FIGURE 8 Map of the (a) fractures and (b) ridges on the floor of the Caloris Basin. The basin interior is shown in brown, and the
dash-dot line to the northeast of the main ring is a faint outer ring. The floor fractures and ridges have both radial and concentric
components. The red spots are post-Caloris craters, and the blue ones are pre-Caloris craters partly covered with basin ejecta. The lines
radial to the basin are lineations due to the basin ejecta, and the thick black lines are lobate scarps. The small green spots at the eastern
edge of the basin are rimless volcanic collapse pits. (From Strom et al., 1975,J. Geophys. Res.80,2478–2507.)(a) (b)
FIGURE 9 (a) A portion of the hilly and lineated terrain antipodal to the Caloris impact basin. The image is 543 km across. (b) Detail of
the hilly and lineated terrain. The largest crater in (b) is 31 km in diameter. (Courtesy of NASA.)
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