1. The Geological Priods:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian
- Triassic
- Jurassic
- Cretaceous
- Tertiary
- Quaternary
2. COS D Carboniferous PeT Jurassic CreT Q
3. The layers order is:
- D
- A
- E
- B
- C
1. The Geological Priods:
2. COS D Carboniferous PeT Jurassic CreT Q
3. The layers order is: