[GaltAdonis]

How could there be any volcanic activity on Mars?
It's not as if Mars has the largest known volcano in the
solar system on it - or anything like that.

Geez - what maroons...

/sarc

.

Olympus Mons -

[GaltAdonis]

The Olympus Mons volcano is kind of large.
Here is it's size superimposed over France -

[GaltAdonis]

"The volcano (Olymus Mons) has a height of over 21.9 km (13.6 miles
or 72,000 ft) as measured by the Mars Orbiter Laser Altimeter (MOLA). [5]
Olympus Mons is about two and a half times Mount Everest 's height
above sea level."

[MadMax, the Grinning Reaper]

Looks like that very big toadstool or mushroom in my backyard, the one we park our riding mower under at night.

[minnesota_bound]

Back at least 25 million years ago aliens sent probes and reported back that there were volcanoes.

[Sirius Lee]

Olympus Mons -

Mons Venus is a lot more active.