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Paleo Slide Set: The Ice Ages
Baoji section of the Loess Plateau, China
New evidence from terrestrial deposits also seems to support the theory of orbital forcing. This slide shows the upper part of a section of loess near Baoji in southern China's Central Loess Plateau. Note the alternation of four thin dark brown soils (S0 to S4) with relatively unaltered loess sections (dark to light tan). These soils represent interglacial periods when climates were wet enough to sustain vegetation development. During glacial periods, climates were colder, drier, and windier, leading to sparse vegetation cover and extensive mineral dust (loess) accumulation in many parts of the world.

Photo Credits:
Nat Rutter
Department of Geology, University of Alberta, Edmonton, Canada.
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Last Modified: 12 October 2001

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