QQuestionGeology
QuestionGeology
What caused the Old Man of the Mountain to fall in 2003?
A. Volcanic eruption
B. Severe erosion
C. Frost action
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Answer
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Step 1:I'll solve this problem step by step:
Step 2:: Understand the Location
The Old Man of the Mountain was a famous natural rock formation located in Franconia Notch State Park, New Hampshire. It was a series of granite ledges that, when viewed from a certain angle, resembled a human profile.
Step 3:: Analyze the Cause of Collapse
The primary cause of the Old Man of the Mountain's collapse was frost action (Option C). Frost action is a natural geological process where water seeps into cracks in rocks, freezes, and expands, gradually weakening the rock structure.
Step 4:: Explain Frost Action Mechanism
Frost action works through the following process: - Water penetrates small cracks in the rock - When temperatures drop below freezing, the water turns to ice - Ice expands, creating pressure within the rock - Repeated freeze-thaw cycles gradually break down the rock's structural integrity
Step 5:: Confirm Historical Evidence
On May 3, 2003, the iconic rock formation collapsed due to years of weathering and frost action. Geological experts confirmed that the repeated freeze-thaw cycles over many years had progressively weakened the rock's structural bonds.
Final Answer
Frost action caused the Old Man of the Mountain to fall in 2003. Note: While erosion (Option B) is related to frost action, the specific mechanism was the repeated freeze-thaw cycles that gradually broke down the rock's structural integrity.
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