ordovician

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Folded calcareous shale (Sevier Formation, Middle Ordovician; Bays Mountain roadcut, Tennessee, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/36852174921.html" target="_blank"><img src="http://farm5.static.flickr.com/4346/36852174921_ed937ebcdf_m.jpg" alt="" /></a><br />Folded calcareous shale (Sevier Formation, Middle Ordovician; Bays Mountain roadcut, Tennessee, USA) 4 / James St. John</span>

サイズ変更など

Isotelus maximus (fossil trilobite) (Waynesville Formation, Upper Ordovician; Adams County, Ohio, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/20474403984.html" target="_blank"><img src="http://farm1.static.flickr.com/704/20474403984_ebdbebed2e_m.jpg" alt="" /></a><br />Isotelus maximus (fossil trilobite) (Waynesville Formation, Upper Ordovician; Adams County, Ohio, USA) 1 / James St. John</span>

サイズ変更など

Spar-filled vug
by Kyle Hartshorn

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14293570474.html" target="_blank"><img src="http://farm4.static.flickr.com/3694/14293570474_867bc3997b_m.jpg" alt="" /></a><br />Spar-filled vug / Kyle Hartshorn</span>

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Phyllograptus typus fossil graptolite (Middle Ordovician; Ibex Springs, Utah, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/17203626188.html" target="_blank"><img src="http://farm9.static.flickr.com/8692/17203626188_177585b2a1_m.jpg" alt="" /></a><br />Phyllograptus typus fossil graptolite (Middle Ordovician; Ibex Springs, Utah, USA) 2 / James St. John</span>

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Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50746058341.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50746058341_c88fb075ba_m.jpg" alt="" /></a><br />Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 2 / James St. John</span>

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Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51021758037.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51021758037_3f81baba55_m.jpg" alt="" /></a><br />Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 3 / James St. John</span>

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Fossiliferous limestone (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 13
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/45091254034.html" target="_blank"><img src="http://farm5.static.flickr.com/4806/45091254034_02c973d482_m.jpg" alt="" /></a><br />Fossiliferous limestone (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 13 / James St. John</span>

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Rusophycus pudicum trilobite trace fossils (Fairview Formation, Upper Ordovician; Hamilton County, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/30113604781.html" target="_blank"><img src="http://farm6.static.flickr.com/5016/30113604781_8c60732a96_m.jpg" alt="" /></a><br />Rusophycus pudicum trilobite trace fossils (Fairview Formation, Upper Ordovician; Hamilton County, Ohio, USA) 2 / James St. John</span>

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Cupulocrinus sp. (fossil crinoids) (Upper Ordovician; Brechin, Ontario, Canada) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34967345304.html" target="_blank"><img src="http://farm5.static.flickr.com/4207/34967345304_b8648801e8_m.jpg" alt="" /></a><br />Cupulocrinus sp. (fossil crinoids) (Upper Ordovician; Brechin, Ontario, Canada) 1 / James St. John</span>

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Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51188158587.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51188158587_94da22df45_m.jpg" alt="" /></a><br />Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 6 / James St. John</span>

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Mud adhesion ripples (Fairview Formation or Bellevue Limestone, Upper Ordovician; Maysville West roadcut, Kentucky, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/45476721661.html" target="_blank"><img src="http://farm2.static.flickr.com/1958/45476721661_e2c69299d8_m.jpg" alt="" /></a><br />Mud adhesion ripples (Fairview Formation or Bellevue Limestone, Upper Ordovician; Maysville West roadcut, Kentucky, USA) 5 / James St. John</span>

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Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 15
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51943242913.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51943242913_4e7a62b656_m.jpg" alt="" /></a><br />Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 15 / James St. John</span>

サイズ変更など

Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51189634164.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51189634164_8ba67a6d72_m.jpg" alt="" /></a><br />Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 1 / James St. John</span>

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DSC_3887
by Kyle Hartshorn

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/24601934880.html" target="_blank"><img src="http://farm2.static.flickr.com/1547/24601934880_521bdbd09f_m.jpg" alt="" /></a><br />DSC_3887 / Kyle Hartshorn</span>

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Abronia elliptica (sand verbena) (north of Bootlegger Canyon, west of Moab, Utah, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52496565325.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52496565325_7accda1db8_m.jpg" alt="" /></a><br />Abronia elliptica (sand verbena) (north of Bootlegger Canyon, west of Moab, Utah, USA) 4 / James St. John</span>

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Bryozoan (reconstructed colony) (Cincinnatian Series, Upper Ordovician; vicinity of Cincinnati, Ohio, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/53729774830.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53729774830_ba87623b43_m.jpg" alt="" /></a><br />Bryozoan (reconstructed colony) (Cincinnatian Series, Upper Ordovician; vicinity of Cincinnati, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50746059351.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50746059351_657cae3a75_m.jpg" alt="" /></a><br />Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 4 / James St. John</span>

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Isotelus maximus fossil trilobite with healed bite mark (Flat Run Trilobite Lagerstatte, Arnheim Formation, Upper Ordovician; Flat Run Quarry, far-southwestern Highland County, southwestern Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15262685375.html" target="_blank"><img src="http://farm4.static.flickr.com/3876/15262685375_9e72852cbd_m.jpg" alt="" /></a><br />Isotelus maximus fossil trilobite with healed bite mark (Flat Run Trilobite Lagerstatte, Arnheim Formation, Upper Ordovician; Flat Run Quarry, far-southwestern Highland County, southwestern Ohio, USA) 2 / James St. John</span>

サイズ変更など

Geniculograptus pygmaeus fossil graptolites (Kope Formation, Upper Ordovician; Kenton County, Kentucky, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/17389529022.html" target="_blank"><img src="http://farm8.static.flickr.com/7794/17389529022_6dab41b57b_m.jpg" alt="" /></a><br />Geniculograptus pygmaeus fossil graptolites (Kope Formation, Upper Ordovician; Kenton County, Kentucky, USA) / James St. John</span>

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Quartz-permineralized fossil wood 32
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52635051096.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52635051096_e0c6492f00_m.jpg" alt="" /></a><br />Quartz-permineralized fossil wood 32 / James St. John</span>

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Porphyritic diabase (Cape Ann, Massachusetts, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51621107404.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51621107404_8cdd0ec5b0_m.jpg" alt="" /></a><br />Porphyritic diabase (Cape Ann, Massachusetts, USA) 5 / James St. John</span>

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Isotelus gigas fossil trilobite (Middle Ordovician; Walcott-Rust Quarry, New York State, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16763508314.html" target="_blank"><img src="http://farm8.static.flickr.com/7706/16763508314_3ea678386a_m.jpg" alt="" /></a><br />Isotelus gigas fossil trilobite (Middle Ordovician; Walcott-Rust Quarry, New York State, USA) / James St. John</span>

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20170624_1209
by MostlyDross

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35512087495.html" target="_blank"><img src="http://farm5.static.flickr.com/4238/35512087495_9b9353699a_m.jpg" alt="" /></a><br />20170624_1209 / MostlyDross</span>

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Crinoidal limestone (Kope Formation, Upper Ordovician; Cincinnati area, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35931248546.html" target="_blank"><img src="http://farm5.static.flickr.com/4327/35931248546_201c4e2d38_m.jpg" alt="" /></a><br />Crinoidal limestone (Kope Formation, Upper Ordovician; Cincinnati area, USA) 1 / James St. John</span>

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Pop-up anticline in limestone (Waynesville Formation, Upper Ordovician; Warren County, Ohio, USA) 8
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52373507364.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52373507364_b5b505b0f2_m.jpg" alt="" /></a><br />Pop-up anticline in limestone (Waynesville Formation, Upper Ordovician; Warren County, Ohio, USA) 8 / James St. John</span>

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Limestones (Chepultepec Formation, Lower Ordovician; Natural Bridge State Park, Virginia, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/27771648626.html" target="_blank"><img src="http://farm8.static.flickr.com/7375/27771648626_75e27b1cd9_m.jpg" alt="" /></a><br />Limestones (Chepultepec Formation, Lower Ordovician; Natural Bridge State Park, Virginia, USA) 3 / James St. John</span>

サイズ変更など

Folded calcareous shale (Sevier Formation, Middle Ordovician; Bays Mountain roadcut, Tennessee, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/36852183631.html" target="_blank"><img src="http://farm5.static.flickr.com/4384/36852183631_d6b2b78c1c_m.jpg" alt="" /></a><br />Folded calcareous shale (Sevier Formation, Middle Ordovician; Bays Mountain roadcut, Tennessee, USA) 1 / James St. John</span>

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Vermont White Marble (Shelburne Formation, Pennsylvanian metamorphism of Ordovician limestones; Danby, Vermont, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34003644575.html" target="_blank"><img src="http://farm3.static.flickr.com/2859/34003644575_c6157f0d5a_m.jpg" alt="" /></a><br />Vermont White Marble (Shelburne Formation, Pennsylvanian metamorphism of Ordovician limestones; Danby, Vermont, USA) 3 / James St. John</span>

サイズ変更など

Geniculograptus typicalis fossil graptolites (Kope Formation, Upper Ordovician; Kenton County, Kentucky, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16771115263.html" target="_blank"><img src="http://farm8.static.flickr.com/7776/16771115263_d6fe83323d_m.jpg" alt="" /></a><br />Geniculograptus typicalis fossil graptolites (Kope Formation, Upper Ordovician; Kenton County, Kentucky, USA) / James St. John</span>

サイズ変更など

Tetradium sp. (a.k.a. Prismostylus sp.) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34382987100.html" target="_blank"><img src="http://farm5.static.flickr.com/4177/34382987100_29bd0b5865_m.jpg" alt="" /></a><br />Tetradium sp. (a.k.a. Prismostylus sp.) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Crinoidal limestone (Kope Formation, Upper Ordovician; Cincinnati area, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35840005101.html" target="_blank"><img src="http://farm5.static.flickr.com/4309/35840005101_9a1e0d5deb_m.jpg" alt="" /></a><br />Crinoidal limestone (Kope Formation, Upper Ordovician; Cincinnati area, USA) 2 / James St. John</span>

サイズ変更など

DSC_3925
by Kyle Hartshorn

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/24272280283.html" target="_blank"><img src="http://farm2.static.flickr.com/1596/24272280283_7276b44796_m.jpg" alt="" /></a><br />DSC_3925 / Kyle Hartshorn</span>

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Didymograptus fossil graptolites in black shale (Ledbetter Shale, Ordovician; Oreille County, Washington State, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16769139434.html" target="_blank"><img src="http://farm9.static.flickr.com/8854/16769139434_8455fc91c3_m.jpg" alt="" /></a><br />Didymograptus fossil graptolites in black shale (Ledbetter Shale, Ordovician; Oreille County, Washington State, USA) / James St. John</span>

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Diorama of a Cincinnatian seafloor (Late Ordovician) - nautiloids, crinoids, algae 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/43799099560.html" target="_blank"><img src="http://farm2.static.flickr.com/1966/43799099560_13772fb3ec_m.jpg" alt="" /></a><br />Diorama of a Cincinnatian seafloor (Late Ordovician) - nautiloids, crinoids, algae 2 / James St. John</span>

サイズ変更など

Isotelus maximus (fossil trilobite) (Waynesville Formation, Upper Ordovician; Adams County, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/20908933100.html" target="_blank"><img src="http://farm6.static.flickr.com/5725/20908933100_81676ec56c_m.jpg" alt="" /></a><br />Isotelus maximus (fossil trilobite) (Waynesville Formation, Upper Ordovician; Adams County, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Champlain Black Marble (Crown Point Limestone, Middle Ordovician; Vermont, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49657327006.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49657327006_afa75d3e04_m.jpg" alt="" /></a><br />Champlain Black Marble (Crown Point Limestone, Middle Ordovician; Vermont, USA) 4 / James St. John</span>

サイズ変更など

Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 15
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49075328886.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49075328886_dc64ce3bb4_m.jpg" alt="" /></a><br />Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 15 / James St. John</span>

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Impact breccia (Middle Ordovician; Hummeln Impact Structure, Sweden) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50903891517.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50903891517_7ff00c3efd_m.jpg" alt="" /></a><br />Impact breccia (Middle Ordovician; Hummeln Impact Structure, Sweden) 4 / James St. John</span>

サイズ変更など

Labechia sp. (fossil stromatoporoid sponge) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34606181352.html" target="_blank"><img src="http://farm5.static.flickr.com/4227/34606181352_ed6d43905e_m.jpg" alt="" /></a><br />Labechia sp. (fossil stromatoporoid sponge) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Ordovician-Silurian unconformity section (Dunkinsville Southwest roadcut, Ohio, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52123019396.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52123019396_8df7dee9bb_m.jpg" alt="" /></a><br />Ordovician-Silurian unconformity section (Dunkinsville Southwest roadcut, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Allium cristophii (Persian onion) (Newark, Ohio, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52914280806.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52914280806_d46b09a40b_m.jpg" alt="" /></a><br />Allium cristophii (Persian onion) (Newark, Ohio, USA) 1 / James St. John</span>

サイズ変更など

Grewingkia canadensis (fossil rugose corals) (Upper Ordovician; Chasetown, Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34815984864.html" target="_blank"><img src="http://farm5.static.flickr.com/4288/34815984864_a83b62129a_m.jpg" alt="" /></a><br />Grewingkia canadensis (fossil rugose corals) (Upper Ordovician; Chasetown, Ohio, USA) / James St. John</span>

サイズ変更など

Fossil bivalve (Upper Ordovician; Monroe, Butler County, Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50018046587.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50018046587_a375b11bd0_m.jpg" alt="" /></a><br />Fossil bivalve (Upper Ordovician; Monroe, Butler County, Ohio, USA) / James St. John</span>

サイズ変更など

Diplocraterion trace fossil (Arnheim Formation, Upper Ordovician; Hamilton County, southwestern Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15545146752.html" target="_blank"><img src="http://farm4.static.flickr.com/3939/15545146752_32062c6afc_m.jpg" alt="" /></a><br />Diplocraterion trace fossil (Arnheim Formation, Upper Ordovician; Hamilton County, southwestern Ohio, USA) / James St. John</span>

サイズ変更など

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15239675716.html" target="_blank"><img src="http://farm6.static.flickr.com/5580/15239675716_ba5f19bd1b_m.jpg" alt="" /></a><br />Isotelus maximus fossil trilobite with healed bite mark (Flat Run Trilobite Lagerstatte, Arnheim Formation, Upper Ordovician; Flat Run Quarry, far-southwestern Highland County, southwestern Ohio, USA) 3 / James St. John</span>

サイズ変更など

Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 14
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49075540887.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49075540887_55bbb58d4b_m.jpg" alt="" /></a><br />Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 14 / James St. John</span>

サイズ変更など

Ectenocrinus simplex (fossil crinoid) (Kope Formation, Upper Ordovician; northern Kentucky, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34997941533.html" target="_blank"><img src="http://farm5.static.flickr.com/4240/34997941533_745a3e452d_m.jpg" alt="" /></a><br />Ectenocrinus simplex (fossil crinoid) (Kope Formation, Upper Ordovician; northern Kentucky, USA) / James St. John</span>

サイズ変更など

Rhododendron sp. (Newark, Ohio, USA) 23
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52913674189.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52913674189_4889b41c33_m.jpg" alt="" /></a><br />Rhododendron sp. (Newark, Ohio, USA) 23 / James St. John</span>

サイズ変更など

Cupulocrinus sp. (fossil crinoids) (Upper Ordovician; Brechin, Ontario, Canada) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35766897266.html" target="_blank"><img src="http://farm5.static.flickr.com/4215/35766897266_a3193c6b81_m.jpg" alt="" /></a><br />Cupulocrinus sp. (fossil crinoids) (Upper Ordovician; Brechin, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Millbrig Bentonite (Upper Ordovician, 454 Ma; Warren County core, Ohio, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32326361998.html" target="_blank"><img src="http://farm5.static.flickr.com/4866/32326361998_4622599863_m.jpg" alt="" /></a><br />Millbrig Bentonite (Upper Ordovician, 454 Ma; Warren County core, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Halysites gracilis (fossil coral colony) (Richmond Group, Upper Ordovician; Winnipeg, Manitoba, Canada)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49135403558.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49135403558_5eaeed7fc1_m.jpg" alt="" /></a><br />Halysites gracilis (fossil coral colony) (Richmond Group, Upper Ordovician; Winnipeg, Manitoba, Canada) / James St. John</span>

サイズ変更など

Kimberlite (modern fluvial clast) (creek at Chatham, Licking County, Ohio, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49718025063.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49718025063_7d3df0b748_m.jpg" alt="" /></a><br />Kimberlite (modern fluvial clast) (creek at Chatham, Licking County, Ohio, USA) 3 / James St. John</span>

サイズ変更など

Micritic limestone (Moccasin Formation, Middle Ordovician; Thorn Hill section, Grainger County, Tennessee, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49943472621.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49943472621_2b44a2f38e_m.jpg" alt="" /></a><br />Micritic limestone (Moccasin Formation, Middle Ordovician; Thorn Hill section, Grainger County, Tennessee, USA) / James St. John</span>

サイズ変更など

Low waterfalls
by Kyle Hartshorn

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14363619806.html" target="_blank"><img src="http://farm3.static.flickr.com/2915/14363619806_6b70dcdb06_m.jpg" alt="" /></a><br />Low waterfalls / Kyle Hartshorn</span>

サイズ変更など

Labechia sp. (fossil stromatoporoid sponge) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34728243866.html" target="_blank"><img src="http://farm5.static.flickr.com/4178/34728243866_b0303fca36_m.jpg" alt="" /></a><br />Labechia sp. (fossil stromatoporoid sponge) (Elkhorn Formation, Upper Ordovician; south of Dayton, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51188866556.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51188866556_b9265f75c6_m.jpg" alt="" /></a><br />Gutter cast in limestone (Upper Ordovician; Cincinnatian area, USA) 4 / James St. John</span>

サイズ変更など

Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48609472078.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48609472078_8aea83bd93_m.jpg" alt="" /></a><br />Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 5 / James St. John</span>

サイズ変更など

Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 8
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48609985902.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48609985902_f37b512f7d_m.jpg" alt="" /></a><br />Flexicalymene meeki (fossil trilobite) (Cincinnatian Series, Upper Ordovician; Cincinnati area, USA) 8 / James St. John</span>

サイズ変更など

Glyptocrinus decadactylus (fossil crinoid) (Fairview Formation, Upper Ordovician; Mason County, Kentucky, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35839022611.html" target="_blank"><img src="http://farm5.static.flickr.com/4299/35839022611_b4bcb19dd1_m.jpg" alt="" /></a><br />Glyptocrinus decadactylus (fossil crinoid) (Fairview Formation, Upper Ordovician; Mason County, Kentucky, USA) / James St. John</span>

サイズ変更など

Carneyella ulrichi fossil edrioasteroid (Bellevue Formation, Upper Ordovician; Jersey Ridge roadcut, northern Kentucky, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15300754625.html" target="_blank"><img src="http://farm4.static.flickr.com/3887/15300754625_af71e68431_m.jpg" alt="" /></a><br />Carneyella ulrichi fossil edrioasteroid (Bellevue Formation, Upper Ordovician; Jersey Ridge roadcut, northern Kentucky, USA) / James St. John</span>

サイズ変更など

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