devonian

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 171
by James St. John

Stylolite in limestone (Middle Devonian; quarry northwest of Paulding, Ohio, USA) 7
by James St. John

Crocus sp. (Newark, Ohio, USA) 2
by James St. John

Pecopteris carbonized fossil ferns (Pennsylvanian)
by James St. John

Kimberlite (Arkhangelskaya Pipe, Late Devonian; Arkhangelsk Region, Russia) 9
by James St. John

Columbus Limestone (Middle Devonian) (Hayden Run, Dublin, Ohio, USA) 1
by James St. John

Emeralds-garnets-tourmaline in pegmatitic granite (Crabtree Pegmatite, Devonian; Crabtree Mountain, Mitchell County, North Carolina, USA) 4
by James St. John

Metasequoia glyptostroboides (dawn redwood cone) 3
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 170
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 185
by James St. John

Eclogite (Muenchberg Gneiss Massif; Early Ordovician protolith, about 480 Ma; Late Devonian metamorphism, about 365 Ma; Weissenstein, Bavaria, Germany) 4
by James St. John

Stigmaria fossil root (Newark, Ohio, USA) 2
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 165
by James St. John

Contact at top of softer, recessed rock in Manlius Formation
by Kyle Hartshorn

Recessed Manlius Formation zone
by Kyle Hartshorn

Looking off trail
by Kyle Hartshorn

Model of Dunkleosteus terrelli (fossil placoderm) (Late Devonian; Cleveland, Ohio, USA) 6
by James St. John

Glacial grooves from Pleistocene glaciation on Columbus Limestone (Middle Devonian) (Glacial Grooves State Park, Kelleys Island, Ohio, Lake Erie, USA) 1
by James St. John

Pyrite concretion (Chattanooga Shale, Upper Devonian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3
by James St. John

Dunkleosteus sp. (fossil fish lower jaw) (Ohio Shale, Upper Devonian; Lorain County, Ohio, USA)
by James St. John

Calcite (Muscatatuck Group, Middle Devonian; Rensselear Stone Quarry, Pleasant Ridge, Indiana, USA) 2
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 158
by James St. John

Sphalerite on Devonian dolostone (Auglaize Quarry, near Junction, Ohio, USA)
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 159
by James St. John

Lafarge Marblehead Quarry (Marblehead Peninsula, Ohio, USA) 3
by James St. John

Fossil ferns (Pennsylvanian; Coal Ridge Mine, Noble County, Ohio, USA) 1
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 34
by James St. John

Kimberlite (Lomonosovskaya Pipe, Late Devonian; Arkhangelsk Region, Russia) 3
by James St. John

Kita no Taiko -- Mitz
by patternghosts

Dolostone breccia (Mackinac Breccia, Devonian; Interstate-75 exit near St. Ignace, Upper Peninsula of Michigan, USA) 2
by James St. John

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

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 162
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 163
by James St. John

Bothriolepis canadensis fossil fish (Escuminac Formation, Upper Devonian; Miguasha, southern Gaspe Peninsula, Quebec, Canada)
by James St. John

Fossil fish bones in limestone (basal Delaware Limestone, Middle Devonian; eastern bank of the Scioto River, Columbus, Ohio, USA) 2
by James St. John

Garnet schist (Waits River Formation, Devonian; Route 9 roadcut between Marlboro & Brattleboro, Vermont, USA) 2
by James St. John

Millikin Falls (Columbus, Ohio, USA) 2
by James St. John

Cannabis sativa (marijuana plant) (Zanesville, Ohio, USA)
by James St. John

Indian Ladder Trail
by Kyle Hartshorn

Hummocky bedding in Coeymans Formation
by Kyle Hartshorn

Coeymans Formation
by Kyle Hartshorn

Limestone with chert nodule (Columbus Limestone, Middle Devonian; Mt. Tabor, Ohio, USA) 5
by James St. John

White fossiliferous chert in limestone (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 4
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 160
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 169
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 179
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 110
by James St. John

Clevelandodendron ohioensis (fossil club moss) (Ohio Shale, Upper Devonian; Cleveland, Ohio, USA) 6
by James St. John

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Sullivant Quarry, Columbus, Ohio, USA) 53
by James St. John

Sabal palmetto (cabbage palm trees) (Sanibel Island, Florida, USA) 1
by James St. John

40013 & 40145 TnT 47828
by CA850

Another Devonian locality
by GOC53

Pyrite concretions in black shale (Blocher Member, New Albany Shale, Devonian; Harding Street Quarry, Indianapolis, Indiana, USA) 1
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 166
by James St. John

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 172
by James St. John

Ohio Shale-Olentangy Shale disconformity (Upper Devonian; Highbanks Park, Lewis Center, Ohio, USA) 3
by James St. John

Kimberlite (Lomonosovskaya Pipe, Late Devonian; Arkhangelsk Region, Russia) 1
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

Glacial grooves on limestone (Kelleys Island, Lake Erie, Ohio, USA) 182
by James St. John

Enfield Glen
by Kyle Hartshorn