@article{oai:lib.cku.repo.nii.ac.jp:00001525,
 author = {内山, 隆 and Uchiyama, Takashi},
 issue = {16},
 journal = {千葉経済大学短期大学部研究紀要, Bulletin of Chiba Keizai College},
 month = {Mar},
 note = {This study is based on the previous study（1） and focuses on the natural history around Choshi, Chiba Prefecture. The history of Holocene vegetation was recognized at four stages: herbaceous pollen consisting of deciduous and coniferous, mugwort （Artemisia） and grass （Gramineae）. The surrounding hills are covered with Kanto loam sediments containing dark humus and pollen fossils（2）. In this study, analyzed humus in loam sediments and extracted information on fossil pollen composition and 14C dating. Also, two pollen zones were recognized. The upper zone shows the grassland with fern since 2,000 yr. BP. The lower zone shows a simplified herb land consisting mainly Artemisia, Scabiosa, and Gentiana . However, there is a reversion between age and depth, and surface disturbances might cause the inconsistencies. In addition, the dating of the buried wood shows the age of the boundary period between 2 and 3 of MIS about 30,000yr BP, and the dating indicate a long-term sedimentary environment like lake at the hill area.},
 pages = {57--64},
 title = {千葉県銚子市名洗町周辺の自然史情報},
 year = {2020},
 yomi = {ウチヤマ, タカシ}
}