Sorry I'm late on this, but your answer is, "Ming."
Answer:
During the 1960's the disclosure of enormous gas and oil fields in Alaska accelerated the change of most coal framework to other petroleum products. During this period Usibelli Coal Mine bought the Suntrana mine and the mining activities in the Matanuska coal fields stopped activity.
What happens is the expanding water molecules begin to form ice crystals. Yes ice is a mineral. Finally yes a glacier is a rock