Moss and Algae

The rock surface is colonized by moss and algae (lichen). Though most algae are so tiny that they cannot be recognized by naked eye, lichen plays an important role in the development of stone forest. Lichen not only darkens the rock in color but also contributes to the micro-morphological feature of the rock, producing many tiny solution pits and hollows on the rock surface as a result of organic acid related bio-solution process.