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

Fig. 3.

Fig. 3.

UltraSTEM images and EEL spectra of grains 13_4 and 14_2 from GRA 95229. (A) HAADF overview image of the remaining material of grain 13_4 (encircled) with distinct mottled contrast due to crystalline inclusions. (B) HAADF overview image of the remaining material of grain 14_2 (encircled) with clean and homogeneous contrast. (C and D) Extracted EEL spectra from the grains with distinct bands around the carbon K edges marked. White lines of Ca are again visible at ∼346 eV in both grains and at ∼290 eV due to carbonate bonding. The N–K edge is rather noisy in grain 13_4 but clearly resolvable above the background.