Stable version from the CRAN
library(chronosphere)
#> Chronosphere - Evolving Earth System Variables
#> Important: never fetch data as a superuser / with admin. privileges!
#>
#> Note that the package was split for efficient maintenance and development:
#> - Plate tectonic calculations -> package 'rgplates'
#> - Arrays of raster and vector spatials -> package 'via'