現世土壌の岩石学的記載 : 古土壌研究への応用の一例 Microscopic observations of the recent soils: a step for understanding the paleosols

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The microscopic observations of the recent soil horizons were conducted in Okayama, Japan (moderate climate). The several soil horizons, including two surface (epipedon) and three subsurface horizons, were recognized in the forest, poorly vegetated hill, and riverside around the Okayama University. The umbric epipedon can be segregated from the organic-rich subsurface horizons by the scattered organic materials in thin sections. The ochrich epipedon shows the sandy matrix without any cements and the illuviation ofclay minerals. The subsurface horizons identified in the study area are as follows: albic, argillic, and cambic horizons. Each subsurfacehorizon shows the specific structures in thin sections. The albic horizon is characterized by the absence of the illuviation. The argillic horizon definitely shows the clayey matrix and the illuviation of clay minerals. The primary structures may be retained in the cambichorizon.The microscopic examination of the Miocene paleosols from the Ukan-cho, Okayama, was attempted. By comparing the recent soils, the cambic horizon and spodic horizon, which is characterized by the concentration of sesquioxides, are identified in the paleosols. This attempt suggests that the microscopic observations of the recent soils is a useful guide to understanding the paleosols

収録刊行物

  • Okayama University Earth Science Report

    Okayama University Earth Science Report 15(1), 9-32, 2009-03-31

    岡山大学理学部地球科学教室

各種コード

  • NII論文ID(NAID)
    120002307964
  • NII書誌ID(NCID)
    AN10506284
  • 本文言語コード
    JPN
  • 資料種別
    departmental bulletin paper
  • ISSN
    1340-7414
  • データ提供元
    IR 
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