大和高原･都介野盆地の完新統の花粉分析

概要

論文の詳細を見る
Since 1977 we have intended to clarify a Holocene vegitational change concerning to archaeological researches in and around Nara Basin. We approached it mainly with geological and palynological methods. This time we attempted a palynologial investigation on five short geological columnar samples obtained from Tsugeno Basin with a hand auger technique. These samples consisted of sand, mud and gravelous materials with intercalation of peaty sediment. 14C dates measured on peaty sediments gave the age ranging from ca. 5,000y.B.P. to modern time. On these columns we distinguished three pollen assemblage zones, namely I Quercus, II Cyclobalanopsis and III Pinus Zones in ascending order. Quercus Zone suggests warm temperate ecotone forest in early to middle Holocene time. Cyclobalanopsis Zone shows the climax condition of laurel forest in middle to late Holocene. Pinus Zone indicates artificial effects against natural forest. Present vegitational results are concordant with the reports from Tawara and Nara Basins and from Muro Mountainland.
奈良教育大学の論文
1983-11-25