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Figure F28. A, B. DEBI-pt scanning results for altered basalt from whole-round Sample 336-U1383C-6R-1-MBIOA. The sample shows heterogeneous regions of fluorescence from both mineralogical and biological signals. The maroon and pink fluorescence is indicative of silicates containing potassium, calcium, and magnesium. Regions of yellow and orange fluorescence indicate areas of the sample with detectable levels of organic carbon. Green areas indicate the presence of biomass. However, these regions tend to be found in the periphery.

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