著者

小元 久仁夫 大村 纂

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.124, no.1, pp.127-135, 2015-02-25 (Released:2015-03-11)

参考文献数

22

被引用文献数

3

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The Rhone Glacier is the best-documented case in the Alps of a rapidly retreating glacier. Photographs and other documents show the history of the changing glacier since the Little Ice Age. Fluctuations of the glacier tongue reflect decadal temperature fluctuations during the observation period. The last quarter century witnessed the most spectacular retreat, resulting in the development of a glacier lake. The pro-glacial lake has increased rapidly in size to the extent that the Swiss Federal Office of Cartography and Survey has given it the official geographical name of “Rhonesee”. The major stages of the Rhone Glacier are presented in this article with selected photographs and figures.

著者

小元 久仁夫

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.131, no.1, pp.115-121, 2022-02-25 (Released:2022-03-14)

参考文献数

1

被引用文献数

1 1

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Geologists, petrologists, geomorphologists, botanists and ecologists often collect samples through field surveys. They are required to obtain permission from the Ministry of the Environment before collecting samples in a special zone and a marine park zone of a national park. For example, permission is necessary for sampling prior to mining minerals or quarrying soil and stones in such zones. A legal procedure is introduced that is required to be followed before taking samples for AMS 14C dating in Keramashoto National Park, Okinawa.

著者

小元 久仁夫

出版者

公益社団法人 日本地理学会

雑誌

地理学評論 Series A (ISSN:18834388)

巻号頁・発行日

vol.87, no.3, pp.267-275, 2014-05-01 (Released:2019-10-05)

参考文献数

33

被引用文献数

1 2

著者

小元 久仁夫

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.121, no.6, pp.xiv-xiv, 2012-12-25 (Released:2013-01-07)

著者

小元 久仁夫

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.121, no.6, pp.1043-1051, 2012-12-25 (Released:2013-01-07)

参考文献数

36

被引用文献数

4

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A large number of coral boulders are scattered on reef flats and along the shores of Sakishima Islands, SW of Japan. Many were considered to have been cast ashore by huge tsunamis. In this report the author analyzes the distribution and calibrates the 14C ages of coral boulders collected from Maibahbama, southeast of Miyako Island. The calibrated 14C ages indicate a random distribution; however, some coincided exactly with the 1771 Meiwa tsunami. The tsunami travelled from the epicenter northeast and struck the Higashihenna Promontory, then turned westward leaving a large numbers of coral boulders on Maibahbama. Judging from tsunami deposits overlaying the lowest marine terrace the wave height seems not to have exceeded 10m.