gravel bed

These stone anchors are found either partially buried or exposed on the gravel bed.

This led to the removal of the gravel bed, ties, and tracks.

The typical habitat would be relatively fast moving water over a shallow gravel bed.

Once the bottom step is in place, excavate above it for the next step and gravel bed.

The sleepers are laid on the gravel bed where the panel track was.

This allows a period of rest to let the microorganisms have time to break down the wastes built up in the gravel bed.

The gravel beds extend to the east as far as London.

This is one of the finest gravel beds in the country and has been extensively worked.

The gravel bed can be seen as light-coloured areas of varying width in the image to the right.

A giant boulder prevented direct access to the gravel bed.