| |
Era |
Geological Column (period) |
Years ago (millions) |
Description |
| Age of Mammals |
Cenozoic Era |
Quarternary Tertiary |
0 65 |
- modern people and mammals
- glacial periods
- coal (Ravenscrag Formation)
- loose clay, sand, gravel deposits
|
| Age of Reptiles |
Mesozoic Era |
Cretaceous Jurassic Triassic |
100 150 225 |
- mammals, modern birds, grasses develop
- dinosaurs die out
- development of the Blairmore Formation
- coal formation
- petroleum formation (western Saskatchewan)
- petroleum formation (southwestern SK)
- dinosaurs, birds
- reptiles, small mammals
|
| |
Paleozoic Era |
Mississippian Devonian
Silurain Ordovician
Cambrian |
330 370 415
450 570
|
- petroleum formation (southeastern SK)
- reptiles
- petroleum formation
- potash beds
- rock salt (sodium chloride)
- forests
- fish, amphibians
- land animals
- Tyndall stone (used in construction of Sk legislative buildings and U of S buildings)
- fish with backbones
- petroleum formation
- helium (Swift Current, Wood Mountain)
|
| |
Proterozoic Era (Precambrian) Archeozoic Era (Precambrian) |
|
|
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