stratigraphy {folio} | R Documentation |
The ICS international chronostratigraphic chart (v2022/2).
stratigraphy
A data.frame
with 176 observations and 5 variables:
character
: unit type ("eon
", "era
", "period
",
"series
" or "stage
"). Precambrian and Hadean are informal units.
character
: unit name.
numeric
: numerical age (Ma).
numeric
: error on numerical age
(Ma).
character
: parent unit.
https://stratigraphy.org/ICSchart/ChronostratChart2022-02.pdf
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