Epoch (geology): Difference between revisions

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is a subdivision of the geologic timescale that is longer than an [[age (geology)|age]fg] and shorter than a period. We are currently living in the Holocene Epoch of the Quaternary Period. Rock layers deposited during an epoch are called a series. Series are subdivisions of the stratigraphic column that, like epochs, are subdivisions of the geologic timescale. Like other geochronological divisions, epochs are normally separated by significant changes in the rock layers they correspond to.

Epochs are most commonly used for the younger Cenozoic Era, where a greater collection of fossils has been found and paleontologists have more detailed knowledge of the events that occurred during those times. They are less commonly referred to for the other eras and eons, since less fossil evidence exists that allows us to form a clearer view of those time periods.

List of series (epochs) in the Phanerozoic eon

List is ordered from youngest to oldest and subdivided based on era and period.

Cenozoic

Quaternary
- Holocene
- Pleistocene

Neogene
- Pliocene
- Miocene

Paleogene

Mesozoic

Cretaceous
- Late (Upper)
- Early (Lower)

Jurassic

Triassic

Paleozoic

Permian
- Lopingian
- Guadalupian
- Cisuralian

Carboniferous
- Pennsylvanian
- Mississippian

Devonian
- Late (Upper)
- Middle
- Early (Lower)

Silurian
- Přídolí
- Ludlow
- Wenlock
- Llandovery

Ordovician
- Late (Upper)
- Middle
- Early (Lower)

Cambrian
- Late (Upper)/Furongian
- Middle
- Early (Lower)

References

Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press

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 {{about||historical time|epoch (reference date)|astronomical usage|epoch (astronomy)}}
+In [[geochronology]], and Daniel
-In [[geochronology]], an '''epoch''' is a subdivision of the [[geologic timescale]] that is longer than an [[age (geology)|age]fg] and shorter than a [[period (geology)|period]]. We are currently living in the [[Holocene]] Epoch of the [[Quaternary]] Period. Rock layers deposited during an epoch are called a [[series (stratigraphy)|series]]. Series are subdivisions of the [[stratigraphic column]] that, like epochs, are subdivisions of the geologic timescale. Like other geochronological divisions, epochs are normally separated by significant changes in the rock layers they correspond to.
+ is a subdivision of the [[geologic timescale]] that is longer than an [[age (geology)|age]fg] and shorter than a [[period (geology)|period]]. We are currently living in the [[Holocene]] Epoch of the [[Quaternary]] Period. Rock layers deposited during an epoch are called a [[series (stratigraphy)|series]]. Series are subdivisions of the [[stratigraphic column]] that, like epochs, are subdivisions of the geologic timescale. Like other geochronological divisions, epochs are normally separated by significant changes in the rock layers they correspond to.
 Epochs are most commonly used for the younger Cenozoic Era, where a greater collection of fossils has been found and paleontologists have more detailed knowledge of the events that occurred during those times. They are less commonly referred to for the other eras and eons, since less fossil evidence exists that allows us to form a clearer view of those time periods.