膨胀条带与压缩条带相反，孔隙度明显大于周围岩石，发生在垂直于最小主应力方向上，并与剪切条带共生。
On the contrary, the porosity of dilation bands is quite bigger than the surrounding rocks. Thus dilation bands are perpendicular to the minor principal stress, accompanied by shear bands.
地衣，共生的有机体结合起来，真菌和藻类，可以是有力风化的动因和力量，所分泌的化学物质称为螯合物那造成岩石的破裂。
Lichens, symbiotic organisms that combine fungi and algae, can be powerful weathering agents, secreting chemicals called chelates that work to break down rock.
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