- EPOCH
- Memorable period
- Period of history
- Pleistocene, e.g.
- Long period
- Historically important period of time
- Unit in machine learning or history
- Distinctive period
- Earth science chapter
- Geologist's division
- Historic period
- Time period
- Period part
- Geological span
- Geological period
- Long time
- Paleontology period
- Era
- Holocene, for one
- Noted stretch
- Multiple ages together
- Noteworthy period
- Distinctive historical period
- Period on a geologic time scale
- Long period of time
- Memorable time
- Beginning of a historic period
- Geological time
- Period piece
- Significant period
- Geologic time unit
- Time to remember
- Period in history
- Notable period
- Historical period
- Notable time period
- Geologic period
- Special period
- Memorable period of time
- Remarkable time
- Distinctive time
- Geological interval
- Notable time span
- Pliocene, e.g.
- Historical time
- The Eocene, for one
- Extended period
- Period of note
- Prominent period
- See 49-Down
- Big period
- Historical segment
- Pleistocene period
- Many, many years
- Noteworthy time period
- Unit in geochronology
- Momentous era
- Geological episode
- Important period
- Age
- Period of time
- Moment in time, in astronomy
- Important age
- Period in cosmology
- Geologist's time span
- Important era
- Important time period
- Geologic time period
- Period
- Pleistocene, for one
- Fixed time.
- Event marking a new period.
- Important point of time.
- Part of a geological period.
- Date.
- Time.
- Division of time
- Signal period of time
- Miocene or Pliocene
- Eocene or Neocene
- Golden age, e.g.
- Historic beginning
- Cycle
- Anthropocene, for one
- Eocene, e.g.
- Pleistocene is one
- Eocene, for one
- Part of a period
- Significant time
- Historic time
- Long, long time
- Part of a period, geologically
- Ages and ages
- Geologic span
- Several ages, in geology
- Timeline segment
- Late Jurassic, e.g.
- Historical stretch
- The Oligocene, e.g., in geology
- Early Jurassic, e.g.
- It's quite the stretch
- Geological time unit
- Distinctive era
- The current one is the Holocene
- A unit of geological time
- A memorable date
- Miocene, for one
- Noteworthy period of history
- Noteworthy time
- Years and years
- Date of reference
- Memorable era
- Important historical period
- A notable period of history
- Notable historic period
- Unit of geologic time
- Unit of geological time
- Paleocene, for one
- Holocene, for example
- Remarkable period
- Geological stretch
- Era's advent
- Great time
- Distinctive period of history
- Pliocene, for one
- Long geologic time period
- Eocene or Pliocene
- Period divided into ages
- Pliocene or Eocene
- Pliocene or Miocene
- The Eocene, e.g.
- Distinct period of time
- Noteworthy time span
- Big time
- Oligocene, for one
- Miocene, for example
- Division of a geologic period
- Particular time
- Period of geological time
