find base of stratigraphic column
Examples
s = as_stratcol(c(0.5, 1, 0.3, 0.7), c("sand", "shale", "sand", "shale"), L_unit = "m", base = 2)
get_base(s) # returns 2
#> [1] 2
find base of stratigraphic column
s = as_stratcol(c(0.5, 1, 0.3, 0.7), c("sand", "shale", "sand", "shale"), L_unit = "m", base = 2)
get_base(s) # returns 2
#> [1] 2