In my last question, I was asking what kind of shelter would need my arboreal civilization (Here is the link). To recap very quickly : they constantly live in heights of giant trees, and never go down (too dark and dangerous out there), so they are still hunter-gatherers.
But a problem came up : they don't have access to any kind of ressources that would allow them to create tools or weapon to hunt or gather in those hights. And since they can't reach the ground I needed them to have access to those ressources while staying up there. So why not bring the ressources to them directly ? (it will be divided in two questions)
For that I thought about having rock columns like those of Zhangjiajie National Park in China, in a way that the trees started to grow there way after the columns formed. The question is to know if such mix is even possible geologically.
What I know so far about this natural park :
There is about 3100 columns scattered on 86km2, and their hight varies between 120 to 350 meters high. 443 to 419 Mya, what is now the park was surrounded with oceans. When the two blocks who formed China collided, layers of sediment were lifted up, causing the drop of the oceans and the formation of moutain ranges. It's between 160 and 68 Mya that what allowed the formation of those columns appeared : big faults formed due to a second lift.
The giant trees, which grow more of less at a high of 250 meters, appeared in a similar area about 25 000 years ago, and grew litterally between the columns. What I was wondering is : would the trees destroy / weaken the columns, or, on the contrary, support them (if they can grow there at all) ?
I though that if the branches and trunk of the trees were growing around the columns, like a spiral, it would maybe support the structures of the rock columns ?