Resolving the chronology of recent lake sediments: an example from Devils Lake, North Dakota

Heather A. Jacobson; Daniel R. Engstrom

doi:10.1007/BF00177042

Resolving the chronology of recent lake sediments: an example from Devils Lake, North Dakota

Heather A. Jacobson, Daniel R. Engstrom

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Abstract

Devils Lake is a closed, saline lake in North Dakota; it is typical of lake basins in the Great Plains Region, where windy conditions and fluctuating water-levels disturb sediment and confound chronostratigraphy. Pollen analysis and ²¹⁰Pb dating of two cores collected from bathymetrically contrasting embayments demonstrate (1) how certain agriculture-related pollen types differ in their value as chronostratigraphic markers, (2) how pollen and ²¹⁰Pb stratigraphies can be reconciled to determine the approximate depth of sediment mixing, and (3) the importance of coring-site selection, especially in lakes with unstable sedimentary conditions.

Original language	English (US)
Pages (from-to)	81-97
Number of pages	17
Journal	Journal of Paleolimnology
Volume	2
Issue number	2
DOIs	https://doi.org/10.1007/BF00177042
State	Published - Jun 1 1989

Keywords

Pb dating
chronostratigraphy
North Dakota
pollen analysis
Salsola iberica

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title = "Resolving the chronology of recent lake sediments: an example from Devils Lake, North Dakota",

abstract = "Devils Lake is a closed, saline lake in North Dakota; it is typical of lake basins in the Great Plains Region, where windy conditions and fluctuating water-levels disturb sediment and confound chronostratigraphy. Pollen analysis and 210Pb dating of two cores collected from bathymetrically contrasting embayments demonstrate (1) how certain agriculture-related pollen types differ in their value as chronostratigraphic markers, (2) how pollen and 210Pb stratigraphies can be reconciled to determine the approximate depth of sediment mixing, and (3) the importance of coring-site selection, especially in lakes with unstable sedimentary conditions.",

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AB - Devils Lake is a closed, saline lake in North Dakota; it is typical of lake basins in the Great Plains Region, where windy conditions and fluctuating water-levels disturb sediment and confound chronostratigraphy. Pollen analysis and 210Pb dating of two cores collected from bathymetrically contrasting embayments demonstrate (1) how certain agriculture-related pollen types differ in their value as chronostratigraphic markers, (2) how pollen and 210Pb stratigraphies can be reconciled to determine the approximate depth of sediment mixing, and (3) the importance of coring-site selection, especially in lakes with unstable sedimentary conditions.

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KW - pollen analysis

KW - Salsola iberica

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Resolving the chronology of recent lake sediments: an example from Devils Lake, North Dakota

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