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Everything you want to know about the sedimentary volcanism (aka mud volcanism) on #Mars but were afraid to ask... disclaimer: this will be a very long thread after which you will never see the mud in the same light as before... 1/n
So let's start. There is a ongoing debate within martian community whether some flow-like and cone-like features on the surface of Mars resulted from igneous #volcanism or sedimentary volcanism. We are trying to find this out really hard, but this is not easy task. Why? 2/n 
The problem is that we know from #Earth that igneous volcanism can form features which look quite similar to sedimentary volcanoes. See for example these two images from Google Earth. Do you want to guess which one is a real volcano? If you want to be sure, what will you do? 3/n
