@article{oai:nagoya.repo.nii.ac.jp:00012791,
 author = {吉田, 英一 and YOSHIDA, Hidekazu and 星野, 光雄 and HOSHINO, Mitsuo and 田中, 剛 and TANAKA, Tsuyoshi and 中村, 俊夫 and NAKAMURA, Toshio and 束田, 和弘 and TSUKADA, Kazuhiro and 齊藤, 毅 and SAITO, Takeshi and 桂田, 祐介 and KATSURADA, Yusuke},
 journal = {名古屋大学博物館報告},
 month = {Dec},
 note = {Euphrates f lood plain includes modern channels, oxbow lakes, banks and marshes, and contains of river terraces. These sedimentary phases of terraces are mainly unconsolidated dry silty to fine sand materials with poorly sorted gravels provided from the Bishiri Mountains. The study of sedimentary features is therefore enable us to know the environment of Tell Gahnem al- Ali had built. From the last field survey of terraces, we found many types of gypsum nodules in the soft terrace sediments. The size of nodule is about 1-2 cm diameter with several cm long. Sometimes, it has several tens cm grown vertically to the sedimentary layer and cross the bedding plane. The occurrence suggests that the nodule has been formed after the deposition of terrace sediments as following steps. First of all, the sediments deposited about several Ka ago. The age of sedimentation is estimated by the structural relation with Tell Gahnem al-Ali and the building process. Of course with the isotope carbon data, if available, would be shown more precise time of the building and sedimentation periods. After the deposition, sediments still has certain about of pore-water (wet) and the composition is presumably becoming very high contents of Ca. This is estimated by the present river water contents of Euphrates, and also the dissolution of gypsum that has provided from the basement rocks. During the compaction of continuing the terrace deposition, pore-water has been isolated and concentrated beyond the solubility limit of calcium. On the other hand, sediments contain also sulfate from the organic matters. Due to the diagenetic alteration such geochemical setting had formed, finally hydrous calcium sulfate has been precipitated and the nodule has been formed. It is however, the shape of nodule is quite unique, i.e. similar to the root plaque of plant growing in the flood plane, and that the precise formation is still necessary to analyze.},
 pages = {79--83},
 title = {シリア段丘に見られる石膏（Gypsum: CaSO4・2H2O）ノジュールの形成と環境についての一考察},
 volume = {26},
 year = {2010}
}