Question

how is Black mountain formed​

Answer 1

Answer:

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The mountains themselves were formed roughly 200–400 million years ago during the Alleghenian orogeny, when the collision of two continental plates thrust what is now the Appalachian Mountains upward to form a large plateau. Weathering and minor geologic events in subsequent periods carved out the mountains.

Answer 2

Answer:

Black Mountain's structure resulted from slow geological processes. Around 260 million years ago, a mass of molten rock (magma) slowly solidified deep below the earth's surface, forming a body of hard granite rock. ... The solid granite core of the mountain now lies beneath the jumbled cover of boulders.