osagean

Vug 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) 4
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 8
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; outcrop at old interurban railway tunnel, Black Hand Gorge, Ohio, USA)
by James St. John

Zoophycos trace fossil (Logan Formation, Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 9
by James St. John

Agaricocrinus sp. (fossil crinoid) (Fort Payne Formation, Lower Mississippian; Lake Cumberland, Kentucky, USA) 2
by James St. John

Geode (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, 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) 3
by James St. John

Partially geodized crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 5
by James St. John

Quartz-pebble conglomerate (Berne Conglomerate, Lower Mississippian; Newark, Ohio, USA) 7
by James St. John

Bryozoan-encrusted crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 5
by James St. John

Black Hand Sandstone (Lower Mississippian; near Hanover, Ohio, USA) 1
by James St. John

Trace fossils in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 10
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; Black Hand Gorge, Ohio, USA) 6
by James St. John

Zoophycos in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 2
by James St. John

Biohermal mound & draping beds (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 4
by James St. John

Crinoid-rich shales (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 4
by James St. John

Trace fossil in Vinton Member siliciclastics (Logan Formation, Lower Mississippian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 9
by James St. John

Chert in limestone (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 1
by James St. John

Zoophycos in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 5
by James St. John

Calcite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 5
by James St. John

Fossiliferous sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 4
by James St. John

Mudchip in sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 1
by James St. John

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

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

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

Crinoid head (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 1
by James St. John

Sandstone-dominated overburden over "Middle Blue" shales (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 16
by James St. John

Partially geodized crinoid stem (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 6
by James St. John

Zoophycos in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 1
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; old quarry at Black Hand Gorge, Ohio, USA) 6
by James St. John

Synbathocrinus fossil crinoid (Burlington Limestone, Mississippian; Missouri, USA) 2
by James St. John

Sandstone & pebbly sandstone (Black Hand Sandstone, Lower Mississippian; cut at Cornell Steps, west of Black Hand Gorge, Ohio, USA)
by James St. John

Chertified encrinite (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 7
by James St. John

Ferruginous dolostone & pelletal glauconite beds (Floyds Knob Bed, Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 6
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; Black Hand Rock, Licking Gorge, Ohio, USA) 6
by James St. John

Zoophycos trace fossil in siliciclastics (Vinton Member, Logan Formation, Lower Mississippian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 1
by James St. John

Crinoid stems (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 17
by James St. John

Sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 4
by James St. John

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

Zoophycos trace fossil (Vinton Member, Logan Formation, Lower Mississippian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 4
by James St. John

Honeycomb weathering (Black Hand Sandstone, Lower Mississippian; Picnic Rock, Black Hand Gorge, Ohio, USA) 2
by James St. John

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 8
by James St. John

Zoophycos trace fossil in siliciclastics (Vinton Member, Logan Formation, Lower Mississippian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 6
by James St. John

Sandstone-dominated overburden over "Middle Blue" shales (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 9
by James St. John

Trace fossils in fine-grained sandstone (Henley Member, Borden Formation, Lower Mississippian; Tener Mountain roadcut, southern Ohio, USA) 11
by James St. John

Zoophycos trace fossil (Vinton Member, Logan Formation, Lower Mississippian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 5
by James St. John

Stylolite in limestone (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 4
by James St. John

Ostracods in pelletal glauconite beds (Floyds Knob Bed, Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 2
by James St. John

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

Chertified encrinite (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 6
by James St. John

Trace fossils in sandstone (Logan Formation, Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 5
by James St. John

Zoophycos trace fossil in siliciclastics (Vinton Member, Logan Formation, Lower Mississippian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 2
by James St. John

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; outcrop along old interurban line, Black Hand Gorge, Ohio, USA) 1
by James St. John

Actinocrinites gibsoni (fossil crinoid) (Edwardsville Formation, Lower Mississippian; Crawfordsville area, Montgomery County, Indiana, USA) 3
by James St. John

Crinoid head (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 2
by James St. John

Symmetrical ripple marks (Vinton Member, Logan Formation, Lower Mississippian; Dillon Reservoir railroad cut, Muskingum County, Ohio, USA)
by James St. John

Early Mississippian Crinoids and the Flowering of a Paleontologist
by James St. John

Trace fossils in sandstone (Logan Formation, Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 1
by James St. John

Encrinite (crinoidal limestone) (Ft. Payne Limestone, Lower Mississippian; Lake Cumberland, Kentucky, USA) 17
by James St. John

Geodized auloporid coral mass (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 1
by James St. John