A region on Earth’s surface with physical features, such as hills, valleys, and streams. The...
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Transcript of A region on Earth’s surface with physical features, such as hills, valleys, and streams. The...
A region on Earth’s surface with physical features, such as hills, valleys, and streams.
The shape (topography) and composition of the landscape is determined by the climate, bedrock, geologic structures, and human activities.
Topographic relief is the change in elevation between the highest and the lowest places.
Landscapes
Mountain landscapes have the greatest relief between the highest peaks and the deepest valleys.
A great variety of rock types are common. Mountains are common where converging
tectonic plates collide. Stream gradients are
high, and the fast moving streams quickly erode deep valleys between the mountain peaks.
Landscape Regions
Plateau landscapes are relatively flat or rolling uplands where streams have cut deep valleys.
Commonly underlain by flat layers of sedimentary rock.
Less topographic relief than mountains but more relief than the plains.
Landscape Regions
Plains have the least topographic relief. They may contain a few small hills, but are
generally flat and at low elevation. Commonly underlain by flat layers of
sedimentary rock.
Landscape Regions
Moist, Humid climates usually have rounded landscapes.
Slopes are not as steep because moist climates promote a protective cover of vegetation.◦ Plants cover protects the soil
from rapid runoff and erosion.
Climate Influence on Regions
Arid (dry) climates usually produce thin soils with little humus.
With little plant cover to protect the soil, sediment is carried away during rainfall.◦ Large areas of exposed bedrock and steep rock
faces are the result.
Climate Influence on Regions
Landscape Regions of the US
Landscape Regions of NY
Harder rocks will form hills and ridges. Erosion of the weaker rock will make the
major valleys.◦ Streams will tend to follow zones of weaker rock
and flow downhill.
Drainage Patterns
Drainage Patterns
Farming and construction projects can accelerate erosion and effect landscape development.
Farmers and engineers must be guided in planning their projects by appropriate conservation practices.
Human Activities Can Affect Landscapes