An ice stream (ice flow), a type of fast moving glacier
An ice dam (ice jam), a blockage of ice in a river starting with an ice floe in the river.
Any type of sea ice not attached to land, drift ice.
A flat mass of floating ice, smaller than an ice field.
A principal mountain mass.
A block of the earth's crust bounded by faults or flexures and displaced as a unit without internal change; normally consists of gneisses and schists