exfoliation of huge granite rock

air moss pulau outer landscape warm nature woods water bare shrubs jungle exfoliation shedding boulder peeling quarry fractures skin oxygen weathering oxidation plants resistant algae grass igneous hairline tropical forest trees vines oxidised huge green discolouration singapore due ground erosion moist ubin rock moisture fault granite natural greenery changes hard brown vegetation temperature cracks space exfoliating damp humid hot exposed iron rainforest layers lines onion ferns