Distribution of Subclimax Grassland in Fossa Magna. : 2. The tableland of Kirigamine and the volcanos of north Fossa Magna

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  • フオッサマグナおよびその周辺の草原草地の立地 : 2. 霧ヶ峰と上信越火山群など
  • フオッサマグナ オヨビ ソノ シュウヘン ノ ソウゲン ソウチ ノ リッチ 2

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Abstract

This paper deals with the including the tableland of Kirigamine and Utsukushigahara and the volcanos of Joshin-etsu. The area corresponds to the largest diastrophic zone in Japan, and is situated mainly on lava rocks formed by Fossa Magna. The tablelands of Kirigamine and Utsukushigahara originate from largescale pyroclastic lava flows. The rocks have good water permeability, and therefore the decrease in the available water established the grasslands of this area. The grasslands have been used jointly by community farmers as native or sown pastures, without beingprivately-owned and cultivated for forage crops. This contrasts with the fact that most of the Japanese grasslands are located on volcanic ashs have been developed by privately-owned farms that intensively utilize sown pastures and forage crops for dairying orcultivate grain crops and vegetables.

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