plots a stratlist, i.e. a list of values associated with stratigraphic positions (typically returned by time_to_strat). will plot the element with matching ord_name against stratigraphic positions.
# S3 method for stratlist
plot(x, orientation = "du", ord_name = "y", ...)stratlist object
character, either "du" (down-up) or "lr" (left-right). Orientation of plotting
name of the ordinate. Values plotted against time
further arguments passed to plot