1. Introduction 2. Basic knowledge of geochemical processes 3. Sedimentology of travertine 4. Methods 5. Geomicrobiologial processes for laminated textures 6. Geochemical model for rapid carbonate precipitation of travertines 7. Travertines in Japan 7.1. Futamata 7.2. Okuokuhachikuro 7.3. Yunomata 7.4. Shionoha 7.5. Kibedani 7.6. Nagayu 7.7. Anraku 7.8. Shiobitashi 8. Concluding remarks ukryj opis