Dan Sedenquist weighed in, (former Geologist):
"...The second photo looks like a volcanic welded tuff (Chiricahuas is a good guess). Bandolier Natl Monument?.."
Pfemm: Other than it is in the south :)
South of what? Or do you mean The South? Plants don't look right for anywhere in the South.
1901 eh?
It still doesn't look right to me and the "South" reference would seem to nix this article I found...The Disappearance of Mount Mazama published in 1901 about the mountain that used to exist where Crater Lake is found today.

Mark