EOCENE, 0
LATE JURASSIC, 1
LATE JURASSIC TO EARLY CRETACEOUS, 2
LOWER CRETACEOUS, 3
LOWER JURASSIC TO MIDDLE JURASSIC, 4
MESOZOIC, 5
MID-CRETACEOUS, 6
MIDDLE JURASSIC TO LATE JURASSIC, 7
OLIGOCENE, 8
UPPER CRETACEOUS, 9