The differences between the biogenic and abiogenic calcite in dinosaur eggshells (IMAGE)
Caption
The differences between the biogenic and abiogenic calcite in dinosaur eggshells: In the PLM images (A and E), biogenic calcite is dark, while abiogenic calcite is bright; On the IPF maps (B and F), the directions of the c-axes of the biogenic calcite grains are consistent (red), while various in the abiogenic calcite grains (various colors); On the BC+GB maps (C and G), biogenic calcite has textured gray scales, while abiogenic calcite has plain gray colors; On the KAM maps (D and H) , biogenic calcite has high KAM values (green), while abiogenic calcite has low KAM values (blue). SEM (I and J) and TEM (K) images show that biogenic calcite has growth lines (arrows) and porous structure. In the CL images (L—N), SEUs are dark or have orange fluorescence, indicating that CL is not an effective method for the identification of biogenic calcite. Scale bars are equal to 200 μm (A, B, E, and F), 100 μm (C, D, G, H, and N), 50 μm (I),15 μm (J), 500 nm (K), and 150 μm (L and M).
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Image by IVPP
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