https://kgs.ku.edu/san-esteban-rockshelter
But with that said... Sounds like you are interested in Geology. I am too and I question that representative image as the true shelter location. Looking at that wash running next to it I'm pretty sure that torrential flash floods would have washed that away several thousand years ago and the original shelter overhang would not still be there as shown. Over 6500 years time it would have cut into that wall at least 50ft or more. I think they are not representing the true location as to protect it from vandals and pot hunters from digging around. It is a common practice to misrepresent the true location in images of digs like this.