This is why it's wise to reassess the various hypotheses about water on Mars.

(Dilute) aqueous solutions of sulfuric and possibly other acids are more likely given what the current missions are finding. Acidic fluids would behave quite differently than pure or briney water, but they are not incompatible with biology.

However, very little carbonate would be produced.

The fluid effects we see on the Martian surface may not have been produced by either water or carbon dioxide.

Who will be the first to model a New Mars flowing with sulfuric acid rivers, filling acid seas and oceans?

Cheers, BRFelix