HOME >> BIOLOGY >> NEWS
Ancient raindrops reveal the origins of California's Sierra Nevada range

One of the longest ongoing controversies in Earth science concerns the age of California's Sierra Nevada, the tallest mountain range in the continental United States and site of Yosemite National Park, Lake Tahoe and other scenic wonders.

"The debate falls into two camps," said C. Page Chamberlain, professor of geological and environmental sciences at Stanford University. "One is that the mountains rose from sea level in the last 3 to 5 million years, which is very recent on a geologic time scale. The other group suggests a much more ancient origin going back 60 million years or so."

Now, in a study published in the July 7 edition of the journal Science, Chamberlain and Stanford colleagues Andreas Mulch and Stephan A. Graham present strong evidence that the Sierra Nevada range has stood tall--7,200 feet (2,200 meters) or higher--for at least 40 million years.

"An elevation profile drawn across the northern Sierra Nevada 40 to 50 million years ago would not look much different than today's profile," said Graham, the Welton Joseph and Maud L'Anphere Crook Professor of Applied Earth Science at Stanford.

"Those mountains probably have persisted since the Mesozoic Era--more than 65 million years ago--until today," Chamberlain added. Back then, according to many scientists, California was split by an ancient subduction zone--a region of constant geologic upheaval, where a plunging oceanic tectonic plate continuously pushed the continental North American plate higher and higher to create the Sierra Nevada range.

This version of events is in sharp conflict with the "recent uplift" scenario, which argues that the Sierra rose from sea level to 7,200 feet about 3 million to 5 million years ago after an enormous block of the Earth's crust broke off and fell into the mantle. According to this hypothesis, the crust was then replaced by hot, buoyant mantle material that eventually raised the mountains. Although the Science study found
'"/>

Contact: Mark Shwartz
mshwartz@stanford.edu
650-723-9296
Stanford University
6-Jul-2006


Page: 1 2 3 4 5

Related biology news :

1. Ancient retrovirus sheds light on modern pandemic
2. Ancient Etruscans were immigrants from Anatolia, or what is now Turkey
3. Ancient DNA traces the woolly mammoths disappearance
4. Ancient amphibians evolved a bite before migrating to dry land
5. Ancient T. rex and mastodon protein fragments discovered, sequenced
6. Ancient coral reef tells the history of Kenyas soil erosion
7. Ancient genes used to produce salt-tolerant wheat
8. Ancient climate change may portend toasty future
9. Ancient ape ruled out of mans ancestral line
10. Ancient predator had strongest bite of any fish, rivaling bite of large alligators and T. rex
11. Ancient birds flew on all-fours

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/27/2021)... ... March 25, 2021 , ... Phlexglobal announced ... Planet Group, has selected Phlexglobal and its innovative regulatory SaaS software, PhlexSubmission, as ... a comprehensive review of five regulatory software companies, with the review team including ...
(Date:3/27/2021)... ... 25, 2021 , ... The 2021 Virtual Conference on Clinical Trial Supply-Europe ... More and more, clinical trial supply conferences are featuring speakers and forums that ... Asymmetrex’s founder and CEO, James L. Sherley, M.D., Ph.D., presented a talk ...
(Date:3/23/2021)... ... March 23, 2021 , ... G-CON Manufacturing (G-CON), the ... by Matica Biotechnology (Matica Bio), a contract development and manufacturing organization (CDMO) specializing ... the cleanroom build out for its new GMP production facility in College Station, ...
Breaking Biology News(10 mins):
(Date:3/27/2021)... ... March 24, 2021 , ... ... Life Sciences and Healthcare firms of all sizes, adds depth to its team ... specialist. Pardillo, who earned his doctorate in computational chemistry from Florida International University ...
(Date:3/27/2021)... ... March 24, 2021 , ... ABI Wellness, ... and reporting approach designed under CEO Mark Watson, today announced a webinar dedicated ... featuring guest speakers Dr. Cameron Clark, Neuropsychologist and Founder of Sharp Thinking, and ...
(Date:3/27/2021)... ... ... The Xtalks editorial team is pleased to announce the launch of the ... joined by editorial team members Ayesha Rashid, Sydney Perelmutter and Mira Nabulsi to discuss ... including insights from industry experts. , The Xtalks Life Science podcast will feature ...
(Date:3/23/2021)... Conn. (PRWEB) , ... March 23, 2021 , ... ... develops solutions for characterizing microbiome populations down to the strain level, recently unveiled ... applications. , Not all microbes are created equal: some are easy to ...
Breaking Biology Technology:
Cached News: