Geology Reference
In-Depth Information
Figure 6.23. Aine Corona is 250 km in diameter and is located
in plains south of Aphrodite Terra. It has several
at-topped
volcanic domes, some of which are superposed on the ring
fractures, showing that volcanism and tectonic deformation
were occurring at essentially the same time; the area shown
is 300 km by 235 km (NASA Magellan P-38340).
Figure 6.24. Mare ridges in Rusalka Planitia were formed
by compression. Their superposition both on the radar-dark
and on the radar-bright volcanic plains indicates that
their formation occurred after the lavas had been
emplaced in response to regional compression (from Solomon
et al.,
1992
).
Figure 6.25. This Magellan image shows part of Devana
Chasma, a rift system more than 2,500 km long between Beta
Regio and Phoebe Regio. It represents some 20 km of horizontal
extension and is comparable to major continental rift systems
on Earth; the area shown is 670 km by 845 km (NASA Magellan
P-41294).
