DK Science: Lakes
Copyright © 2007 Dorling Kindersley
Lakes form where water fills hollows in the landscape. Some of these hollows are formed by glaciers gouging into the ground, and some are created when river valleys are blocked by dams. Other lakes are formed in volcanic craters, or when land sinks during earth movements. Most lakes contain freshwater, but there are some saltwater lakes, such as the Dead Sea between Israel and Jordan.