| Answer | Crossword Clue |
|---|---|
| tillite | a stiff impervious clay |
| tillites | TILLITE, a stiff impervious clay |
| puddle | earthy mixture (as of clay, sand, and gravel) worked while wet into a compact mass that becomes impervious to water when dry |
| earthenware | Pottery made of clay fired to a porous state that can be made impervious to liquids by the use of a glaze |
