crinoid

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 96
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 98
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 79
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 9
by James St. John

Columbus Limestone (Middle Devonian; southern shore of Kelleys Island, Lake Erie, Ohio, USA) 6
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 4
by James St. John

Columbus Limestone (Middle Devonian; southern shore of Kelleys Island, Lake Erie, Ohio, USA) 9
by James St. John

Lower Mercer Limestone (Middle Pennsylvanian; Frazeysburg Pit, Muskingum County, Ohio, USA) 3
by James St. John

Columbus Limestone (Middle Devonian; North Side Quarry, Kelleys Island, Lake Erie, Ohio, USA) 3
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 9
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 11
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 91
by James St. John

Columbus Limestone (Middle Devonian; Lafarge Kelleys Island Quarry, Kelleys Island, Lake Erie, Ohio USA) 37
by James St. John

Auloporid corals in limestone (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 6
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 15
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 12
by James St. John

Fossiliferous dolostone (Rockford Limestone, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 8
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 92
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 104
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 1
by James St. John

some tiny aeolid nudi, teluk maya night, wakatobi, 2018
by q.phia

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 17
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 95
by James St. John

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

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 97
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 10
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 18
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 19
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 86
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 7
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 94
by James St. John

Columbus Limestone (Middle Devonian; southern shore of Kelleys Island, Lake Erie, Ohio, USA) 3
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 76
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 90
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 5
by James St. John

Crinoidal carboniferous limestone with coral. Nell's Point Barry, West of docks. August 30th 1983
by Mary Gillham Archive Project

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 10
by James St. John

Columbus Limestone (Middle Devonian; southern shore of Kelleys Island, Lake Erie, Ohio, USA) 1
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Melvin Stone Quarry, near Williamsport, Pickaway County, Ohio, USA) 4
by James St. John

Putnam Hill Limestone (Middle Pennsylvanian; Rt. 79 roadcut, Perry Township, Coshocton County, Ohio, USA) 20
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 1
by James St. John

Putnam Hill Limestone (Middle Pennsylvanian; Rt. 79 roadcut, Perry Township, Coshocton County, Ohio, USA) 22
by James St. John

Silica Formation (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 2
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 16
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 83
by James St. John

Fort Payne Formation over Rockford Limestone (Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 11
by James St. John

Columbus Limestone (Middle Devonian; North Side Quarry, Kelleys Island, Lake Erie, Ohio, USA) 5
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 3
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 88
by James St. John

Columbus Limestone (Middle Devonian; North Side Quarry, Kelleys Island, Lake Erie, Ohio, USA) 6
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 2
by James St. John

Columbus Limestone (Middle Devonian; southern shore of Kelleys Island, Lake Erie, Ohio, USA) 4
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 5
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 8
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 6
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 71
by James St. John

Columbus Limestone (Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 12
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 4
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 2
by James St. John

Silica Formation over Dundee Limestone (Middle Devonian; Lafarge Paulding Quarry, near Paulding, Ohio, USA) 81
by James St. John