Bolson (English spelling)

Japanese: ボルソン(英語表記)bolson
Bolson (English spelling)
A basin surrounded by mountains found in arid regions from the western United States to Mexico. Because it is an inland drainage basin where the flowing water does not reach the sea, a playa is formed in the center. Although some are formed by wind erosion, most are basins formed by fault movement. As a result, active erosion in the surrounding mountains produces a large amount of gravel, which fills the bolson. In the early stages of the formation of the bolson, many alluvial fans are formed in the surrounding foothills.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
アメリカ西部からメキシコにかけての乾燥地域に見られる山地に囲まれた盆地。流水が海まで到達しない内陸流域となっているため,その中央部にはプラヤが形成されている。まれに風食により形成されたものもあるが,大部分は断層運動により形成された盆地である。そのため,周囲の山地での浸食が活発なため大量の砂礫が生産され,ボルソンはこの砂礫により埋積されていく。ボルソンが形成された初期には,その周辺の山麓部にたくさんの扇状地が形成される。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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>>:  Borzoi [species] (English spelling)

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