Lake

Lake is a large body of water that is surrounded by land. Lakes are found on every continent and in every kind of environment - in mountains and deserts, on plains, and near seacoasts. They are formed through a variety of geological processes, including tectonic activity, weathering, and erosion.

Formation

Lakes can be formed in several ways. Some are created by glaciers, large slow-moving sheets of ice that carve out basins in the earth. Others are formed when a section of a river becomes blocked, either by a natural dam of fallen trees or by a man-made dam. Still others are created by volcanic activity, when a volcano erupts and then collapses, leaving a crater that fills with water.

Types of Lakes

There are many different types of lakes, including:

• Glacial lakes: These are formed by glaciers that have carved out a basin in the earth. When the glacier melts, the basin fills with water.

• Tectonic lakes: These are formed by the movement of the earth's crust. When two plates of the earth's crust move apart, a basin is formed that can fill with water.

• Volcanic lakes: These are formed when a volcano erupts and then collapses, leaving a crater that fills with water.

• Oxbow lakes: These are formed when a river changes course, leaving a section of the old river behind.

Importance of Lakes

Lakes are important for a number of reasons. They provide a source of drinking water, for irrigation, and for hydroelectric power. They are also a major source of fish and other wildlife, and provide recreational opportunities such as swimming, boating, and fishing.

See Also

• River
• Ocean
• Pond
• Reservoir

References

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