library(ggplot2)
alta_lake_adm <- age_depth_model(
alta_lake_210Pb_ages,
depth = depth_cm,
age = age_year_ad
)
ggplot(alta_lake_210Pb_ages, aes(y = depth_cm, x = age_year_ad)) +
geom_path() +
geom_point() +
scale_y_reverse(sec.axis = age_depth_as_sec_axis(alta_lake_adm))
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