Valles Marineris - How do young earthers explain ancient geology on other planets?

Kind of looks to me like something hit the planet and skidded along for a while, or many somethings or a something that broke into pieces. Meteors usually hit straight on of course, thanks to gravity pulling them in, and leave those characteristic craters, but still, maybe a really big one hit and parts of it slid across the surface to dig a canyon. Looks to me like that anyway. At one end of the canyon those shallow serpentine tracks suggest that small pieces of the something skittered hither and thither.The canyon doesn't look like it was caused by a cracking of the surface. Certainly doesn't look anything like the Grand Canyon close up.Anyway, something like that would be a pretty cataclysmic and not long term event.

I don't know how I missed this post when I tossed off my answer. I think that YEC answer you quote makes sense, although I don't see where water comes into the picture or HAS to come into the picture. It certainly makes sense that meteor hits could trigger volcanism. It's quite clear as a matter of fact that this is what must have happened on the moon, where meteor craters appear to have filled with black lava, no doubt released by the impact itself.I still think that valley on Mars looks like a big scar, a gash brought about by something external that hit it, not something brought about at ground level.For reference: picture of the Valle MarinerisEdited by Faith, : to add picture

Good to know, thanks, beyond my knowledge of physics. So much for my theory.What about the theory posted earlier that a huge meteor hit caused a volcano on the exact opposite side of the planet from the impact?(I don't get the other part of that theory myself, whatever they think created the valley at yet another location, or the idea that water was somehow involved)And by the way, thank you for allowing me back at EvC, Percy.Edited by Faith, : No reason given.Edited by Faith, : No reason given.