13 C-Depleted Carbon Microparticles in >3700-Ma Sea-Floor Sedimentary Rocks from West Greenland
Turbiditic and pelagic sedimentary rocks from the Isua supracrustal belt in west Greenland [more than 3700 million years ago (Ma)] contain reduced carbon that is likely biogenic. The carbon is present as 2- to 5-micrometer graphite globules and has an isotopic composition of δ 13 C that is about –19...
| Published in: | Science |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
1999
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| Online Access: | http://dx.doi.org/10.1126/science.283.5402.674 https://www.science.org/doi/pdf/10.1126/science.283.5402.674 |