fossiliferous

Fossiliferous mudshale (Boggs Shale, Pottsville Group, Pennsylvanian; Blunt Run, Muskingum County, Ohio, USA) 3
by James St. John

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

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 11
by James St. John

Cougar Point Welded Ash-Flow Tuff (Miocene, 10.5-12.5 Ma; near Grasmere, Idaho, USA) 3
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 5
by James St. John

East River Valley & Gothic Mountain (Gunnison County, Colorado, USA) 2
by James St. John

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

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 9
by James St. John

Fossiliferous grey micrite
by Kyle Hartshorn

Trace fossils in limestone (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 5
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) 32
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 2
by James St. John

Modiolus-Septimyalina decalcified bivalve pavement in mudshale (crinkle bed) (Hinton or Bluefield Formation, Upper Mississippian; Oakvale School outcrop - Rt. 112 roadcut through Divide Ridge, Mercer County, West Virginia, USA) 2
by James St. John

Mioplosus labracoides & Knightia eocaena fossil fish (Green River Formation, Lower Eocene; Fossil Lake Basin, southwestern Wyoming, USA)
by James St. John

Minor back thrust fault in interbedded fossiliferous limestones and shales (Fairview Formation, Upper Ordovician; upper cut, Maysville West roadcut, Kentucky, USA) 5
by James St. John

Stromatoporoid (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 15
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 69
by James St. John

Maxville Limestone (Mississippian; East Fultonham Pit, Muskingum County, Ohio, USA) 10
by James St. John

Columbus Limestone (Middle Devonian) (Hayden Falls, Dublin, Ohio, USA) 3
by James St. John

Ferruginous limestone (Boggs Member, Middle Pennsylvanian; Frazeysburg Pit, Muskingum County, Ohio, USA) 5
by James St. John

Posidonia fossil bivalve (Lowellville Shale, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 4
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 78
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 25
by James St. John

Esconites zelus (fossil worm) (Mazon Creek Lagerstätte, Middle Pennsylvanian; Mazon Creek area, Illinois, USA) 1
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) 24
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 8
by James St. John

Delaware Limestone over Columbus Limestone (Middle Devonian; Griggs Dam, Columbus, Ohio, USA) 5
by James St. John

Chertified fossiliferous oolitic limestone boulder in conglomerate ("Sharon Conglomerate", Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 1
by James St. John

Trace fossils in limestone (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 3
by James St. John

"Solenopora" jurassica (fossil red algae) in limestone (Fieldbrash Deposit, Middle Jurassic; Cirencester, Gloucestershire, England) 2
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 12
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 18
by James St. John

Archaeocyathan limestone (Ajax Limestone, Lower Cambrian; Ajax Mine, South Australia) 31
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 20
by James St. John

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

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

Upper Mercer Limestone over Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 12
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 68
by James St. John

Pottsville Group over Maxville Limestone (Black 17 Mine, White Cottage, Ohio, USA) 16
by James St. John

Productid brachiopod in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA) 4
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 8
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 31
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 64
by James St. John

International Subcommission on Cambrian Stratigraphy group photo (House Range, Utah, USA)
by James St. John

Fustiglyphus trace fossil (Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 2
by James St. John

Fossiliferous limestone (Poverty Run Limestone, Lower Pennsylvanian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 3
by James St. John

Fisherites reticulatus fossil algae (Kimmswick Formation, Upper Ordovician; riverbed near Ste. Genevieve, Missouri, USA) 2
by James St. John

Trace fossils in limestone (Boggs Limestone, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 1
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 6
by James St. John

Horseshoe Falls (19 November 2017) (Flat Fork, Warren County, Ohio, USA) 13
by James St. John

Trilobite packstone (Alum Shale Formation, Upper Cambrian; Kinnekulle Outlier, Västergötland, Sweden) 4
by James St. John

Upper Mercer Limestone over Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 13
by James St. John

Acanthopecten carboniferous (fossil scallop shell) (Lower Mercer Shale, Pottsville Group, Middle Pennsylvanian; Berry Run, Flint Ridge, Ohio, USA)
by James St. John

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

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 16
by James St. John

Sparry fossiliferous limestone (Corryville Member, McMillan Formation, Upper Ordovician; Flemingsburg South roadcut, Fleming County, Kentucky, USA) 3
by James St. John

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

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

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

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