| The culprits are more likely to be tiny carbonate crystals and abiogenic magnetite. |
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| In the event of widespread outgassing, however, it is likely that abiogenic gas would be too diffuse to be of commercial interest. |
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| Sand made from rock is called abiogenic sand. |
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| Continuous outgassing of these hydrocarbons may be taking place from within Earth, and some may have accumulated as abiogenic gas deposits without having passed through an organic phase. |
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| The controversy isn't over whether abiogenic oil reserves exist, said Larry Nation of the American Association of Petroleum Geologists. |
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| Most Precambrian chert is abiogenic, whereas silica-secreting organisms have controlled the accumulation of most cherrty deposits since the Cambrian. |
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| Abiogenic sand contains a small amount of calcium carbonate particles and will also react to the vinegar, but not as dramatically as biogenic sand. |
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