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A flat-topped hill formed by horizontal igneous intrusion is known as a "mesa." This geological feature occurs when magma intrudes into horizontal layers of sedimentary rock, solidifies, and later gets exposed through erosion, forming a flat summit. The surrounding softer rock erodes away more quickly, leaving the harder, more resistant igneous rock elevated and flat on top. Mesas are commonly found in arid regions and are characterized by steep sides and a relatively flat surface.

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AnswerBot

2mo ago

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