fossiliferous

Helicoprion sp. (fossil shark tooth whorl) (Phosphoria Formation, mid-Permian; Idaho, USA) 1
by James St. John

Helicoprion sp. (fossil shark tooth whorl) (Phosphoria Formation, mid-Permian; Idaho, USA) 3
by James St. John

Ptychocarpus unitus (fossil fern) in concretion (Francis Creek Shale, Middle Pennsylvanian; Mazon Creek area, Illinois, USA) 1
by James St. John

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 105
by James St. John

Fossiliferous limestone with phylloidal algae (Putnam Hill Limestone, Middle Pennsylvanian; North River Road outcrop, Muskingum County, Ohio, USA)
by James St. John

Coiled cephalopod in concretion (Phosphoria Formation, Permian; Idaho, USA) 1
by James St. John

Lower Mercer Limestone (Middle Pennsylvanian; Clay Pit Road Outcrop, Muskingum County, Ohio, USA) 1
by James St. John

Normal fault in the Lowellville Limestone (Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 2
by James St. John

Fossiliferous flint masses in limestone (Upper Mercer Limestone, Middle Pennsylvanian; Rock Cut railroad cut, south-southeast of Dresden, Ohio, USA) 14
by James St. John

Wild Dilly Pond (San Salvador Island, Bahamas) 2
by James St. John

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

Fossiliferous limestone (Tygarts Creek Member, Slade Formation, Upper Mississippian; Clack Mountain Road Outcrop, south of Morehead, Kentucky, USA) 1
by James St. John

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

Dixon Cave & info. (Mammoth Cave National Park, Kentucky, USA)
by James St. John

Ellipsocephalus hoffii (fossil trilobites) (Jince Formation, Middle Cambrian; vicinity of Jince, Stredocesky Region, Bohemia, Czech Republic) 5
by James St. John

Anthracospirifer occiduus brachiopod in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA) 2
by James St. John

Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 8
by James St. John

Coquina 1
by James St. John

Favistina stellata (fossil coral) (Upper Ordovician; Pewee Valley, Kentucky, USA) 2
by James St. John

Mancos Shale badlands (Upper Cretaceous; Dinosaur National Monument, Utah, USA) 5
by James St. John

Xenocrinus baeri (fossil crinoid) (Whitewater Formation, Upper Ordovician; Caesar Creek State Park, Warren County, Ohio, USA)
by James St. John

Normal fault in the Lowellville Limestone (Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 5
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 15
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; eastern Ohio, USA) 24
by James St. John

Frost-highlighted fossiliferous limestone (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 2
by James St. John

Interbedded limestones and shales (Cincinnatian Series, Upper Ordovician; highwall along Flat Fork, Warren County, Ohio, USA) 4
by James St. John

Composita subtilita brachiopod in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA)
by James St. John

Hexagonaria sp. (fossil coral) (Devonian; Lake Michigan shoreline, near Bay View, Michigan, USA) 1
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; eastern Ohio, USA) 47
by James St. John

Wavy-bedded fossiliferous limestone (Putnam Hill Limestone, Middle Pennsylvanian; Rt. 541 roadcut, west of Tunnel Hill, Coshocton County, Ohio, USA) 7
by James St. John

Fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 24
by James St. John

Pentamerid brachiopods in dolostone (Racine Formation, Middle Silurian; Grafton, Illinois, USA) 2
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; eastern Ohio, USA) 13
by James St. John

Fossiliferous limestone (Delaware Limestone, Middle Devonian; Olentangy River at Lazarus Run confluence, Delaware County, Ohio, USA) 11
by James St. John

Crinoidal limestone (Kope Formation, Upper Ordovician; Cincinnati area, USA) 2
by James St. John

Fossiliferous sandstone (Logan Formation, Lower Mississippian; Walhonding Road Outcrop, Knox County, Ohio, USA) 8
by James St. John

Charcoal debris horizon in bituminous coal (Lower Mercer Coal, Pottsville Group, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 1
by James St. John

Chertified fossiliferous oolitic limestone boulder in conglomerate ("Sharon Conglomerate", Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 3
by James St. John

Anthracopupa ohioensis (fossil land snails) in fossiliferous nonmarine limestone (Monongahela Group, Upper Pennsylvanian; Narrows Run North roadcut, Belmont County, eastern Ohio, USA) 4
by James St. John

Cyrtospirifer disjunctus (fossil brachiopod) (Chemung Group, Devonian; southwestern New York State, USA) 1
by James St. John

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

Charcoal debris horizon in bituminous coal (Lower Mercer Coal, Pottsville Group, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 3
by James St. John

Silicified rugose corals in fossiliferous limestone (Rico Formation, Upper Pennsylvanian; Grand County, Utah, USA) 1
by James St. John

Frost-highlighted fossiliferous limestone (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 7
by James St. John

Stereospyroceras sp. (fossil cephalopod) in limestone (Champlain Black Marble) (Crown Point Limestone, Middle Ordovician; Vermont, USA) 3
by James St. John

Fossiliferous shale (Lower Mercer Shale, Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 2
by James St. John

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

Gastropod fossil with encrusting stromatoporoid (Columbus Limestone, Middle Devonian; Columbus, Ohio, USA)
by James St. John

Fenestrate bryozoan in shale (Lower Mercer Shale, Middle Pennsylvanian; Rock Cut railroad cut, south-southeast of Dresden, Ohio, USA)
by James St. John

Brachiopods in limestone (Richmondian Stage, Upper Ordovician; Southgate Hill roadcut, Indiana, USA) 3
by James St. John

Fossiliferous limestone (Delaware Limestone, Middle Devonian; Olentangy River at Lazarus Run confluence, Delaware County, Ohio, USA) 10
by James St. John

Fossiliferous sandstone (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam emergency spillway, western Coshocton County, Ohio, USA) 10
by James St. John

Ferruginous limestone (Boggs Member, Middle Pennsylvanian; Frazeysburg Pit, Muskingum County, Ohio, USA) 19
by James St. John

Sparry fossiliferous limestone (Corryville Member, McMillan Formation, Upper Ordovician; Flemingsburg South roadcut, Fleming County, Kentucky, USA) 2
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 48
by James St. John

Boggs Member (Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 1
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 14
by James St. John

Interbedded limestones and shales (Cincinnatian Series, Upper Ordovician; highwall along Flat Fork, Warren County, Ohio, USA) 6
by James St. John

Wavy-bedded fossiliferous limestone (Putnam Hill Limestone, Middle Pennsylvanian; Rt. 541 roadcut, west of Tunnel Hill, Coshocton County, Ohio, USA) 8
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 21
by James St. John