Abstract
Hot spring sinter deposits are composed of mineral components, and the composition is determined to reflect the characteristics of the mother liquor, and form of the sinter reflects the environmental conditions. In this paper, the sinter with a peculiar morphology occurred at a sulfer spring was analyzed by a polarized light microscopy and X-ray diffraction method. As a result, it was found that gypsum crystals and mainly with the irregular direction and amorphous outlines of crystallites. This unique morphology can be explained by the Fractal growth. However, sediment deposits formed in the Earth surface rather than deep underground, some organisms are known to be involved in the formation. Therefore, their relationship is needed to considered, and a short review was described.
