| Answer | Crossword Clue |
|---|---|
| ORES | Metal-yielding rocks |
| SHALES | Fuel-yielding rocks |
| SHALES | Fossil-yielding rocks |
| titaniferous | (of rocks and minerals) Containing or yielding titanium |
| ORES | Metal-bearing rocks |
| ORES | Metal-filled rocks |
| ORE | Metal in rocks |
| ORES | Rocks containing metal. |
| ORES | Metal-containing rocks |
| metallogenic | of an element, occurring as an ore or a naturally occurring metal, as opposed to in rocks |
| silicates | Any of the many minerals consisting primarily of SiO42? combined with metal ions, forming a major component of the rocks of the earth's crust |
