| MAGMA | Hot molten rock formed in the earth's upper mantle (5) |
| RHAETIC | Of some rocks formed in late Jurassic period (7) |
| NUGGET | Small lump of precious metal found ready-formed in the earth (6) |
| SIAL | Rocks of the earth's upper crust (4) |
| OZONE | Earth's upper layer of protection (5) |
| SHALE | Abundant sedimentary rock, formed by compression of successive layers of clay, silt etc. (5) |
| ROTOR | In meteorology, a turbulent eddy formed in the trough of lee waves in mountainous areas, often assoc |
| ASTER | Star-shaped structure formed in the cytoplasm of a cell (5) |
| DREAM | Image formed in the mind while asleep (5) |
| CHYLE | Milky fluid formed in the small intestine during digestion (5) |
| UNLIT | Dark line formed in the middle of one (5) |
| SAXON | English heavy metal band, formed in the mid 1970s, whose latest album is 2024's Hell, Fire and Damnation (5) |
| CHALK | Rock formed from sediment |
| NONET | Group similar to a Miles Davis-led band formed in the late 1940s, e.g. |
| ONSET | Stone formed in the beginning |
| LAVA | Hot molten rock erupting from a volcano (4) |
| LITHOSPHERE | Solid outer part of the earth, consisting of the crust and the upper mantle (11) |
| AURORA | The name for the luminous phenomenon of Earth's upper atmosphere that occurs primarily in high latitudes of both hemispheres. (6) |
| IGNEOUS | Of rock, formed by the solidification of molten or partially molten magma (7) |
| IONOSPHERE | Region of Earth's upper atmosphere abundant in charged particles |
