fossiliferous

New Albany Shale over North Vernon Limestone (Upper Devonian over Middle Devonian; Interstate 65 entrance ramp roadcut, Bullitt County, Kentucky, USA) 3
by James St. John

Upper Mercer Limestone over Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 6
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 66
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 33
by James St. John

Leptaena fossil brachiopod in fossiliferous limestone (Middle Devonian; Olentangy River bank near Lazarus Run, Delaware County, Ohio, USA) 3
by James St. John

Upper Mercer Flint & Upper Mercer Limestone (Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA) 2
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 24
by James St. John

Fossiliferous sulfidic shale (Kupferschiefer Formation, Upper Permian; Mansfeld District, Germany) 4
by James St. John

Historic Entrance (Mammoth Cave, Kentucky, USA) 7
by James St. John

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

Agnostus pisiformis fossil trilobites (Alum Shale Formation, upper Middle Cambrian; Andrarum, Scania, Sweden) 3
by James St. John

Helicoprion ferrieri (fossil shark tooth whorl) in phosphatic limestone (Phosphoria Formation, mid-Permian; Waterloo Mine, near Montpelier, Idaho, USA) 1
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) 6
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 86
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 47
by James St. John

Fossiliferous limestone (Hinton or Bluefield Formation, Upper Mississippian; Rt. 460 roadcut between Oakvale & Kellysville, West Virginia, USA) 7
by James St. John

Mammut americanum (American mastodon) (Pleistocene; Ziegler Reservoir, Snowmass Village, Colorado, USA) 30
by James St. John

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

Fossiliferous cannel coal (Upper Freeport Coal, Middle Pennsylvanian; Diamond Coal Mine, Linton, Ohio, USA) 1
by James St. John

Fossiliferous limestones (Marblehead Member, Columbus Limestone, Middle Devonian; lakehore outcrop near Marblehead Lighthouse, Ottawa County, Ohio, USA) 16
by James St. John

Helicoprion sp. (fossil shark tooth whorl) in black concretionary phosphorite (Morris Member, Phosphoria Formation, mid-Permian; Waterloo Mine, Bear Lake County, Idaho, USA)
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 29
by James St. John

Ohio Statehouse (Columbus, Ohio, USA) 5
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 65
by James St. John

Fossiliferous bituminous coal (Clarion Coal, Middle Pennsylvanian; Prattsville West Roadcut, Vinton County, Ohio, USA) 7
by James St. John

Fossiliferous phosphorite (Fish Scale Marker Bed, Meade Peak Member, Phosphoria Formation, Permian; Idaho, USA) 1
by James St. John

Partially silicified Hexagonaria (fossil coral) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 7
by James St. John

View Point fossiliferous clast
by euphro

Historic Entrance (Mammoth Cave, Kentucky, USA) 34
by James St. John

Fossiliferous dolostone (Rockford Limestone, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 11
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 73
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 30
by James St. John

Fossiliferous mudshale (Hinton or Bluefield Formation, Upper Mississippian; Oakvale School Outcrop - Rt. 112 roadcut, Oakvale, West Virginia, USA) 3
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) 08
by James St. John

Fossiliferous limestone with phylloidal algae (Lower Mercer Limestone, Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 1
by James St. John

Helicoprion ferrieri (fossil shark tooth whorl) in phosphatic limestone (Phosphoria Formation, mid-Permian; Waterloo Mine, near Montpelier, Idaho, USA) 2
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 3
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) 34
by James St. John

Helicoprion ferrieri (fossil shark tooth whorl) in phosphatic limestone (Phosphoria Formation, mid-Permian; Waterloo Mine, near Montpelier, Idaho, USA) 3
by James St. John

Pottsville Group over Maxville Limestone (Black 17 Mine, White Cottage, Ohio, USA) 21
by James St. John

Plant fossil in claystone (Pekin Formation, Upper Triassic; Boren Clay Pit, Gulf, North Carolina, USA) 3
by James St. John

Teleoceras major (baby barrel-bodied rhino) (Ash Hollow Formation, Miocene, 11.83 Ma; Ashfall Fossil Beds, Nebraska, 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) 25
by James St. John

Upper Mercer Limestone over Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 7
by James St. John

Pottsville Group over Maxville Limestone (Black 17 Mine, White Cottage, Ohio, USA) 26
by James St. John

Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 10
by James St. John

Fossiliferous flint masses in limestone (Upper Mercer Limestone, Middle Pennsylvanian; Rock Cut railroad cut, south-southeast of Dresden, Ohio, USA) 10
by James St. John

Natural Bridge of Virginia (Natural Bridge State Park, Virginia, USA) 5
by James St. John

Lower Mercer Shale-Lower Mercer Limestone (Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 3
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 82
by James St. John

Interbedded fossiliferous limestones and shales (Fairview Formation, Upper Ordovician; upper cut, Maysville West roadcut, Kentucky, USA) 2
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 67
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 74
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 52
by James St. John

Pottsville Group over Maxville Limestone (Black 17 Mine, White Cottage, Ohio, USA) 27
by James St. John

Volcanic tuff (bentonite) (ash-fall tuff) (Split Fish Layer, Fossil Butte Member, Green River Formation, Lower Eocene; Promised Lands Quarry, Hams Fork Plateau, southwestern Wyoming, USA) 1
by James St. John

Conus spuroides fossil cone snail shells (Caloosahatchee Formation, Upper Pliocene-Lower Pleistocene; gravel pit in southwestern Florida, USA) 2
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) 06
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 35
by James St. John

Ferruginous limestone (Boggs Member, Middle Pennsylvanian; Frazeysburg Pit, Muskingum County, Ohio, USA) 13
by James St. John