I assume (unless I miss something important) that a meteorite falling on
Mars would not carry any kind of fusion crust because of the particular tiny
atmosphere (friction and melting minimized or nil, especially if oxygen is
Hello, isn't, the fusion crust is caused by friction = heating ablation alone and is independent of oxygen? Also, there is plenty of atmosphere to cause ablation on Mars, just much more likely that the impact occurs while ablation is still in process, or not cooled as much as on Earth, for all except small pieces, and that larger pieces survive passage of the atmosphere to have fate determined at impact.
And tektites should be very common on Mars...it would probably be an excellent place for a meteorite hunter to make a tektite collection. Perhaps red like Sahara Glasses are common.