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Chromium and nickel in the fig tree shale from South Africa |
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| Authors: | Danchin R V |
| Abstract: | Exceptionally high contents of chromium and nickel in shales from the early Precambrian Fig Tree series of South Africa ( 3.1 x 10(9) years old) suggest that the ancient crustal rocks from which these sediments were derived were ultramafic in composition. |
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