Fossil pollen and spore assemblages of the last glacial age from the eastern part of the Konsen plateau, eastern Hokkaido.
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- IGARASHI Yaeko
- Department of Geology and Mineralogy, Faculty of Science, Hokkaido University
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- MIYATA Yuichiro
- Environmental Geology Department, Geological Survey of Japan
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- NOI Hideaki
- Department of Geology, Faculty of Science, Kyusyu University
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- YAMADA Osamu
- Kyoto Sangyo University
Bibliographic Information
- Other Title
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- 北海道根釧台地東縁部から得られた最終氷期の花粉化石群
- ホッカイドウ コンセン ダイチ トウエンブ カラ エラレタ サイシュウ ヒョウ
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Description
The tephra and peat beds distributed at Tokotan and Honbekkai in the eastern margin of the Konsen Plateau, Eastern Hokkaido, were investigated by tephra stratigraphy, pollen analysis, and 14C datings. The peat layers of Tokotan Loc. 1 were estimated to date from the late stage of the Last Glacial Age. Four pollen zones were discriminated there. The lowest zone, TK-I, about 36, 000y. B. P., is characterized by high pollen percentages of Picea coexisting with Larix and Abies. Zone TK-II is characterized by high Larix, Betula, Alnus, and herbs. Zone TK-III, a little older than 32, 000y. B. P. in age, is dominated by Picea. The uppermost zone, TK-IV, is estimated at about 32, 000y. B. P. based on the existence of Nl-a and Spfa-l, and it has high percentages of Larix, Picea and herbs. During the formation of these 4 zones, there could be subarctic forests (zones TK-I and TK-III) and subarctic open forests (zones TK-II and TK-IV) dominated by larch and/or spruce on bogs. Generally, the climatic conditions of zones TK-I-IV was colder and drier than at present, especially in zone TK-II, and less so in zone TK-III.
Journal
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- The Quaternary Research (Daiyonki-Kenkyu)
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The Quaternary Research (Daiyonki-Kenkyu) 29 (2), 131-138, 1990
Japan Association for Quaternary Research
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Details 詳細情報について
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- CRID
- 1390282681473975168
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- NII Article ID
- 130001563283
- 10009663572
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- NII Book ID
- AN0034136X
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- ISSN
- 18818129
- 04182642
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- NDL BIB ID
- 3676491
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed