osagean

Biohermal mound & draping beds (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 3
by James St. John

Pudoproetus auriculatus fossil trilobite (Byer Sandstone, Lower Mississippian; Rt. 16 roadcut, 1.45 miles south of Granville, Ohio, USA) 2
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 3
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; Mt. Pleasant, Lancaster, Ohio, USA) 1
by James St. John

Cross-bedding in quartzose sandstone (Black Hand Sandstone, Lower Mississippian; railroad cut west of Black Hand Gorge, Ohio, USA) 2
by James St. John

Zoophycos in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 4
by James St. John

Calcite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 1
by James St. John

Shark tooth (Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 12
by James St. John

Fossiliferous quartzose sandstone (Byer Sandstone, Lower Mississippian; eastern Ohio, USA) 3
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 15
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 11
by James St. John

Granulose-pebbly quartzose sandstone (Black Hand Sandstone, Lower Mississippian; Mt. Pleasant, Lancaster, Ohio, USA) 2
by James St. John

Partially geodized crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 9
by James St. John

Fossiliferous sandstone (Byer Sandstone, Lower Mississippian; gravel bar clast, Chatham, Ohio, USA) 1
by James St. John

Dichocrinus ficus (fossil crinoid) (Edwardsville Formation, Lower Mississippian; near Crawfordsville, Indiana, USA) 6
by James St. John

Dolostone (Rockford Limestone, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 1
by James St. John

Fossiliferous quartzose sandstone (Byer Sandstone, Lower Mississippian; eastern Ohio, USA) 2
by James St. John

Partially geodized crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 13
by James St. John

Zoophycos trace fossils (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 2
by James St. John

Vugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 1
by James St. John

Synbathocrinus fossil crinoid (Burlington Limestone, Mississippian; Missouri, USA) 1
by James St. John

Shale ("Middle Blue", Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 9
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 13
by James St. John

Chertified crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA)
by James St. John

Faulted Fort Payne Formation (Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 20
by James St. John

Fossil shark tooth (Sanders Group, Mississippian; Henderson Creek roadcut, Lawrence County, Indiana, USA) 1
by James St. John

"Liesegang banding" in sandstone (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam roadcut, northwest of Nellie, Ohio, USA) 4
by James St. John

Zoophycos in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 3
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 13
by James St. John

Mississippian-Pennsylvanian unconformity (Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 1
by James St. John

Partially geodized crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 11
by James St. John

Calcite-lined geode (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 4
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 12
by James St. John

Turgite on sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 3
by James St. John

Syringothyris sp. (fossil brachiopod) (Vinton Member, Logan Formation, Lower Mississippian; Route 16 roadcut northeast of Frazeysburg, Ohio, USA) 3
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 10
by James St. John

Biohermal mound & draping beds (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 5
by James St. John

Brachiopod (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 8
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 6
by James St. John

Fossiliferous quartzose sandstone (Byer Sandstone, Lower Mississippian; eastern Ohio, USA) 1
by James St. John

Mudchips in sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 2
by James St. John

Buffalo River Flint (attributed to the Ft. Payne Formation, Lower Mississippian; Tennessee, USA) 1
by James St. John

Byer Sandstone (Lower Mississippian; State Farm Quarry, Newark, Ohio, USA) 9
by James St. John

Parascytalocrinus hamiltonensis & Sarocrinus sp. (fossil crinoids) (Edwardsville Formation, Lower Mississippian; Crawfordsville, Indiana, USA) 2
by James St. John

Pyrite mass in conglomerate (Berne Member, Logan Formation, Lower Mississippian; Rt. 16 roadcut, southwest of Granville, Ohio, USA) 1
by James St. John

Aragonite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 1
by James St. John

Gray shale (Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 10
by James St. John

Vugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 2
by James St. John

"Liesegang banding" (Vinton Member, Logan Formation, Lower Mississippian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 2
by James St. John

Trace fossils in sandstone (Logan Formation, Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 7
by James St. John

Calcite-lined geode (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 2
by James St. John

Mudchips in sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 3
by James St. John

Large quartz pebble (Black Hand Sandstone, Lower MIssissippian; Hanover, Ohio, USA) 4
by James St. John

Coarse-grained sandstone (Allensville Member, Logan Formation, Lower Mississippian; Fallsburg North Outcrop, Licking County, Ohio, USA)
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 25
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 14
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 11
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 19
by James St. John

Hydrous ferrous chloride crystals
by James St. John