fossiliferous

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 12
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 76
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 50
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 58
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 28
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 3
by James St. John

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

Tullimonstrum gregarium (fossil problematicum) (Mazon Creek Lagerstätte, Middle Pennsylvanian; Mazon Creek area, Illinois, USA) 2
by James St. John

Fossiliferous bituminous coal (Clarion Coal, Middle Pennsylvanian; Prattsville West Roadcut, Vinton County, Ohio, USA) 10
by James St. John

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

Anthracospirifer fossil brachiopod in fossiliferous limestone (Boggs Member, Pottsville Group, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 2
by James St. John

Platystrophia ponderosa (fossil brachiopod) (Grant Lake Formation, Upper Ordovician; south of Excello, Ohio, USA) 3
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 56
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 67
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; eastern Ohio, USA) 14
by James St. John

Intraclastic bioclastic dolostone (upper Boggs Limestone, middle Pottsville Group, lower Middle Pennsylvanian; subcrop in Symmes Creek, northern Muskingum County, eastern Ohio, USA) 2
by James St. John

Nonmarine ostracod limestone (Benwood Limestone, Upper Pennsylvanian; Route 7 roadcut north of Narrows Run, Belmont County, Ohio, USA) 3
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 55
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 27
by James St. John

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

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 20
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 2
by James St. John

Dixon Cave (Mammoth Cave National Park, Kentucky, USA) 9
by James St. John

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

Ophiocrossota sp. (fossil brittle star) in fossiliferous sandy limestone (Santa Margarita Formation, Miocene; Lopez Lake area, San Luis Obispo County, California, USA) 3
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) 50
by James St. John

Fossiliferous sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 11
by James St. John

Fasciculiconcha knightii (fossil bivalve) (Upper Mercer Limestone, Middle Pennsylvanian; Rock Cut railroad cut, south-southeast of Dresden, Ohio, USA) 3
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 40
by James St. John

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

Columbus Limestone (Middle Devonian) (Hayden Run, Dublin, Ohio, USA) 4
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) 7
by James St. John

Well cuttings from the VanWinkle Unit # 1 petroleum well (west of Granville, Ohio, USA) 3
by James St. John

Fossiliferous cannel coal (Upper Freeport Coal, Middle Pennsylvanian; Diamond Coal Mine, Linton, Ohio, USA) 3
by James St. John

Brachiopods in limestone (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 2
by James St. John

Columbus Limestone (Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 1
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 23
by James St. John

Stylolite in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA)
by James St. John

Silicified rugose corals in fossiliferous limestone (Honaker Trail Formation, Upper Pennsylvanian; Grand County, Utah, USA) 3
by James St. John

Fossiliferous mudshale (Hinton or Bluefield or Bluefield Formation, Upper Mississippian; Oakvale School Outcrop - Rt. 112 roadcut, Oakvale, West Virginia, USA) 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) 11
by James St. John

Geneva Dolomite Member of the Jeffersonville Limestone (Lower Devonian) over the Louisville Limestone-Waldron Shale-Laurel Member (Middle Silurian) (St. Paul Stone Quarry, St. Paul, Indiana, USA) 2
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 14
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 18
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 33
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) 18
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 57
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 39
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 6
by James St. John

Hexagonaria sp. (fossil coral) (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 26
by James St. John

Dixon Cave (Mammoth Cave National Park, Kentucky, USA) 10
by James St. John

Tentaculites richmondensis in limestone (Waynesville Formation, Upper Ordovician; Whistle Creek, Franklin County, Indiana, USA)
by James St. John

Kallidecthes richardsoni (fossil shrimp) (Mazon Creek Lagerstätte, Francis Creek Shale, Middle Pennsylvanian; coal mine dump pile near Essex, northern Illinois, USA)
by James St. John

Fossil charcoal in sandstone (Pottsville Group, Middle Pennsylvanian; Symmes Creek outcrop, northern 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) 4
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Taylor & Bell Quarry, near Marble Cliff, Ohio, USA) 14
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 9
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 14
by James St. John

Fossil fish bones in limestone (basal Delaware Limestone, Middle Devonian; eastern bank of the Scioto River, Columbus, Ohio, USA) 1
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 22
by James St. John