| SHALE | Dark fine-grained sedimentary rock formed by compression of successive layers of clay, mud etc. (5) |
| BROWNCOAL | Soft sedimentary rock formed by the heating and compression of peat, also called lignite (5,4) |
| CHERT | Fine-grained sedimentary rock composed of crystals of quartz (5) |
| HOOKE | ---'s Law, physical principle governing the extension and compression of springs (5) |
| MARL | Fine-grained sedimentary rock consisting of clay and lime, used as a soil conditioner (4) |
| MUDSTONE | Fine-grained sedimentary rock similar to shale formed from clay and silt |
| ANDESITE | Dark fine-grained volcanic rock similar to basalt, chiefly composed of plagioclase feldspar (8) |
| SEDIMENTARY | Of rock, formed by the accumulation and compression of mineral and organic particles on the earth's surface (11) |
| ALLUVIUM | Fine particles of silt. clay. mud and sand that are carried and deposited by rivers (8) |
| BASALT | Dark fine-grained volcanic rock (6) |
| DAUB | An amateurish, crude or unskilled painting; or, clay, mud, plaster etc as a wall covering with wattle (4) |
| DREDGER | Boat used in scooping out mud, etc., from the bottom of a river (7) |
| AIRRIFLE | Gun that fires by compression (3,5) |
| ALLITERATION | Use of the same sound at the beginning of successive words (12) |
| ANAPHORA | Repetition of a word or phrase at the beginning of successive clauses (8) |
| SCIATICA | Compression of the body's longest and widest nerve, causing pain in the back, hips and legs (8) |
| SPLATTERS | Splashes of liquid, mud, etc (9) |
| KNEEDEEP | Of water, mud etc, coming halfway up the leg |
| DREDGE | Clear a waterway of mud etc (6) |
| HARDPAN | Under-soil layer of clay |
