地域の地質を活かした河原の礫の学習材としての展開試案 : 広島県福山地域を例として

A Tentative Plan to Use River Bed Gravels as Teaching Materials on the Basis of Regional Geology : In the Case of Fukuyama Area

下久吉 博宣

山崎 博史

学校教育実践学研究

Hiroshima journal of school education

[ISSN] 1341-111X

[NCID] AN10491493

Gravels are considered to be one of the most popular materials for teaching agency of water, that is, erosion, transportation, and deposition. Based on the composition, shape and size of gravels in the fluvial deposits, we can estimate the geology of the source area. The Fukuyama Formation, that is distributed in and around Fukuyama, Hiroshima Prefecture, is characterized by fluvial gravels. The composition and size of gravels from the Fukuyama Formation and recent river deposits are studied. The gravels from the Fukuyama Formaion is mostly composed of rhyolite, but those from recent river deposits contains both rhyolite and clastic rocks at the almost same rate. The difference in the gravel composition shows the change of distribution of rocks in the source area during the geologic time. It will be a good teaching material for getting the general ideas of the time and the space to consider the meaning of the difference.

教育 [ 370 ]

日本語

広島大学大学院教育学研究科附属教育実践総合センター

[ISSN] 1341-111X

[NCID] AN10491493