Formation processes of stromatolites reconstructed from modern analogs(<Special issue>the deep structure and tectonic processes of inland basins, central Japan)

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  • OKUMURA Tomoyo
    Japan Agency for Marine-Earth Science & Technology, Laboratory of Ocean-Earth Life Evolution Research (OELE)

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  • 現世試料から解き明かされるストロマトライトの成因(<特集>地球史統合科学)
  • 現世試料から解き明かされるストロマトライトの成因
  • ゲンセイ シリョウ カラ トキアカサレル ストロマトライト ノ セイイン

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Stromatolites are laminated sediments that have been developed since 3.5 Ga, and appeared almost throughout the Earth's history. It has been suspected that the lamination of stromatolites was basically associated with cyanobacteria. However, the ancient specimens very rarely preserve microbes and relics of organic bodies that could provide information for understanding the formation processes of the stromatolites. On the other hand of the geological researches, studies on the modern analogs has provided new insights into the processes of the stromatolite formation since 1990s. This study reviews previous researches on the modern analogs in different settings (shallow marine, lakes, rivers, hot-springs, and anoxic water) where the comparable laminated sediments are formed, and finally suggests the directions of the future stromatolite studies.

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