Tag Directory > Precambrian
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We have 15 results for Precambrian.
11 Citation
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BBC NEWS | Science & Environment | 'Grape' is key to fossil puzzle 1 Citation
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Neodymium-142 Evidence for Hadean Mafic Crust -- O'Neil et al. 321 (5897): 1828 -- Science 1 Citation subscription wall... wishing i hadn't dropped out :@, delicious.com
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Possible oldest-known rocks found 1 Citation more detail. they used Nd-Sm. 4.28 Ga, delicious.com
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Urban Geology of the National Capital Area 1 Citation
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World's oldest rocks discovered in Canada - ABC News (Australian Broadcasting Corporation) 1 Citation How can journalists get away with crap like this! "isotope dating can only be used to date rocks older than 4.1 billion years". Makes me wonder how I am supposed to trust anything else from AFP or the ABC. , delicious.com
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dbedit01.gif (imagem GIF, 482x202 pixels) 1 Citation
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Volcanic shutdown may have led to 'snowball Earth' - environment - 09 May 2009 - New Scientist 1 Citation A 250-million-year shutdown of volcanic activity which is thought to have occurred early in Earth's history may be what turned the planet into a glacier-covered snowball. It could also have helped give rise to our oxygen-rich atmosphere., delicious.com
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