〔報告〕高松塚古墳発掘・解体作業に伴う生物調査の概要について [in Japanese] Overview of Biological Survey at Takamatsuzuka Tumulus during the Excavation and Relocation of the Stone Chamber in 2007 [in Japanese]
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The surface hardness of sandstone covered with mosses was compared with that of fresh sandstone at Ta Nei Site in the Angkor Complex, Cambodia. As a result, it was found that the hardness of sandstone after the removal of surface mosses is about 30 % less than that of fresh sandstone and even less than the hardness of sandstone covered with lichens. Polarizingmicroscopic observation was conducted on a sandstone covered with moss. It was revealed that the surface of that sandstone to a thickness of 1 mm is more porous than the rest, indicating that the surface is weathered. From these observations, it can be concluded that the existence of surface mosses indicates the surface weathering of the host rock, though it cannot beascertained which is the cause and which is the result. Therefore, the surrounding environment which allows luxuriant growth of mosses is regarded to be undesirable for the conservation of sandstone in this Site, even if the mosses do not actually accelerate weathering. Improvement of the surrounding environment of this Site, e.g. felling of trees for the reduction of relative humidity within the Site, would be an effective countermeasure.
- 保存科学 = Science for conservation
保存科学 = Science for conservation (47), 121-128, 2008-03-31