In describing this migration, Bernard Stonehouse stated in his book North Pole, South Pole: “Hard ice is elastic but readily deformable; under pressure its hexagonal crystals align, then slide on each other to create the flowing and slumping we associate with glaciers. ”
वर्ष प्रतिवर्ष, जैसे - जैसे ज़्यादा हिम और वर्षा होती है, निरन्तर पुँज बनता जाता है ।