Topography and morphometry of Lake Bo-ga-ike in Niigata Prefecture, Central Japan
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概要
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Bo-ga-ike is a small lake that lies at the northern foot of the Sekida mountain range, Niigata Prefecture. This lake is conspicuous that its maximum depth of 28 m. is so great for 0.15 sq. km. in its superficies. The bathymetric map of this lake basin together with its morphometric data are shown in Fig. 2 and Table 1. The assumption that this lake is volcanic in origin is difficult to accept immediately, because it is surrounded by Tertiary tuffaceous sand- and mud-stones. However, the results recently obtained, that there were found the volcanic ejects consisting of pyroxene andesite in the area around the lake and that were shown by the topographic observations, have made the writer to suggest that this basin is a maar in its origin.
- 日本陸水学会の論文
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