气候变化领域集成服务门户(CCPortal): High-resolution seismic stratigraphy of Late Pleistocene Glacial Lake Iroquois and its Holocene successor: Oneida Lake; New York

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DOI	10.1016/j.palaeo.2019.109286
	High-resolution seismic stratigraphy of Late Pleistocene Glacial Lake Iroquois and its Holocene successor: Oneida Lake; New York
	Zaremba N.J.; Scholz C.A.
发表日期	2019
ISSN	0031-0182
卷号	534
英文摘要	Oneida Lake, New York, is the remnant of Glacial Lake Iroquois, a large proglacial lake that delivered fresh water to the Atlantic Ocean during the last deglaciation. The formation of Glacial Lake Iroquois and its subsequent drainage into the Atlantic Ocean via the Mohawk Valley was a significant shift in the routing of Laurentide Ice Sheet meltwater to the east instead of south via the Allegheny or Susquehanna Rivers. Catastrophic drainage of Glacial Lake Iroquois into the Atlantic Ocean via the Champlain Valley is interpreted as the meltwater pulse responsible for the Intra-Allerod cold stadial. Therefore, understanding the evolution of Glacial Lake Iroquois has significant implications for understanding late Pleistocene paleoclimate. High-resolution CHIRP seismic reflection data provides insight into the evolution of Glacial Lake Iroquois and Oneida Lake. Three seismic units image distinct stages of the Oneida Basin. Unit 1 is interpreted as proglacial lake deposits that overlie glacial till. Unit 2 is interpreted as sediments deposited when the Oneida Basin became isolated from Glacial Lake Iroquois and Unit 3 is interpreted as lacustrine sediments of the modern lake. Distally sourced turbidites possibly triggered by seismic activity or ice sheet meltwater pulses are represented as reflection-free acoustic facies that infill topographic lows and range in thickness from ~1–5 m within otherwise conformable proglacial lake deposits. Local slump deposits imaged at the boundary between Unit 1 and 2 were likely triggered by the drainage of Glacial Lake Iroquois. Wave cut terraces indicative of a low stand on the upper bounding surface of Unit 2 are likely the result of drier conditions during the Holocene Hypsithermal. Furthermore, preservation of this low stand suggests a rapid rise in lake level, possibly the result of the same transition to a wetter climate responsible for the Nipissing transgression observed in the Laurentian Great lakes. © 2019 Elsevier B.V.
英文关键词	Holocene Hypsithermal; Intra-Allerod; Laurentide ice sheet; Meltwater pulse; Mohawk Valley; Proglacial lake deposits
语种	英语
scopus关键词	Allerod; glacial lake; Holocene; Hypsithermal; lacustrine deposit; Laurentide Ice Sheet; meltwater; Pleistocene; seismic reflection; seismic stratigraphy; Atlantic Ocean; Champlain Valley; Mohawk Valley; New York [United States]; Oneida Basin; Oneida Lake; United States
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150806
作者单位	Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, United States
推荐引用方式 GB/T 7714	Zaremba N.J.,Scholz C.A.. High-resolution seismic stratigraphy of Late Pleistocene Glacial Lake Iroquois and its Holocene successor: Oneida Lake; New York[J],2019,534.
APA	Zaremba N.J.,&Scholz C.A..(2019).High-resolution seismic stratigraphy of Late Pleistocene Glacial Lake Iroquois and its Holocene successor: Oneida Lake; New York.Palaeogeography, Palaeoclimatology, Palaeoecology,534.
MLA	Zaremba N.J.,et al."High-resolution seismic stratigraphy of Late Pleistocene Glacial Lake Iroquois and its Holocene successor: Oneida Lake; New York".Palaeogeography, Palaeoclimatology, Palaeoecology 534(2019).