Tomorrow I'll lecture on a proxy that Keith mentioned in his presentation - sand dunes. Relic dune fields are one of the main sources of information about the impacts of past droughts on the Great Plains, so I'll review briefly the distribution of dunes in North America, the basics of optical dating and some of recent findings about the behavior of these systems in the 19th century. After that, we'll track back to isotopes, building on our discussion from two weeks ago.
Slides for tomorrow are here.
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