| Title | Holocene eolian sand deposition linked to climatic variability, Northern Great Plains, Canada |
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| Author | Wolfe, S A ; Lian,
O B; Hugenholtz, C H; Riches, J R |
| Source | The Holocene vol. 26, issue 1, 2016, 15 pages, https://doi.org/10.1177/0959683616670223 |
| Image |  |
| Year | 2016 |
| Alt Series | Earth Sciences Sector, Contribution Series 20160205 |
| Publisher | SAGE Publications |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Manitoba; Saskatchewan; Alberta |
| Area | Bigstick Sand Hills; Seward Sand Hills; Northern Great Plains |
| Lat/Long WENS | -112.0000 -100.0000 54.0000 49.0000 |
| Subjects | surficial geology/geomorphology; eolian deposits; dunes; proglacial deposits; sands; lake sediment cores; core samples; lacustrine deposits; deposition |
| Illustrations | location maps; graphs; tables; satellite images |
| Released | 2016 10 07 |
| Abstract | The Bigstick and Seward Sand Hills are possibly two of the oldest dune fields within the late Wisconsin glaciated regions of the Northern Great Plains. As with most Northern Great Plains dune fields,
source sediments are former proglacial outwash sands. Thus, Holocene dune construction is primarily related to spatial-temporal variations in surface cover and transport capacity, rather than renewed sediment input. However, eolian landscape
reconstructions on the Northern Great Plains have been temporally constrained to recent periods of activity, as older episodes of deposition are typically reworked by younger events. In this study, sediment cores from shallow lacustrine basins and
interdune areas provide an improved record of Holocene eolian sand deposition. Eolian sand accumulation in the interdunes and basins occurred between 150 and 270 years ago, 1.9 and 3.0 ka, 5.4 and 8.6 ka, and prior to ca. 10.8 ka. These episodes of
sand accumulation were bracketed by lacustrine deposition and soil formation, which represented wetter conditions. Other than mid-Holocene dune activity, which may be related to peak warmth and aridity, most periods of eolian sand accumulation
coincided with cooler but drier climatic events such as the Younger Dryas, late-Holocene cooling prior to the Medieval Climatic Anomaly, and the ''Little Ice Age''.These depositional episodes are also spatially represented by other dune fields in the
region, providing a broad-scale view of the connections between past climatic events and eolian landscape evolution on the Northern Great Plains. |
| GEOSCAN ID | 299307 |
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