SP-424 The Voyage of Mariner
Fig. A-32. The jumbled terrain
antipodal to the Caloris Basin was also covered in detail by Mariner.
A photomosaic from Mercury I (a) shows the peculiar nature of this
area of hills and ridges cutting across craters and intercrater
areas. The rims of flat-floored craters are partially disrupted and
hills are dissected. A close view of part of this terrain is shown in
(b, and an even closer view in (c). A high-resolution frame within
the area obtained by Mercury III is shown in (d). Since this terrain
is antipodal to the Caloris Basin, it has been speculated that it may
have been caused by a focussing of seismic forces originating from
the Caloris impact.
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