fossiliferous

Pecopteris sp. (fossil fern) (Mazon Creek Lagerstätte, Francis Creek Shale, Middle Pennsylvanian; Mazon Creek area, Illinois, USA) 4
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 17
by James St. John

"Solenopora" jurassica (fossil red algae) in limestone (White Limestone Formation, Middle Jurassic, 165-168 Ma; Foss Cross Quarry, Gloucestershire, England) 3
by James St. John

Silicified rugose coral (Columbus Limestone, Middle Devonian; Mt. Tabor, Ohio, USA)
by James St. John

Fossiliferous limestone (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 17
by James St. John

Fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 2
by James St. John

Mancos Shale badlands (Upper Cretaceous; Dinosaur National Monument, Utah, USA) 3
by James St. John

Partially silicified Hexagonaria (fossil coral) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 5
by James St. John

Maxville Limestone (Mississippian; Jonathan Run, north-northwest of Fultonham, Ohio, USA) 32
by James St. John

Fossiliferous mudshale (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, Cumberland County, Kentucky, USA)
by James St. John

Fossiliferous limestone & fossiliferous shale (Skelley Member, Upper Pennsylvanian; Caldwell West outcrop, Ohio, USA) 35
by James St. John

Trilobite packstone (Alum Shale Formation, Upper Cambrian; Kinnekulle Outlier, Västergötland, Sweden) 19
by James St. John

"Solenopora" jurassica (fossil red algae) in limestone (Fieldbrash Deposit, Middle Jurassic; Cirencester, Gloucestershire, England) 4
by James St. John

Pyritized auloporid corals encrusting a Paraspirifer bownockeri brachiopod (Silica Formation, Middle Devonian; quarry in Lucas County, Ohio, USA) 5
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 14
by James St. John

Upper Mercer Flint & Upper Mercer Limestone (Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA) 3
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 1
by James St. John

Middle Mercer Coal below the Lower Mercer Limestone (Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 1
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 7
by James St. John

Stromatoporoid (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 18
by James St. John

Frost-highlighted fossiliferous limestone (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 13
by James St. John

Fossiliferous limestone with crinoid stems (Putnam Hill Limestone, Middle Pennsylvanian; waste rock pile from old clay mine along Blunt Run, Muskingum Township, Muskingum County, Ohio, USA) 6
by James St. John

Fossiliferous limestone with crinoid stems (Putnam Hill Limestone, Middle Pennsylvanian; waste rock pile from old clay mine along Blunt Run, Muskingum Township, Muskingum County, Ohio, USA) 8
by James St. John

Teleoceras major (fossil barrel-bodied rhino) in volcanic tuff (Ash Hollow Formation, Miocene, 11.83 Ma; Ashfall Fossil Beds, Nebraska, USA) 27
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 2
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 21
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 15
by James St. John

Brachiopod fossils in sandstone (Byer Sandstone, Lower Mississippian; west of Toboso, Ohio, USA) 8
by James St. John

Fossiliferous limestone with crinoid stems (Putnam Hill Limestone, Middle Pennsylvanian; waste rock pile from old clay mine along Blunt Run, Muskingum Township, Muskingum County, Ohio, USA) 9
by James St. John

Upper Mercer Limestone over Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 10
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 16
by James St. John

Fossiliferous limestone (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 11
by James St. John

Brachiopod fossil (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 4
by James St. John

Fossiliferous sulfidic shale (Kupferschiefer Formation, Upper Permian; near Eisleben, Germany) 1
by James St. John

Grypania spiralis (Negaunee Iron-Formation, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 26
by James St. John

Lower Mercer Limestone & Boggs Member (Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 2
by James St. John

Weathered, oxidized pyrite (Columbus Limestone or Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 3
by James St. John

Nautiloid cephalopod (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 4
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 19
by James St. John

Fossiliferous limestone (Delaware Limestone, Middle Devonian; Olentangy River at Lazarus Run confluence, Delaware County, Ohio, USA) 14
by James St. John

Rugose coral in fossiliferous limestone (Middle Devonian) 4
by James St. John

Stromatoporoid (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 8
by James St. John

Fossiliferous sandstone (Logan Formation, Lower Mississippian; eastern Ohio, USA) 2
by James St. John

Norfolk Southern freight train (23 November 2018) (Miamisburg, Ohio, USA) 2
by James St. John

Fossiliferous limestone (Columbus Limestone; Middle Devonian; Ohio, USA) 7
by James St. John

Large favositid coral colony in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 4
by James St. John

Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 10
by James St. John

Archaeocyathan limestone (Ajax Limestone, Lower Cambrian; Ajax Mine, South Australia) 4
by James St. John

Productid brachiopod in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 1
by James St. John

Glyptocrinus decadactylus (fossil crinoid) (Fairview Formation, Upper Ordovician; Mason County, Kentucky, USA)
by James St. John

Pecopteris sp. (fossil fern) (Mazon Creek Lagerstätte, Francis Creek Shale, Middle Pennsylvanian; Mazon Creek area, Illinois, USA) 1
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

Flint-knapped spearpoint (Flint River Chert, Oligocene; near Albany, Georgia, USA) 3
by James St. John

Fluvial gravel bar (Salt Creek, Haynes, Hocking County, Ohio, USA) 1
by James St. John

Grypania spiralis (Negaunee Iron-Formation, Paleoproterozoic, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 46
by James St. John

Grypania spiralis (Negaunee Iron-Formation, Paleoproterozoic, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 47
by James St. John

Fossiliferous sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 5
by James St. John

"Solenopora" jurassica (fossil red algae) in limestone (Fieldbrash Deposit, Middle Jurassic; Cirencester, Gloucestershire, England) 1
by James St. John

Fossiliferous limestone with crinoid stems (Putnam Hill Limestone, Middle Pennsylvanian; waste rock pile from old clay mine along Blunt Run, Muskingum Township, Muskingum County, Ohio, USA) 1
by James St. John

Fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 40
by James St. John