Electron microscope images and chemical maps of the crater-like structure observed on the A0226 surface. (a) Panoramic SE image of the impact-crater-like structure, outlined by the continuous curvilinear white line. The white dashed rectangle indicates the area shown at high magnification in panel (b), which presents the internal crater-like structure in electron backscattered mode. (c)–(e) FEG-SEM-EDS element maps of the same region (highlighted in Figure 1(b)) for sulfur (S, k-line), iron (Fe, k-line), and silicon (Si, k-line), respectively.