stratigraphy {folio}

Chronostratigraphic Chart

Description

The ICS international chronostratigraphic chart (v2022/2).

Usage

stratigraphy

Format

A data.frame with 176 observations and 5 variables:

type

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

name

character: unit name.

age

numeric: numerical age (Ma).

error

numeric: error on numerical age (Ma).

parent

character: parent unit.

Source

https://stratigraphy.org/ICSchart/ChronostratChart2022-02.pdf

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