A thin layer of snow did indeed cover the ground.

It was as though a layer of ice had covered his feelings.

A light layer of snow covered the ground, and the trees grew almost right up to the house.

It is however covered by a thick layer of ice.

A thin layer of dust covered everything in the room.

Another layer of glass will cover the elevator doors on each floor.

For all she knew the ground was a rock, covered by a thin layer of dirt.

The ground must be covered by a layer of ice to which snow will not stick.

It was nearly bare, only a single layer of leaves covering the ground.

Early on, the earth was covered by a deep layer of molten rock.