It happened to take place on a sheet of ice.

During winter, the ice sheet takes on a clear blue/green color.

Around 70% of the fresh water on the Earth is held in this ice sheet.

She could see the ice sheets, and exactly where the tree line started.

In any case, there were no significant ice sheets during this time.

Ice sheets on land, but having the base below sea level.

They spend most of their lives in the water rather than on the ice sheets or dry land.

The world was a pretty sight from the ice sheet.

He pointed at the fresh sheet of ice down below.

The roads will be one big sheet of ice by tonight.