TY - JOUR
T1 - Microbial processes forming daily lamination in a stromatolitic travertine
AU - Takashima, Chizuru
AU - Kano, Akihiro
N1 - Funding Information:
We thank Prof. Henry Chafetz and Prof. Brian Jones for providing constructive comments that improved the manuscript. We are grateful to Yoshihiro Shibata for the EPMA analysis and Hayami Ishisako for preparing thin sections. We thank Hiroshima University students who helped us with the 30-h observation. Various supports were kindly given by the owner of Yamabato-yu and his family. This study was supported by a grant-in-aid from the Japanese Ministry of Education and Science.
PY - 2008/8/1
Y1 - 2008/8/1
N2 - Thirty-hour continuous observation revealed that cyanobacterial metabolism caused daily lamination of a stromatolitic travertine in the Shionoha hot spring, SW Japan. The travertine is mainly composed of dendritic calcite crystals intercalated with bands of micritic particles at sub-millimeter intervals. Cyanobacteria remained in the spaces between the calcite crystals during the daytime, rose to the travertine surface to receive illumination as light decreased and formed a biofilm around sunset. A micritic band developed on the biofilm where glutinous substances trapped detrital ferrihydrite-rich particles transported from upcurrent. The trapped particles covered the biofilm, and in-situ precipitation of calcite crystals became dominant before mid-night. The depositional model of daily lamination of the Shionoha travertine may provide insight into the poorly understood origins and depositional rate of ancient stromatolites.
AB - Thirty-hour continuous observation revealed that cyanobacterial metabolism caused daily lamination of a stromatolitic travertine in the Shionoha hot spring, SW Japan. The travertine is mainly composed of dendritic calcite crystals intercalated with bands of micritic particles at sub-millimeter intervals. Cyanobacteria remained in the spaces between the calcite crystals during the daytime, rose to the travertine surface to receive illumination as light decreased and formed a biofilm around sunset. A micritic band developed on the biofilm where glutinous substances trapped detrital ferrihydrite-rich particles transported from upcurrent. The trapped particles covered the biofilm, and in-situ precipitation of calcite crystals became dominant before mid-night. The depositional model of daily lamination of the Shionoha travertine may provide insight into the poorly understood origins and depositional rate of ancient stromatolites.
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U2 - 10.1016/j.sedgeo.2008.06.001
DO - 10.1016/j.sedgeo.2008.06.001
M3 - Article
AN - SCOPUS:48349146712
SN - 0037-0738
VL - 208
SP - 114
EP - 119
JO - Sedimentary Geology
JF - Sedimentary Geology
IS - 3-4
ER -