Posted on 10/01/2008 3:41:44 PM PDT by SunkenCiv
Earth's most ancient rocks, with an age of 4.28 billion years, have been found on the shore of Hudson Bay, Canada. Writing in Science journal, a team reports finding that a sample of Nuvvuagittuq greenstone is 250 million years older than any rocks known. It may even hold evidence of activity by ancient life forms. If so, it would be the earliest evidence of life on Earth - but co-author Don Francis cautioned that this had not been established... "Now we have pushed the Earth's crust back by hundreds of millions of years. That's why everyone is so excited." ... the majority of our planet's early crust has already been mashed and recycled into Earth's interior several times over... Before this study, the oldest whole rocks were from a 4.03 billion-year-old body known as the Acasta Gneiss, in Canada's Northwest Territories. The only things known to be older are mineral grains called zircons from Western Australia, which date back 4.36 billion years... The material displays a banded iron formation - fine ribbon-like bands of alternating magnetite and quartz. This feature is typical of rock precipitated in deep sea hydrothermal vents - which have been touted as potential habitats for early life on Earth.
(Excerpt) Read more at news.bbc.co.uk ...
I found an old rock recently in my backyard. Don’t know if it’s the oldest rock, but it is so old it can’t hardly move on its own anymore.
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Mine still moves. Mostly at night.
Ha!
So what age is it then?
yeah. You’ve gotta watch those young and energetic rocks when they go a wandering. They do tend to target the toes of the unwary.
Well there you are.......thought you were still living in the dark........:o)
Was there a limit on looters this season ?
Get that fence fixed yet ?
So, has it been claimed as a sacred Indian hunting ground yet?
That’s a tough one to anagram...
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