Wikimedi'Òc

Devonian Rocks - geograph.org.uk - 395151.jpg - GeographBot

Rhynie Chert from Scotland 1409.jpg - GeoWriter

Agpaite (pegmatitic peralkline nepheline syenite) (Khibina Massif, Late Devonian, 362-365 Ma; Nyorkpakhk Mountain, Kola Peninsula, far-nw Russia) (14838565410).jpg - Ser Amantio di Nicolao

Astrophyllitic agpaite (pegmatitic peralkaline nepheline syenite with astrophyllite) (Khibina Massif, Late Devonian, 362-365 Ma; Kola Peninsula, far-nw Russia) 1 (15024859092).jpg - Ser Amantio di Nicolao

Striated cone-in-cone limestone (likely an interbed from the Ohio Shale, Upper Devonian; creek bed of an Alum Creek tributary, northern Delaware County, Ohio, USA) 1 (16986580988).jpg - Ser Amantio di Nicolao

Astrophyllitic agpaite (peralkaline nepheline syenite with astrophyllite) (Khibina Massif, Late Devonian, 362-365 Ma; Kola Peninsula, far-nw Russia) 2 (27801919972).jpg - Ser Amantio di Nicolao

Symmetrical ripple marks (Berea Sandstone, Upper Devonian-Lower Mississippian; Blendon Woods Park, Columbus, Ohio, USA) 1 (35803048116).jpg - Ser Amantio di Nicolao

Gray clayshales (Bedford Shale, Upper Devonian; Blendon Woods Park, Columbus, Ohio, USA) 1 (35678712202).jpg - Ser Amantio di Nicolao

Gray clayshales (Bedford Shale, Upper Devonian; Blendon Woods Park, Columbus, Ohio, USA) 9 (35847698995).jpg - Ser Amantio di Nicolao

Shale (Upper Devonian; Cashaqua Creek, Livingston County, New York State, USA) (39887179540).jpg - Ser Amantio di Nicolao

Black shale (New Albany Shale, Upper Devonian; Clark County, Indiana, USA) (41694033411).jpg - Ser Amantio di Nicolao

Dolostone breccia (Mackinac Breccia, Devonian; Interstate-75 exit near St. Ignace, Upper Peninsula of Michigan, USA) 2 (40975889854).jpg - Ser Amantio di Nicolao

Black chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 2 (42189051211).jpg - Ser Amantio di Nicolao

Chert (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) (45839063185).jpg - Ser Amantio di Nicolao

Bioturbated limestone (Silica Formation, Middle Devonian; Benchmark Materials-France Stone Company Sylvania Quarry, Lucas County, Ohio, USA) (48372839127).jpg - Ser Amantio di Nicolao