Deglaciation and Postglacial Vegetation History of the West Mountains, West-central Idaho, U.S.A.
Deglaciation and Postglacial Vegetation History of the West Mountains, West-central Idaho, U.S.A.
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美国爱达荷州中西部西部山脉的冰消期和冰期后植被历史
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
P. Carrara
中科院分区：
文献类型：
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作者：
James P. Doerner;P. Carrara
爱达荷州中西部的西部山脉在大约公元前11,500年前已经冰川消融，这是由放射性碳年龄和冰川峰顶冰盖所表明的，在环形地带的几个地点。对沉积物核心的花粉分析，以及从Van Wyck Creek源头的圆圈中发现的植物大型化石表明，大约在11500到9800年前，该地点周围是一片封闭的云杉-松林。在这一时期的早期，云杉(可能是克鲁姆霍尔茨)已经生长在接近今天直立云杉的高度极限。因此，这一时期的气候明显比公元前11500年前温暖。大约在公元前9800到3200年之间，气候比现在温暖和干燥。孢粉数据表明，来自中国大陆的。
The West Mountains, west-central Idaho, were deglaciated before ca. 11,500 BP, as indicated by radiocarbon ages and Glacier Peak tephra, at several sites in cirques. Pollen analysis of a sediment core, and plant macrofossils from sediments recovered from the cirque at the head of Van Wyck Creek, indicate that a closed spruce-pine forest surrounded the site from ca. 11,500 to 9800 BP. Early in this period, spruce (probably krummholz) was already growing near the present-day altitudinal limit of large upright spruce. Hence, the climate during this period was significantly warmer than before 11,500 BP. Between ca. 9800 and 3200 BP the climate was warmer and drier than present. Pollen data indicate that from ca.