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. 2014 Oct 6;111(43):15338–15343. doi: 10.1073/pnas.1408206111

Fig. 1.

Fig. 1.

UltraSTEM images and EELS chemical maps of organic grains from NWA 852. (A) Overview HAADF image of grain 2_24a with the area of the two EELS maps outlined by white boxes. The grain has homogeneous and dark contrast. (B) Overview HAADF image of grain 2_24b. A lobe of organic material extends into the surrounding matrix (marked by arrows). (C–G) EELS chemical maps in the areas outlined in A with the enrichment of nitrogen in the rim part of the grain, the Ca enrichment, and opposite distribution of nitrogen and oxygen clearly visible.