Evidence of ameliorated Middle Weichselian climate and sub‐arctic environment in the western Baltic region: coring lake sediments at Klintholm, Møn, Denmark
Evidence of ameliorated Middle Weichselian climate and sub‐arctic environment in the western Baltic region: coring lake sediments at Klintholm, Møn, Denmark
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波罗的海西部地区中魏希塞尔气候和亚北极环境改善的证据：丹麦莫恩克林托姆湖沉积物取芯
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Lüthgens
中科院分区：
文献类型：
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作者：
M. Houmark‐Nielsen;O. Bennike;G. Lemdahl;C. Lüthgens
对位于丹麦莫恩岛海平面以下的冰川构造堆积的第四纪沉积物进行取芯，发现了一系列中魏希塞尔时代的层间沉积物。在层状沙子和泥土中发现的植物和动物遗骸（包括昆虫）表明它们沉积在一个被矮灌木、草本植物、苔藓和稀有树木包围的湖泊中。昆虫区系显示七月平均温度为 8–12 °C，表明存在北极至亚北极环境，而冬季温度约为 -8 至 -22 °C，表明存在永久冻土的冰缘条件。沉积物样品的发光测年给出了 48-29 ka 的年龄，放射性碳测年表明植物碎片的沉积年龄在 45 至 36 ka BP 之间。莫恩的化石组合与在波罗的海盆地西部附近发现的年龄相似的其他地点的化石非常相似。
Coring through glaciotectonically stacked Quaternary sediments situated below sea level on the island of Møn, Denmark, recovered a succession of interstadial sediments of Middle Weichselian age. Plant and animal remains including insects found in laminated sand and mud indicate deposition in a lake surrounded by dwarf shrubs, herbs, mosses and rare trees. The insect fauna indicates a mean July temperature of 8–12 °C, suggesting an arctic to sub‐arctic environment, while winter temperatures around −8 to −22 °C suggest periglacial conditions with permafrost. Luminescence dating of sediment samples gave ages from 48–29 ka, and radiocarbon dating indicates deposition of plant fragments between 45 and 36 ka BP. The fossil assemblage from Møn shows close resemblance to those from other sites with similar ages found in the vicinity of the western Baltic Basin.