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Despite these seemingly unbearable extremes, we live in a land of plenty because of the most fertile soil in the world, courtesy of the Great Ice Age.According to scientists, over the course of the last two million years, at least four (possibly six), periods of glaciation ploughed out an assortment of rock from Canada, moved it south in a 100-foot high flow of ice and snow, pulverized it against bedrock, and deposited it on the Midwest plain. developed the concept of the paper and collected field data. The authors declare no competing financial interests.

This research was supported by the USGS Mendenhall Postdoctoral and Earth Surface Dynamics Programs.

Interactions between peatland drainage and fire are likely to cause long-term carbon emissions to far exceed rates of carbon uptake, diminishing the northern peatland carbon sink.

In Climate Change 1995: Impacts; Adaptations and Mitigation of Climate Change. Contribution of Working Group II to the Second Assessment Report of the Intergovernmental Panel of Climate Change 95–129 (eds Watson, R., Zinyowera, M.

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Prices in € represent the retail prices valid in Germany (unless otherwise indicated). Prices do not include postage and handling if applicable. Two chemical treatments for lead-210 measurement were compared on the sub-surface samples of a core from an ombrotrophic bog from East Belgium.