- Jun 29, 2008
It's amazing how trees can just appear to grow straight out of the rocks sometimes!
What happens is that, just like in rock, paper, scissors....paper wins against rock. A little soil accumulates on the rock, a seed lands there, and the tree starts to sprout. Believe it or don't, the roots just force their way into tiny fissures in the rock and apply hydraulic pressure....which eventually splits the rock. Pretty cool story about other helpers here: http://www.radiolab.org/story/from-tree-to-shining-tree/, which is REALLY mind-blowing. It's the same thing that happens with grass growing through pavement or concrete. Paper always wins - but only against rock.I know, at least here in NE I figure that ice has a lot to do with it. Each winter the ice cracks the rock a little more and each summer the trees fills in the cracks a little more.
That doesn't really explain how it happens in warmer places though...