【红石滩上的红色是怎么形成的？】这些石头上的红色看起来像是铁锈，但其实不是！这是一种生长在四川省四姑娘山河床巨石上的红色苔藓。#旅游指南# #秘境穿越# What’s the red stuff on these rocks? It's not rust! It's actually a kind of red moss growing on the boulders in the riverbeds of Mount Siguniang in Sichuan Province, southwest China.