Detail of Grant Awarded Academic Researches
Comprehensive study of the Pliocene Kazusa Group along the Tamagawa River, Tokyo, and revision of geological teaching developments based on their studies.
(at that time)
|Professor, Tokyo Gakugei University,|
To confirm the eastern distribution of the Kazusa Group exposed in the Tama Hill and a river floor of the Tamagawa River, we expanded the study area to below the Musashino-daichi and Tokyo low land using drill cores. Then, we studied the litho-stratigraphy of the Kazusa Group and the geological correlation of the group among those areas. Sedimentary environments of the Kazusa Group in those areas were reconstructed by sedimentary facies analysis, resulting in a new solution to the age of the tephra in contrast to previous studies. Based on characters of molluscan assemblages, paleo-depth of Pliocene basin of the areas was estimated, and the influence of warm and cold currents in these areas, as well as the stratigraphic changes were analyzed. Then, the influence of the results caused by the Glacial Sea level changes were discussed. To check their influence in land area, we also studied Palynostratigrahy of the Kazusa Group in the Tama Hill and a river floor of the Tamagawa River. And we presented updated outcrops of the Kazusa Group in those areas. We mentioned that a site on a river bed of the Tachikawa and Hino area is the best site for teaching field geology, and reported its study results for middle school and for teacher’s workshop.
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