This plaque states that they are eroded formations of a type of marine limestone that sits on top of hardened clay.

Amid the chunks of hardened clay lay two compactly folded wads of paper.

He pulled himself up hand over hand, kicking footholds in the mass of hardened clay.

A bulla is a flattened lump of hardened clay bearing the impression of a seal.

These plant-based materials, once encased in hardened clay, could be painted in lively colors.

The durable nature of hardened clay contrasts with the soft vulnerability of the object's identification as a human organ.

Once cool, the hardened clay is chipped away, leaving behind an image now cast in bronze.

First Temple period bulla-a piece of hardened clay with a seal impression upon it, c. 2,600 years old.

A ladder led up to it, and contrary to usual custom, all the walls were of hardened clay.

Most of the surface consists of thin strata of hardened clay with pockets of water between them.