I just replaced my screen background with a photo from Mars with a big granitic(?)/ granodiorite(?) Boulder, surrounded by volcanic rocks. It is an amazing quandary! Fun to look at, and think - ok, how was this made!? To simplify: the Boulder: is a white rock with black crystals, whereas all the surrounding rocks are dark grey or black(look like lava.) The Boulder is somewhat round(let's say 1 meter across +-100%), has been broken at some of the edges, and rounded at others. How was it broken? Rounded, and the fact it isn't in the Chevy place judging by the surrounding rocks, HOW, did it get there? So we are looking at various igneous processes at work here. Deep and surface. Plus, transport, by water? Ice? Liquid CO2? Unknown.

https://www.goodnewsnetwork.org/wp-content/uploads/2024/06/P...