| Answer | Crossword Clue |
|---|---|
| EDGES | Where planes meet |
| grooves | An indentation where two planes of rock meet at an angle of more than 120░ |
| dihedrals | A place where two planes of rock meet at an angle of between 60░ and 120░ |
| dome | form of crystal composed of planes parallel to a lateral axis that meet above in a horizontal edge like a roof |
| domes | form of crystal composed of planes parallel to a lateral axis that meet above in a horizontal edge like a roof |
| domal | form of crystal composed of planes parallel to a lateral axis that meet above in a horizontal edge like a roof |
