The earth gets bombarded daily by literal tons of debris from space, and every few hundred or thousand years one makes it through that leaves a mark. If you look at Mars (which looks like our desert) it's an obvious comparison. The earth of course has one big thing that Mars doesn't (anymore) and that's water. So I get that over millions of years a crater could get filled in. Also, the American desert wasn't always a desert, it was an ocean at some point too...so that means LOTS of water. But still, it's been a desert for a LOOOOONG time, so I would expect to see evidence of some recent impacts.
Anyways..I was looking, and hard, and didn't find squat. Until. I spotted this beauty, but it has another possible explanation. It is possible that this is from volcanic activity...there was way more than I knew or expected. Where I spent my first day hiking outside of Vegas, the Valley of Fire, is largely the result of volcanic activity. Anyways..all I can tell you about this crater is that it was east of the Grand Canyon but west of the mountains.
