Sometimes a layer of sand was put down, if it could be found.

Over time the sea rose and fell leaving behind a deep layer of sand.

Several layers of sand had been added over the shells.

They shouldn't feel like a layer of sand scraping over her skin.

In some areas they are covered with a layer of volcanic sand.

It's covered by a thick layer of sand along its whole length.

After the land was cleared, a layer of mixed sand and earth were laid.

An excavation, done in 1979 by the city museum, revealed a lot from a house under the layers of sand.

The structure apparently burned, and the remains were covered by a layer of clean sand.

These rock beds were once layers of sand deposited on the sea floor.