NDLI: Late Quaternary paleoenvironments of an ephemeral wetland in North Dakota, USA: relative interactions of ground-water hydrology and climate change

Content Provider	Springer Nature Link
Author	Yansa, Catherine H. Dean, Walter E. Murphy, Edward C.
Copyright Year	2007
Abstract	This study of fossils (pollen, plant macrofossils, stomata and fish) and sediments (lithostratigraphy and geochemistry) from the Wendel site in North Dakota, USA, emphasizes the importance of considering ground-water hydrology when deciphering paleoclimate signals from lakes in postglacial landscapes. The Wendel site was a paleolake from about 11,500 $^{14}$C yr BP to 11,100 $^{14}$C yr BP. Afterwards, the lake-level lowered until it became a prairie marsh by 9,300 $^{14}$C yr BP and finally, at 8,500 $^{14}$C yr BP, an ephemeral wetland as it is today. Meanwhile, the vegetation changed from a white spruce parkland (11,500 to 10,500 $^{14}$C yr BP) to deciduous parkland, followed by grassland at 9,300 $^{14}$C yr BP. The pattern and timing of these aquatic and terrestrial changes are similar to coeval kettle lake records from adjacent uplands, providing a regional aridity signal. However, two local sources of ground water were identified from the fossil and geochemical data, which mediated atmospheric inputs to the Wendel basin. First, the paleolake received water from the melting of stagnant ice buried under local till for about 900 years after glacier recession. Later, Holocene droughts probably caused the lower-elevation Wendel site to capture the ground water of up-gradient lakes.
Starting Page	441
Ending Page	457
Page Count	17
File Format	PDF
ISSN	09212728
Journal	Journal of Paleolimnology
Volume Number	38
Issue Number	3
e-ISSN	15730417
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-04-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate Ground water Pollen Plant macrofossils Geochemistry North Dakota Geology Hydrobiology Physical Geography Climate Change Sedimentology Environment
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Aquatic Science

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