It was hard clay, too rough to show any footprints.

The hard clay of the floor was covered with rushes which had gone damp and brown.

I started with hard, dry clay from the river's edge and pounded it to dusty earth.

He scraped some more, down to a mixture of hard red clay and sandstone.

The hard clay felt real in his hand.

The soil is hard clay and the climate is somewhat dry.

The erosion formed a smooth floor of hard clay.

"You shall all die for imprisoning us in this cold, hard clay."

The hard clay of the gully was three meters high here and steep.

I touched the cold butt of the gun under my arm, opened the car door and slid out on to the hard clay, stood there.