Where does the sediment that forms the loess deposits of China come from? What is the origin of loess in Iowa? Name several other significant loess deposits on Earth. Discuss the distribution of...

Where does the sediment that forms the loess deposits of China come from? What is the origin of loess in Iowa? Name several other significant loess deposits on Earth.

Discuss the distribution of permafrost, and explain several periglacial processes. Describe landscapes of the Pleistocene ice-age epoch, and list changes occurring today in the polar regions.