| Answer | Crossword Clue |
|---|---|
| geophones | GEOPHONE, a device that detects vibrations in the earth |
| Answer | Crossword Clue |
|---|---|
| geophones | GEOPHONE, a device that detects vibrations in the earth |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.