nodule

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Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 11
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/39603301272.html" target="_blank"><img src="http://farm5.static.flickr.com/4751/39603301272_fded03a353_m.jpg" alt="" /></a><br />Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 11 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western 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/30854148135.html" target="_blank"><img src="http://farm6.static.flickr.com/5765/30854148135_95ebc2c841_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 23 / James St. John</span>

サイズ変更など

Flint with weathering spherulites & rottenstone rind (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/25761653788.html" target="_blank"><img src="http://farm5.static.flickr.com/4699/25761653788_c53561d035_m.jpg" alt="" /></a><br />Flint with weathering spherulites & rottenstone rind (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 3 / James St. John</span>

サイズ変更など

Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 68
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/48304226701.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48304226701_6bc92e9f4d_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 68 / James St. John</span>

サイズ変更など

Metals from the depths of the sea 🌊
by jurvetson

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/53645901758.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53645901758_e2a1d6b1ea_m.jpg" alt="" /></a><br />Metals from the depths of the sea  🌊 / jurvetson</span>

サイズ変更など

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, 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/38924731684.html" target="_blank"><img src="http://farm5.static.flickr.com/4719/38924731684_7684eee307_m.jpg" alt="" /></a><br />Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 13 / James St. John</span>

サイズ変更など

Chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 11
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/45839062995.html" target="_blank"><img src="http://farm8.static.flickr.com/7806/45839062995_f33882bb74_m.jpg" alt="" /></a><br />Chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 11 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 118
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/38736414395.html" target="_blank"><img src="http://farm5.static.flickr.com/4752/38736414395_654c4f27d6_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 118 / James St. John</span>

サイズ変更など

Gastropod internal mold (Columbus Limestone, Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, 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/48620314652.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48620314652_ee5bcc9f51_m.jpg" alt="" /></a><br />Gastropod internal mold (Columbus Limestone, Middle Devonian; abandoned quarry, Kelleys Island, Lake Erie, Ohio, USA) 6 / James St. John</span>

サイズ変更など

Flint meganodule (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/51582445939.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51582445939_1537dc585f_m.jpg" alt="" /></a><br />Flint meganodule (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 8 / James St. John</span>

サイズ変更など

Wye, Ss Gregory & Martin church
by Jules & Jenny

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/49388944398.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49388944398_f49200be4a_m.jpg" alt="" /></a><br />Wye, Ss Gregory & Martin church / Jules & Jenny</span>

サイズ変更など

Chalcedony (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/32391521832.html" target="_blank"><img src="http://farm1.static.flickr.com/696/32391521832_dd6b5e59b9_m.jpg" alt="" /></a><br />Chalcedony (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 112
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/38736511835.html" target="_blank"><img src="http://farm5.static.flickr.com/4629/38736511835_18eca563cb_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 112 / James St. John</span>

サイズ変更など

Flint (probably the Obryan Chert, Middle Pennsylvanian; Vinton County, Ohio, USA) 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/54350985694.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54350985694_52ed93c2ea_m.jpg" alt="" /></a><br />Flint (probably the Obryan Chert, Middle Pennsylvanian; Vinton County, Ohio, USA) 32 / James St. John</span>

サイズ変更など

Polished flint spearpoint (Vanport Flint, Middle Pennsylvanian; Roy Miller Flint Quarries, Flint Ridge, 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/51427714112.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51427714112_68c9fde1d4_m.jpg" alt="" /></a><br />Polished flint spearpoint (Vanport Flint, Middle Pennsylvanian; Roy Miller Flint Quarries, Flint Ridge, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Normal fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern 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/25791436366.html" target="_blank"><img src="http://farm2.static.flickr.com/1482/25791436366_aeddc803cd_m.jpg" alt="" /></a><br />Normal fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 3 / James St. John</span>

サイズ変更など

Fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, 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/25696402052.html" target="_blank"><img src="http://farm2.static.flickr.com/1706/25696402052_e5b6f9692f_m.jpg" alt="" /></a><br />Fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 5 / James St. John</span>

サイズ変更など

Faulted geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico)
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/31911141814.html" target="_blank"><img src="http://farm1.static.flickr.com/663/31911141814_804121c84a_m.jpg" alt="" /></a><br />Faulted geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico) / James St. John</span>

サイズ変更など

Black precious opal (Tertiary; Wollo Province, Ethiopia) 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/48163622072.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48163622072_1f2de1d609_m.jpg" alt="" /></a><br />Black precious opal (Tertiary; Wollo Province, Ethiopia) 2 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, 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/51781694453.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51781694453_35e9df95d3_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Flint breccia-floored cavity in pinstriple flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/28004696498.html" target="_blank"><img src="http://farm1.static.flickr.com/832/28004696498_77aa86079f_m.jpg" alt="" /></a><br />Flint breccia-floored cavity in pinstriple flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Flint-knapped arrowhead (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/40460824105.html" target="_blank"><img src="http://farm1.static.flickr.com/887/40460824105_4c06b6efda_m.jpg" alt="" /></a><br />Flint-knapped arrowhead (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 1 / James St. John</span>

サイズ変更など

Berry Run with Vanport Flint gravel (Flint Ridge, Ohio, 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/23297671101.html" target="_blank"><img src="http://farm6.static.flickr.com/5828/23297671101_c48c269b8f_m.jpg" alt="" /></a><br />Berry Run with Vanport Flint gravel (Flint Ridge, Ohio, USA) 6 / James St. John</span>

サイズ変更など

Delaware Limestone over Columbus Limestone (Middle Devonian; Indian Village Canyon, Columbus, Ohio, 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/51789115158.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51789115158_a0c8b19bb6_m.jpg" alt="" /></a><br />Delaware Limestone over Columbus Limestone (Middle Devonian; Indian Village Canyon, Columbus, Ohio, USA) 5 / James St. John</span>

サイズ変更など

Gray chert (Knox 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/51159131455.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51159131455_21d61d11d9_m.jpg" alt="" /></a><br />Gray chert (Knox County, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Iron oxide-stained quartz nodule (Indiana, 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/53345218167.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53345218167_068338e5ea_m.jpg" alt="" /></a><br />Iron oxide-stained quartz nodule (Indiana, USA) 3 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 20
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/30553186190.html" target="_blank"><img src="http://farm6.static.flickr.com/5551/30553186190_6047eb3192_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 20 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 250
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/51425525493.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51425525493_9a23fa21f0_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 250 / James St. John</span>

サイズ変更など

Nelsonite (Laramie Anorthosite Complex, Mesoproterozoic, 1.43 Ga; Sybille Pit, Laramie Range, Wyoming, 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/50500375408.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50500375408_e2db2df910_m.jpg" alt="" /></a><br />Nelsonite (Laramie Anorthosite Complex, Mesoproterozoic, 1.43 Ga; Sybille Pit, Laramie Range, Wyoming, USA) 3 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, 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/30854196445.html" target="_blank"><img src="http://farm6.static.flickr.com/5550/30854196445_0267222fa1_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 15 / James St. John</span>

サイズ変更など

Fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, 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/25817346105.html" target="_blank"><img src="http://farm2.static.flickr.com/1613/25817346105_b8969933d6_m.jpg" alt="" /></a><br />Fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 6 / James St. John</span>

サイズ変更など

Maury Shale (Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 27
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/31682830987.html" target="_blank"><img src="http://farm5.static.flickr.com/4895/31682830987_d414bb6155_m.jpg" alt="" /></a><br />Maury Shale (Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 27 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 178
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/49945696091.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49945696091_e7ac1de292_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 178 / James St. John</span>

サイズ変更など

Flint-knapped arrowhead (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 16
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/51443007616.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51443007616_9234e17ab4_m.jpg" alt="" /></a><br />Flint-knapped arrowhead (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 16 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 16
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/30737790032.html" target="_blank"><img src="http://farm6.static.flickr.com/5547/30737790032_f1513d7bcc_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 16 / James St. John</span>

サイズ変更など

Travertine soda straw stalactites & draperies in dolostone network cave (Crystal Cave, near Spring Valley, Wisconsin, 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/18963305511.html" target="_blank"><img src="http://farm1.static.flickr.com/470/18963305511_b89807fd47_m.jpg" alt="" /></a><br />Travertine soda straw stalactites & draperies in dolostone network cave (Crystal Cave, near Spring Valley, Wisconsin, USA) / James St. John</span>

サイズ変更など

Nelsonite (Laramie Anorthosite Complex, Mesoproterozoic, 1.43 Ga; Sybille Pit, Laramie Range, Wyoming, 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/50501244427.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50501244427_e761c7876a_m.jpg" alt="" /></a><br />Nelsonite (Laramie Anorthosite Complex, Mesoproterozoic, 1.43 Ga; Sybille Pit, Laramie Range, Wyoming, USA) 5 / James St. John</span>

サイズ変更など

Fossil brachiopod in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, 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/51782227524.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51782227524_7b1fb9f364_m.jpg" alt="" /></a><br />Fossil brachiopod in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Boyle Formation (Middle Devonian; Emmanuel Baptist Church roadcut, Estill County, Kentucky, 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/52908881792.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52908881792_160e5bdf38_m.jpg" alt="" /></a><br />Boyle Formation (Middle Devonian; Emmanuel Baptist Church roadcut, Estill County, Kentucky, USA) 3 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 71
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/33299324341.html" target="_blank"><img src="http://farm1.static.flickr.com/660/33299324341_c627860877_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 71 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 264
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/51582680330.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51582680330_7a232b7e65_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 264 / James St. John</span>

サイズ変更など

Thermal image of Big Anemone Geyser eruption (10:04 AM, 11 June 2016) 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/28453458541.html" target="_blank"><img src="http://farm9.static.flickr.com/8599/28453458541_7e691ff659_m.jpg" alt="" /></a><br />Thermal image of Big Anemone Geyser eruption (10:04 AM, 11 June 2016) 1 / James St. John</span>

サイズ変更など

Black Pool 11
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/8270847898.html" target="_blank"><img src="http://farm9.static.flickr.com/8066/8270847898_f663124fc6_m.jpg" alt="" /></a><br />Black Pool 11 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 16
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/33029637980.html" target="_blank"><img src="http://farm1.static.flickr.com/768/33029637980_19d39410f2_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 16 / James St. John</span>

サイズ変更など

Fossiliferous limestone (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 20
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/27307420107.html" target="_blank"><img src="http://farm1.static.flickr.com/981/27307420107_04220722f0_m.jpg" alt="" /></a><br />Fossiliferous limestone (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 20 / James St. John</span>

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Phosphatic nodule in the New Providence Shale (Borden Formation, Lower Mississippian; MacDonald Knob Outcrop, Bullitt County, Kentucky, 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/45914586791.html" target="_blank"><img src="http://farm5.static.flickr.com/4818/45914586791_26797740a3_m.jpg" alt="" /></a><br />Phosphatic nodule in the New Providence Shale (Borden Formation, Lower Mississippian; MacDonald Knob Outcrop, Bullitt County, Kentucky, USA) 2 / James St. John</span>

サイズ変更など

Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 30
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/30817533376.html" target="_blank"><img src="http://farm6.static.flickr.com/5335/30817533376_1380545945_m.jpg" alt="" /></a><br />Chert nodule in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 30 / James St. John</span>

サイズ変更など

Silicified rugose coral (Columbus Limestone, Middle Devonian; Mt. Tabor, 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/52273684896.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52273684896_759675268a_m.jpg" alt="" /></a><br />Silicified rugose coral (Columbus Limestone, Middle Devonian; Mt. Tabor, Ohio, USA) / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Flint Ridge, Ohio, USA) 352
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/54501701423.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54501701423_527bfd9a02_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Flint Ridge, Ohio, USA) 352 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 261
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/51582680820.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51582680820_189b5834ef_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 261 / James St. John</span>

サイズ変更など

Chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 9
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/32878788508.html" target="_blank"><img src="http://farm5.static.flickr.com/4897/32878788508_faffc1010a_m.jpg" alt="" /></a><br />Chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 9 / James St. John</span>

サイズ変更など

Iron oxide-stained quartz nodule (Indiana, 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/53346546760.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53346546760_f828ffee79_m.jpg" alt="" /></a><br />Iron oxide-stained quartz nodule (Indiana, USA) 8 / James St. John</span>

サイズ変更など

Polished flint spearpoint (Vanport Flint, Middle Pennsylvanian; Roy Miller Flint Quarries, Flint Ridge, 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/51429441340.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51429441340_7ba057ce21_m.jpg" alt="" /></a><br />Polished flint spearpoint (Vanport Flint, Middle Pennsylvanian; Roy Miller Flint Quarries, Flint Ridge, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Partially silicified Hexagonaria (fossil coral) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, 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/45582209305.html" target="_blank"><img src="http://farm5.static.flickr.com/4861/45582209305_1c1aaa2170_m.jpg" alt="" /></a><br />Partially silicified Hexagonaria (fossil coral) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 5 / James St. John</span>

サイズ変更など

Small waterfall (Hawkins Pass, Mammoth Cave, Kentucky, 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/37967446732.html" target="_blank"><img src="http://farm5.static.flickr.com/4504/37967446732_5ff6027695_m.jpg" alt="" /></a><br />Small waterfall (Hawkins Pass, Mammoth Cave, Kentucky, USA) 2 / James St. John</span>

サイズ変更など

Chert nodules in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 31
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/30854100885.html" target="_blank"><img src="http://farm6.static.flickr.com/5331/30854100885_8181783b97_m.jpg" alt="" /></a><br />Chert nodules in limestone (Columbus Limestone, Middle Devonian; Ohio Caverns, western Ohio, USA) 31 / James St. John</span>

サイズ変更など

Manganese oxide dendrites on flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/33047769481.html" target="_blank"><img src="http://farm1.static.flickr.com/758/33047769481_62e30377a2_m.jpg" alt="" /></a><br />Manganese oxide dendrites on flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 262
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/51580948372.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51580948372_e51f11214d_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 262 / James St. John</span>

サイズ変更など

Quartz lining flint breccia-floored cavity in pinstriple flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, 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/40066479780.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40066479780_0a57ea5155_m.jpg" alt="" /></a><br />Quartz lining flint breccia-floored cavity in pinstriple flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 1 / James St. John</span>

サイズ変更など

Normal fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, 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/25722381691.html" target="_blank"><img src="http://farm2.static.flickr.com/1512/25722381691_6dbc04e539_m.jpg" alt="" /></a><br />Normal fault in the Lowellville Shale (Pottsville Group, Lower Pennsylvanian; Beach City Dam outcrop, northeastern Ohio, USA) 5 / James St. John</span>

サイズ変更など

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