Wood lasts essentially forever in the southwest. We have dendrochronological records going back thousands of years from the Colorado plateau because there's so

Wood lasts essentially forever in the southwest. We have dendrochronological records going back thousands of years from the Colorado plateau because there's so little decay. There just wasn't much of it to build with out there by the classic period, so they relied more on abundant stone rather than trying to drag more timbers than strictly necessary the tens of kilometers from where they grew to where pueblos were built. You probably know this as well, but for those that don't, the Anasazi are typically called "Ancestral puebloans" in modern literature because it's been well established that they didn't actually go anywhere, they're pretty direct ancestors of the modern puebloan nations (among others).