Raindrops peg Sierra’s age at 40 million years | SierraSun.com
YOUR AD HERE »

Raindrops peg Sierra’s age at 40 million years

STANFORD, Calif. (AP) ” Prehistoric raindrops locked in crumbling boulders led Stanford University researchers to conclude the Sierra Nevada is at least 40 million years old, much older than previously thought.

New geological evidence shows that the traditional estimate of 3 million to 5 million years old appears far too low, three Stanford geoscientists said in a paper published in Friday’s issue of the journal Science.

There is no debate about the age of the rocks beneath the Sierra: radioactive dating shows they are up to 120 million years old. But scientists have not been able to agree on when the rocks lurched upward to create the mountain range.



Andreas Mulch, Page Chamberlain and Steve Graham of Stanford’s Department of Geological and Environmental Sciences gathered rainwater samples found in dry river tributaries during camping trips in the Sierra starting in 2004.


Support Local Journalism

 

Support Local Journalism

Readers around Lake Tahoe, Truckee, and beyond make the Sierra Sun's work possible. Your financial contribution supports our efforts to deliver quality, locally relevant journalism.

Now more than ever, your support is critical to help us keep our community informed about the evolving coronavirus pandemic and the impact it is having locally. Every contribution, however large or small, will make a difference.

Your donation will help us continue to cover COVID-19 and our other vital local news.

For tax deductible donations, click here.

Start a dialogue, stay on topic and be civil.
If you don't follow the rules, your comment may be deleted.

User Legend: iconModerator iconTrusted User