also found that glaciers scraped at least about 1.2 miles of rock from the mountains.

"These results are exciting, because they clearly document that glaciers are the most efficient method for sculpting the topography of the range," said Todd Ehlers of University of Michigan.

The findings are published in Science.

Copyright 2005 by United Press International

Explore further: Chandra X-ray Observatory finds planet that makes star act deceptively old

add to favorites email to friend print save as pdf

Related Stories

The world's lakes have finally been counted

Sep 03, 2014

Finland is called 'the land of a thousand lakes'. On registration plates in Minnesota it says '10,000 lakes!', and in Sweden there are about 100,000 lakes. But how many lakes are there in the whole world? ...

Climate change not so global

Aug 04, 2014

(Phys.org) —Scientists are calling for a better understanding of regional climates, after research into New Zealand's glaciers has revealed climate change in the Northern Hemisphere does not directly affect ...

Recommended for you

User comments : 0