In my new life as the only geophysicist in a geology/geography department, one of my first jobs is to figure out the local stratigraphy. These are the rocks we plan to investigate by outcrop and near-surface studies, ultimately building a 3D digital geomodel. The formation of interest just now is the Mississippian Lime, a hot oil target in Oklahoma and Kansas. Now there have been stratigraphers working around NW Arkansas for more than a century, many of them still alive and kicking. I am the new kid on the block and sure to step on some toes as I try to understand the stratigraphic section.