Which process creates a tarn within a mountain cirque?

💡 Explanation

Glacial isostatic rebound causes a depression in the cirque floor where the ice was thickest. This is because the land slowly rises after ice mass reduction; therefore, meltwater collects to form a tarn rather than draining away immediately.

• Which risk increases when heavy tephra accumulates after eruption?
• Which outcome occurs when significant tephra deposition blankets vegetation?
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• Which consequence results when differential lithification rates affect mesa erosion?
• Which outcome will increased Arctic soil saturation cause?
• Which primary effect occurs as a result of the cyclic elastic strain accumulation near strike-slip fault lines?