The Appalachian mountain are a long chain of mountains called a

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Explanation:

The Appalachian Mountains, often called the Appalachians, are a system of mountains in eastern North America.

A mountain chain is a row of high mountain summits, a linear sequence of interconnected or related mountains, or a contiguous ridge of mountains within a larger mountain range. ... While in mountain ranges, the term mountain chain is common, in hill ranges a sequence of hills tends to be referred to a ridge or hill chain.

Explanation:

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