| Answer | Crossword Clue |
|---|---|
| FAULT | Fracture in the earth's crust |
| RIFTS | Breaks in the earth's crust |
| OXYGEN | Most abundant element in the earth's crust |
| FOUNDFAULT | Establish a new crack in the earth's crust? |
| ASTATINE | Rarest naturally occurring element in the earth's crust |
| SODIUM | Sixth most abundant element in the Earth's crust |
| SILICIC | Pertaining to the second most common element in the Earth's crust |
