Representative phase 1 (sols 101–104) images captured at the Asgard site. (a) MastCam mosaic of the Asgard outcrop. The white arrow indicates the location of the sample Ragnarok. The yellow arrow indicates a possible rounded squeeze-out. White boxes correspond to the locations of (b) and (c). (b) Red hue (yellow arrow) showing evidence for alteration. (c) White circular features initially hypothesized to represent secondary fluid flow and targeted for their proposed astrobiological significance. (d) Representative image showing dark-toned and light-toned sediment populations at Asgard. (e) Representative millimeter- to centimeter-scale vesicles on the older lava flow.