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TOPIC: North American plate

Blobrana

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Posts: 131433

Date: Dec 18 17:36 2010

North American plate	Permalink

Raindrops reveal how a wave of mountains moved south across the country Analysing the isotope ratios of ancient raindrops preserved in soils and lake sediments, Stanford researchers have shown that a wave of mountain building began in British Columbia, Canada, about 49 million years ago and rolled south to Mexico. The finding helps put to rest the idea that there was once a Tibet-like plateau across the western United States that collapsed and eroded into the mountains we see today. Read more __________________

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