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. 2015 Sep 7;6:904. doi: 10.3389/fmicb.2015.00904

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Copyright © 2015 Orcutt, Sylvan, Rogers, Delaney, Lee and Girguis.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Carbon stable isotopic composition of organic matter in basalt samples after incubation, expressed in the delta notation of per mil (note logarithmic time scale). (A) JdF2009 (blue filled triangles), Ula Nui (black open squares), and Marker 2 (red open circles). (B) U1382A 3R4 (purple open crosses), U1382A 7R2 (red filled circles), U1383C 13R1 (blue filled diamonds), U1383C glass (green filled triangles), J2-626-R1 (brown plus signs), J2-627-R3 (black x’s).