It is constructed by pumping seawater into a contained area and allowing the water to freeze; by repeating this procedure, additional layers are built up.
By repeating this procedure several times, additional layers are built up. It is constructed by pumping seawater into a contained area and allowing the water to freeze.
It is constructed by pumping seawater into a contained area and allowing the water to freeze. By repeating this procedure several times, additional layers are built up.
It is constructed by pumping seawater into a contained area and allowing the water to freeze. By repeating this procedure several times, additional layers are built up.