I've recently downloaded the RockWorks demo, and am trying it out. I noticed the following quote in the help files, "Stratigraphic layers be listed in the same order from borehole to borehole. Units can be missing, but they cannot change order." Does this mean that repeated stratigraphic sections are not possible. I sometimes work in areas where faulting and/or folding causes sections to be repeated (or inverted) so this in an important capability for me.