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Geography

Vent

Geography; Geography

The opening at the Earth's surface through which volcanic materials (lava, tephra, and gases) erupt. Vents can be at a volcano's summit or on its slopes; they can be circular (craters) or linear ...

Township and range

Geography; Geography

The rectangular system of land subdivision of much of the agriculturally settled United States west of the Appalachian Mountains; established by the Land Ordinance of 1785.

Tree line

Geography; Geography

Either the latitudinal or the elevational limit of normal tree growth. Beyond this limit, closer to the poles or at higher or lower elevations, climatic conditions are too severe for such growth.

Transhumance

Geography; Geography

The seasonal movement of people and animals in search of pasture. Commonly, winters are spent in snow-free lowlands and summers in the cooler uplands.

Transferability

Geography; Geography

The extent to which a good or service can be moved from one location to another; the relative capacity for spatial interaction.

Underpopulation

Geography; Geography

Economically, a situation in which an increase in the size of the labour force will result in an increase in per worker productivity.

Uniform region

Geography; Geography

A territory with one or more features present throughout and absent or unimportant elsewhere.

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