| UNIT_ID |
Unique identifier for a chronostratigraphic unit. |
| UNIT_NAME |
Name of chronostratigraphic unit. |
| CLASS |
Class of chronostratigraphic unit. P=Period, E=Epoch, A=Age, S=Subage. |
| BASE_AGE |
Base age in million years |
| TOP_AGE |
Top age in million years |
| SEQUENCE_NO |
Internal record number used for sorting. |
| COMMENTS |
Comments. |
| CREATE_USER_ID |
Id for the user who created this record. |
| CREATE_DATE |
Date and time this record was created. |
| UPDATE_USER_ID |
Id for the user who last updated this record. |
| UPDATE_DATE |
Date and time this record was last updated. |