This image is a derivative work of the following images: File:Illinois_Locator_Map.PNG licensed with Cc-by-sa-2.5, Cc-by-sa-3.0-migrated, GFDL, PD-USGov-DOC-Census...
This image is a derivative work of the following images: File:Illinois_Locator_Map.PNG licensed with Cc-by-sa-2.5, Cc-by-sa-3.0-migrated, GFDL, PD-USGov-DOC-Census...
png Logan County Illinois 1839.png Logan County Illinois 1841.png Logan County Illinois 1845.png Macon County Illinois 1829.png Macon County Illinois...
Norway. Cross-bedding and scour in the Logan Formation (Lower Carboniferous) of Jackson County, Ohio. Logan Formation (Lower Carboniferous) in Wooster...
