I spent 28 working on the roads, and a massive proportion of that time was doing tree work, and along with that 24/7 oncall for emergence tree work.
I can't even count how many times we had trees down from the weight and underdeveloped root system from x amount of years of dry weather, and also there would be times on the road when cruising in the mountains looking at the massive root balls sticking out of the side of the hill that the dirt had been eroded away for a good part of the bank under the tree. At first that's what I thought you had photographed.
Beautiful photos, every one of them.
Thanks for sharing!