A general term for fossil plants found in the Pleistocene (Pleistocene) fossil lake deposits distributed in Shiobara Town, Nasu County, Tochigi Prefecture. In 1940, Endo Seido revealed almost the entire structure. Most of the fossils are deciduous broadleaf angiosperms, including alder, birch, hornbeam, beech, rowan, maple, and linden. The majority of the fossil species are the same as those that grow around the area today, and more than 100 species have been identified to date. Endo thought that the Shiobara flora grew in a climate with an annual average temperature 5 to 5.5 degrees Celsius lower than today, but recent research has shown that the temperature when the Shiobara flora flourished was not much different from today. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
栃木県那須郡塩原町に分布する洪積世(更新世)の化石湖堆積物中に含まれる化石植物の総称。1940年遠藤誠道によってそのほぼ全体のようすが明らかにされた。化石はその大部分が被子植物の落葉広葉樹で,そのおもなものは,ハンノキ,カバ,シデ,ブナ,ナナカマド,カエデ,シナノキなどである。また化石種の大部分は,現在この地のまわりに生育しているものと同種で,現在までに100種をこえる種が識別されている。塩原植物群は,現在よりも年平均気温が5~5.5℃ほど低い気候下で生育したものと遠藤は考えたが,ごく最近の研究によれば,塩原植物群が繁茂していたころの気温は現在と大差がないという。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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