Plays: Lansing (Missourian), Marmaton (Upper Desmoinesian), and St. Louis (Lower Mississippian) Basin: Anadarko County: Finney County Terry Field Perspective maps of the St. Louis "A" Zone

These maps are available in three formats:

Frame-by-frame slide show

Animated GIF (1.1 MB)

QuickTime movie (1.6 megabytes)