GeologyRocks

The middle period of the Mesozoic from 199Ma to 145Ma.

It is split into the follwing eras:

• Upper: 161-145MA
• Middle: 175-161Ma
• Lower: 199-175MA

Which are split into the following Stages:

• Tithonian: 150-145Ma
• Kimmeridgian: 155-150Ma
• Oxfordian: 161-155Ma
• Callovian: 164-161Ma
• Bajocian: 167-164Ma
• Bathonian: 171-167Ma
• Aalenian: 175-171Ma
• Toarcian: 183-175Ma
• Pliensbachian: 189-183Ma
• Sinemurian: 196-189Ma
• Hettangian: 199-196Ma