| Chronostratigraphy Hierarchy |
| Start | End | Erathem | Sub-Era | System | Sub-Sy | Series | Sub-Ser | Stage |
| Age | Age | them: | stem | ies |
| (Million Years) |
| 65 | 0 | CC | Cenozoic |
| 2 | 0 | Q | Quaternary |
| 0.01 | 0 | QH | Holocene (Recent) |
| 2 | 0.01 | QP | Pleistocene |
| 0.12 | 0.01 | QU | Upper Pleistocene |
| 0.76 | 0.12 | QM | Middle Pleistocene |
| 2 | 0.76 | QL | Lower Pleistocene |
| 65 | 2 | GN | Tertiary |
| 23 | 2 | N | Neogene |
| 5 | 2 | NP | Pliocene |
| 3.5 | 2 | NU | Upper Pliocene |
| 5 | 3.5 | NL | Lower Pliocene |
| 23 | 5 | NM | Miocene |
| 11 | 5 | NA | Upper Miocene |
| 7.5 | 5 | NE | Messinian |
| 11 | 7.5 | NT | Tortonian |
| 17 | 11 | NB | Middle Miocene |
| 14 | 11 | NS | Serravallian |
| 16 | 14 | NG | Langhian |
| 23 | 17 | NC | Lower Miocene |
| 20 | 16 | NR | Burdigallian |
| 23 | 20 | NQ | Aquitanian |
| 65 | 23 | G | Palaeogene |
| 34 | 23 | GO | Oligocene |
| 26 | 23 | GU | Upper Oligocene |
| 26 | 23 | GH | Chattian |
| 31 | 26 | GV | Middle Oligocene |
| 29 | 26 | GJ | Rupelian |
| 34 | 31 | GW | Lower Oligocene |
| 53 | 34 | GE | Eocene |
| 39 | 34 | GA | Upper Eocene |
| 37 | 34 | GR | Priabonian |
| 39 | 37 | GB | Bartonian |
| 45 | 39 | GL | Middle Eocene |
| 45 | 39 | GI | Lutetian |
| 53 | 45 | GY | Lower Eocene |
| 53 | 45 | GZ | Ypresian |
| 65 | 53 | GP | Palaeocene |
| 55 | 53 | GS | Sparnacian |
| 59 | 55 | GT | Thanetian |
| 63 | 59 | GC | Upper Paleocene |
| 62 | 59 | GK | Middle Palaeocene |
| 62 | 59 | GM | Montian |
| 65 | 62 | GF | Lower Palaeocene |
| 65 | 62 | GD | Danian |
| 245 | 65 | MM | Mesozoic |
| 130 | 65 | K | Cretaceous |
| 95 | 65 | KU | Upper Cretaceous |
| 88 | 78 | KD | Senonian |
| 72 | 65 | KM | Maastrichtian |
| 83 | 72 | KC | Campanian |
| 86 | 83 | KS | Santonian |
| 88 | 86 | KO | Coniacian |
| 91 | 88 | KT | Turonian |
| 95 | 91 | KE | Cenomanian |
| 130 | 95 | KL | Lower Cretaceous |
| 107 | 95 | KA | Albian |
| 112 | 107 | KP | Aptian |
| 114 | 112 | KB | Barremian |
| Page 1 of 4 | 07/07/2004 |