- 著者
-
Hideo YAMANOUCHI
- 出版者
- The Association of Japanese Geographers
- 雑誌
- Geographical review of Japan, Series B (ISSN:02896001)
- 巻号頁・発行日
- vol.71, no.1, pp.72-82, 1998-06-30 (Released:2008-12-25)
- 参考文献数
- 32
- 被引用文献数
-
7
10
In the Ryukyu Island Arc, bioclastic sands containing foraminifera, e. g. Baculogypsina and Calcarina with spines on their tests, are abundant in sands of beaches and reefs. Attrition of the spines of Baculogypsina and Calcarina clarifies habitat and dispersion of these foraminifera at Yoshihara reef in Ishigakijima, where water flow clearly exists due to a distinct channel in the reef flat. At Sesokojima reef where no distinct channel exists, the method of using the attrition of spines on these bioclastic sands is applicable for evaluating transport courses of the bioclastic sands. This method provides a clue to elucidate gain and loss of beach sands in reefal coasts of the Ryukyu Island Arc.