Quote:
Originally Posted by freebeard
In the video I offered for your consideration he discusses Valles Calderia and the formation of Battleship Rock. I found it interesting; but then that's just me, apparently.
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A flooded volcanic caldera which ruptured, sending a flood, with the capacity to move large boulders.
Valles Marineris is radially disposed upon the Tharsis Bulge, whom some believe was caused by magma intrusion.
The canyon, referred to by many as a rift, would be the artifact of a tectonic plate being stretched apart, as with the Rio Grande.
Adjacent to Valles Marinaris are extinct volcanoes, visible in some of the satellite images.
I got to thinking about Oilpan 4's comments about seismic activity on Mars.
Mars has the two moons, which exert tidal forces on the planet. Within 50-million years, Phobos will reach its Roche Limit, and either crash into Mars, or be torn apart, becoming a ring around Mars.
This 3-body tidal dynamic could trigger fault asperity rupture and quakes.