Geochemists may have tapped into deep rock undisturbed since shortlyafter the planet formed

Earth's Oldest Cranny Explored
Geochemists may have tapped into deep rock undisturbed since shortly
after the planet formed

http://news.sciencemag.org/scienceno...ored.html?etoc

Sam Wormley wrote:

Earth's Oldest Cranny Explored
Geochemists may have tapped into deep rock undisturbed since shortly
after the planet formed

http://news.sciencemag.org/scienceno...ored.html?etoc

Yep. CAA has it in their Learning Centre. (they say!).

On 12/08/2010 11:33 PM, Sam Wormley wrote:
Earth's Oldest Cranny Explored
Geochemists may have tapped into deep rock undisturbed since shortly
after the planet formed

http://news.sciencemag.org/scienceno...ored.html?etoc


Yup, I posted this a couple of days back regarding this discovery too:

These rocks would have originated only 100 million years after the Earth
formed.

***
BBC News - Arctic rocks may contain oldest remnants of Earth
"They collected the lava samples from Greenland and Baffin Island in the
Canadian Arctic. Although they erupted only 60 million years ago, the
lavas contain a chemical signature of a far more ancient source.

They show that beneath the Arctic today are small pieces of mantle - the
toffee-like layer below the crust - that have survived unchanged since
shortly after the formation of the Earth. "
http://www.bbc.co.uk/news/science-environment-10941026
***

This entire region of the Earth, the Canadian arctic, seems to be the
African Rift Valley of ancient rocks, much like the African Rift Valley
is the hotbed of paleontology. The previous oldest rocks were discovered
in this region too, from 4.28 Gyr ago, and prior to that the oldest were
4.03 Gyr ago, also from this region.

***
BBC NEWS | Science & Environment | Team finds Earth's 'oldest rocks'
"Earth's most ancient rocks, with an age of 4.28 billion years, have
been found on the shore of Hudson Bay, Canada."
http://news.bbc.co.uk/2/hi/science/nature/7639024.stm
***

There you have it.

Yousuf Khan