  New models challenge the long-standing conclusion about Mimas, an icy
satellite of Saturn, being an inactive snowball, suggesting the existence of a
young stealth ocean. Unfortunately, no observable evidence has been found yet
implying tectonic activity and the theoretical subsurface ocean. Here, we
present the first structural geological map of the icy satellite, with the
signs of various tectonic features, along with a simple crosscutting chronology
of lineaments formation. In accordance with the supposedly young age of the
stealth ocean, the observed phenomena are described as putative lineaments,
ridges, and troughs. Simple tectonic features are identified as young compared
to complex structures. The pattern of the linear features seems to overlap with
the allocation of various modeled global nonlinear tidal dissipation patterns.
In such a way, it may provide the first observed evidence for the existence of
the theoretical subsurface stealth ocean. However, the overlapping and
crosscutting relation between craters and the observed features may raise
concerns about the recent formation of such linear features, indicating
possibly long-time dormant or already stopped tectonic processes at the early
embryonic phase of lineament formation billions of years ago.
