|KEY WORD : architecture / general terms|
or tufa. Popularly called shoukouseki 松香石. A porous stone composed
of volcanic ash or from the material loosened by the gradual disintegration
of rock or rock debris formed from material deposited by waterways. It is
soft, easy to shape, light and fire resistant. It was commonly used for
making the slabs to cover the mounds made for the podii *kidan
基壇 on which temple or shrine buildings were erected. Mt. Futakami 二上 in
Nara was the source of much of this rock until the mid-Heian period. Examples: Houryuuji *Kondou
法隆寺金堂 and *Gojuu-no-tou
五重塔 (late 7 to early 8c), Nara.
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