气候变化领域集成服务门户(CCPortal): Holocene history of Lake of the Woods: Ontario, Manitoba, and Minnesota

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DOI	10.1130/B31790.1
	Holocene history of Lake of the Woods: Ontario, Manitoba, and Minnesota
	Teller J.T.; Rühland K.M.; Smol J.P.; Mellors T.J.; Paterson A.M.
发表日期	2018
ISSN	167606
起始页码	3
结束页码	23
卷号	130 期号:2021-01-02
英文摘要	Lake of the Woods is one of North America's largest lake complexes, covering an area of ~4000 km2 in Ontario, Manitoba, and Minnesota. Multiple proxies and 38 new accelerator mass spectroscopy (AMS) radiocarbon dates from six sediment cores in the basin were used to interpret the Holocene paleoenvironmental history of Lake of the Woods, including the late history of glacial Lake Agassiz. Sediments cored consist mainly of lacustrine silty clay to clayey silt. A distinct pink lamina in one core is associated with overflow into Lake Agassiz from the Superior basin related to the Marquette readvance of the Laurentide Ice Sheet 11,300 cal (9900 14C) yr B.P. Pedogenic zones developed in the sediment reflect periods when the lake floor was dry and exposed to weathering, specifically (1) during an initial phase after the Lake of the Woods basin became isolated from Lake Agassiz ca. 10,500-10,000 cal yr B.P. but before differential isostatic rebound caused water in the northern end of the basin to transgress south over the exposed lake floor, and (2) during a 3600-yr-long negative hydrological budget and chronological hiatus related to the mid- Holocene Hypsithermal warming and drying event, which is represented by < 1 m of sediment. Diatoms first appear in the record after the Lake of the Woods became separated from Lake Agassiz shortly after 10,500 cal yr B.P. Ostracodes are present in sediments as young as ca. 7600 cal yr B.P., disappearing above the uppermost pedogenic zone; thecamoebians first appear after this. Distinct shifts in diatom assemblage composition and in sedimentary chlorophyll-a in one core track late Holocene changes in Lake of the Woods. © 2017 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185101
作者单位	Department of Geological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; Paleoecological Environmental Assessment and Research Laboratory (PEARL), Department of Biology, Queen's University, Kingston, ON K7L 3N6, Canada; Dorset Environmental Science Centre, Ontario Ministry of the Environment and Climate Change, Dorset, ON P0A 1E0, Canada
推荐引用方式 GB/T 7714	Teller J.T.,Rühland K.M.,Smol J.P.,et al. Holocene history of Lake of the Woods: Ontario, Manitoba, and Minnesota[J],2018,130(2021-01-02).
APA	Teller J.T.,Rühland K.M.,Smol J.P.,Mellors T.J.,&Paterson A.M..(2018).Holocene history of Lake of the Woods: Ontario, Manitoba, and Minnesota.Bulletin of the Geological Society of America,130(2021-01-02).
MLA	Teller J.T.,et al."Holocene history of Lake of the Woods: Ontario, Manitoba, and Minnesota".Bulletin of the Geological Society of America 130.2021-01-02(2018).