@article{oai:doshisha.repo.nii.ac.jp:00024009,
 author = {増田, 富士雄 and Masuda, Fujio and 糸本, 夏実 and Itomoto, Natsumi and 小川, 和宏 and Ogawa, Kazuhiro and 櫻井, 皆生 and Sakurai, Minao and 趙, 哲済 and Cho, Chul-jae},
 issue = {2},
 journal = {同志社大学ハリス理化学研究報告, The Harris science review of Doshisha University},
 month = {Jul},
 note = {島弧間盆地である大阪堆積盆の河内平野の地下の最後期更新統から完新統の"沖積層"についてその特徴を明らかにした．この地層は20〜30ｍの層厚を有し，4つのユニット，すなわち下位から上位へ最下部礫層，下部砂泥互層，中部海成粘土層，上部砂泥層に区分できる．中部の海成粘土層は陸域にむかってくさび状に分布する．これらの地層区分や分布はわが国の沿岸域の沖積層の典型である．最下部の礫層は河川や扇状地性で，3万年前から1万年前の氷期の低海面期に古大和川や淀川の谷を埋積している．下部の砂泥互層は1万年前から8千年前の後氷期の海進に伴って溺れ谷の河口に堆積したものである．中部の海成粘土層は8千年前から3千年前の高海面期（最高海面期は約5千3百年前）に，河内湾で海成侵食ラビーンメント面上に堆積した泥干潟や内湾泥底の厚い堆積物である．上部砂泥層は3千年前から現在までに臨海扇状地や三角州や海岸などで形成された堆積物である．この中で河内湾における特徴的な堆積相は，厚い海進期の泥干潟の堆積物である．, Geological characteristics of the latest Pleistocene to Holocene "Chuseki-so" beneath the Kawachi Plain in the intra-arc Osaka Basin, central Japan were clarified. The strata, which have a total thickness of 20 to 30 m, are divided into four units: lowermost gravel, lower alternation of sand and mud; middle marine clay; and upper sand and mud, in ascending order. The middle marine clay is a wedge-shaped bed that thins landward. These stratigraphic divisions and their distribution are typical of Chuseki-so in coastal areas of Japan. The lowermost gravel consists of fluvial or alluvial fan deposits, which filled in the valleys of the Paleo-Yamato River and the Yodo River during the glacial sea-level lowstand, from about 30,000 to 10,000 cal yr BP. The lower alternation of sand and mud consists of estuarine sediments in the drowned valley, which were deposited during the deglacial transgressive period of 10,000 to 8,000 cal yr BP. The middle marine clay bed, which immediately overlies a marine erosional ravinement surface, consists of thick tidal mud-flat deposits and thin bay-floor mud deposited in Kawachi Bay during the sea-level highstand from 8,000 to 3,000 cal yr BP (period of maximum flooding is about 5,300 cal yr BP). The upper sand and mud are composed of fan-delta, delta, and coastal sediments deposited during the highstand and subsequent regression from 3,000 to 0 cal yr BP. The thick transgressive mud-flat deposit is a characteristic key facies in this Kawachi Bay area., application/pdf},
 pages = {88--98},
 title = {大阪,河内平野の沖積層の特徴},
 volume = {57},
 year = {2016},
 yomi = {マスダ, フジオ and イトモト, ナツミ and オガワ, カズヒロ and サクライ, ミナオ and チョウ, テッサイ}
}