Type
Zone
Age range
50.8–50.4 Ma
A. cuneicamerata LOZ
A. pentacamerata PRZ
M. aragonensis/M. subbotinae CRZ
50.8050.7850.7650.7450.7250.7050.6850.6650.6450.6250.6050.5850.5650.5450.5250.5050.4850.4650.4450.4250.40