Hill

Hill is a landform that extends above the surrounding terrain. It often has a distinct summit, although in areas with scarp/dip topography a hill may refer to a particular section of flat terrain without a massive summit (such as on a hillside).

Definition

The distinction between a hill and a mountain is unclear and largely subjective, but a hill is universally considered to be less tall and less steep than a mountain. In the United Kingdom, geographers historically defined a mountain as a hill higher than 1,000 feet (300 m). In contrast, hillwalkers have tended to regard a hill as something that's just over 500 feet (150 m). In the United States, a hill is often considered to be less than 1,000 feet (300 m).

Formation

Hills are formed through a variety of geologic processes. Hills can be formed by erosion, as material from other areas is deposited near the hill, causing it to grow. They can also be formed through deposition, where sediment and other materials are deposited onto the hill, causing it to grow.

Types of Hills

There are several types of hills, including:

• Drumlin – a hill formed by glacial action.
• Butte – an isolated hill with steep sides and a small flat top.
• Tor – a high, rocky hill.
• Puy – a conical volcanic hill.
• Mesa – a hill with a flat top and steep sides.

See Also

• Mountain
• Plateau
• Plain
• Valley
• Dune

References

Hill Resources
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