Space/Science — HabitableZone

Space/Science » in reply to Wopmay

The medium here is not calcium carbonate
E.P. Grondine — (archived)

First off, try highly concentrated sulfuric acid instead of water for the working fluid.

Now notice the isolated nature of the specimin - this is a boulder which has been ejected by impact, which was then fractured by the forces of landing.

How long ago did this ejection impact happen? Notice the overall rounding - this is the result of "wind" erosion over many many years.

"hematite nodules" form on the floor of the Earth's oceans. On Mars, we've also seen "hematite nodules" in layered wind deposits - they're impact tectites - Mars only has 1/3 of Earth's gravtiy, and the tectite formation process there is also much different than it is on Earth.

At first glance this sample shows 2 distinctly different processes at work - as it marks a transition, detailed study of it would be nice.

Finally, Mars is not Earth-like, it's Mars-like. The sooner people stop trying to argue by analogy, and start arguing by deduction, in other words from physics and chemistry, the better we're going to understand Mars.

ep

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