Like we have geysers & hot springs, are there any similar hot spots on Mars that we know of?

Question

While more subdued than her sister planet, Earth, Mars has had volcanic activity in the past. Are there any places on the surface of Mars where "hot springs" or geysers are known to have developed?

Answer 1

Volcanism on Mars looks much like it does on Earth.  Earth has a big plume that has created the Hawaiian islands.  Mars has Olympus Mons, and a nearby chain.  You might even draw a parallel with the great red spot on Jupiter.

Water based geysers would likely have been eroded unrecognizable by now.

In the Spring, these black spots appear.  This only happens near the poles.  The spots look like banyan trees from orbit.  But they appear to be caused by eruptions from below the ice.  The ice is clear, allowing sunlight to penetrate.  CO2 ice (with included dark dirt) from below is warmed and turns to gas.  The ice above eventually cracks and buckles.  You get a geyser where the high pressure gas is released.  This causes a big splotch on top.

Answer 2

Firstly, Mars is too cold to have rivers... this is because the planet has cooled (yes, planets cool over billions of years) to a point rivers are not possible,

Secondly, Carbon dioxide is only liquid in high pressure systems ( 1000m below sea level, and to produce decaffeinated coffee), usually it is solid and gas.

On Mars, there is only solid and gas Carbon dioxide as the pressure is too small to make it liquid.

Thirdly, There is little (possible none) water on Mars... in fact, the so called "ice poles" of Mars is Solid Carbon Dioxide.