Fossil Fuels
Fossil fuels began to form 300 million years ago, before the age of the dinosaurs.
- Grid
- 13 × 13 Maxi
- Clues
- 62 9 themed
- Average solve
- 13:06 164 solves
- Rating
- 4.7 (7)
- Published
- 3 Nov 2019 Super Sunday
Clues
- 1a: On the ___; point of transition (4)
- 5a: Golf peg (3)
- 8a: Pol___; prudent, suffix (4)
- 12a: Created by the burning of fossil fuels (4)
- 13a: Cavern___; huge, suffix (3)