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The ICS international chronostratigraphic chart (v2022/2).

Usage

stratigraphy

Format

A data.frame with 5 variables:

type

Unit type ("eon", "era", "period", "series" or "stage"). Precambrian and Hadean are informal units.

name

Unit name.

age

Numerical age (Ma).

error

Error on numerical age (Ma).

parent

Parent unit.

References

Cohen, K. M., Finney, S. C., Gibbard, P. L. and Fan, J.-X. (2013). The ICS International Chronostratigraphic Chart. Episodes, 36(3): 199-204. doi:10.18814/epiiugs/2013/v36i3/002