| |
| | Informat.io on List Of Time Periods |
 | | This list is poorly defined, unverified or indiscriminate. |
 | | Geologic time units are (in order of descending specificity) eons, eras, periods, epochs, and ages; and the corresponding chronostratigraphic units, which measure "rock-time", are eonothems, erathems, systems, series, and stages. |
 | | A common characteristic of most known calendars is that they measure time in relation to a particular point in history, known as the epoch date. |
| www.informat.io /?title=list-of-time-periods (779 words) |
|