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Columnar-jointed phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 17
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/49221217331.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49221217331_68e723bd9c_m.jpg" alt="" /></a><br />Columnar-jointed phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 17 / James St. John</span>

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Alluvial polymict conglomerate (Mount Rogers Formation, Neoproterozoic, 750-760 Ma; Fox Creek roadcut, west of Troutdale, Virginia, USA) 113
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/30412230181.html" target="_blank"><img src="http://farm6.static.flickr.com/5529/30412230181_d1bcf130e6_m.jpg" alt="" /></a><br />Alluvial polymict conglomerate (Mount Rogers Formation, Neoproterozoic, 750-760 Ma; Fox Creek roadcut, west of Troutdale, Virginia, USA) 113 / James St. John</span>

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Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 12
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/47841693732.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47841693732_6d93a5f24d_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 12 / James St. John</span>

サイズ変更など

Pliegue y meteorización diferencial
by Geologiavaldivia

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/8950631553.html" target="_blank"><img src="http://farm8.static.flickr.com/7365/8950631553_6295c34214_m.jpg" alt="" /></a><br />Pliegue y meteorización diferencial / Geologiavaldivia</span>

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Sulfidic argillite (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/47878101731.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47878101731_4df5984b7b_m.jpg" alt="" /></a><br />Sulfidic argillite (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 8 / James St. John</span>

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Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 24
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/40911662323.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40911662323_97d34fdd91_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 24 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, 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/49233878563.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49233878563_3e5c5346fa_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 13 / James St. John</span>

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Orinoco Granite (garnetiferous convoluted gneiss) 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/33170981694.html" target="_blank"><img src="http://farm3.static.flickr.com/2881/33170981694_d4cf705d98_m.jpg" alt="" /></a><br />Orinoco Granite (garnetiferous convoluted gneiss) 11 / James St. John</span>

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Sulfidic serpentintite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50859236423.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50859236423_5fa61d059d_m.jpg" alt="" /></a><br />Sulfidic serpentintite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 13 / James St. John</span>

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Ptygmatically folded amphibolite (country rock of King's Mt. Pegmatite; King's Mountain, North Carolina, 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/40428236750.html" target="_blank"><img src="http://farm1.static.flickr.com/823/40428236750_4b06ab91cf_m.jpg" alt="" /></a><br />Ptygmatically folded amphibolite (country rock of King's Mt. Pegmatite; King's Mountain, North Carolina, USA) / James St. John</span>

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Porphyritic diabase (Cape Ann, Massachusetts, 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/51619589092.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51619589092_abc6658141_m.jpg" alt="" /></a><br />Porphyritic diabase (Cape Ann, Massachusetts, USA) 4 / James St. John</span>

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Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill cores at the Potter Mine, east of Timmins, 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/40906253163.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40906253163_e043ebbdc3_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill cores at the Potter Mine, east of Timmins, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/47083500324.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47083500324_d80102c456_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 14 / James St. John</span>

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Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, 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/37527072576.html" target="_blank"><img src="http://farm5.static.flickr.com/4505/37527072576_684e9dbfd4_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 9 / James St. John</span>

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White Pearl Granite (La Cabrera Granite, Pennsylvanian to Early Permian, 288 to 310 Ma; near Bustarviejo, Castilla, Spain) 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/41759066952.html" target="_blank"><img src="http://farm1.static.flickr.com/953/41759066952_d698099279_m.jpg" alt="" /></a><br />White Pearl Granite (La Cabrera Granite, Pennsylvanian to Early Permian, 288 to 310 Ma; near Bustarviejo, Castilla, Spain) 5 / James St. John</span>

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Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, 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/21428095276.html" target="_blank"><img src="http://farm6.static.flickr.com/5677/21428095276_101c84f6fe_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 13 / James St. John</span>

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Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 29
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/21443177422.html" target="_blank"><img src="http://farm6.static.flickr.com/5695/21443177422_06631624a8_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 29 / James St. John</span>

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Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 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/47893748891.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47893748891_be69dc2a7f_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 14 / James St. John</span>

サイズ変更など

Aphanitic phonolite (Bluebird Dike, Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, 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/49223452132.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49223452132_f3f27dfa16_m.jpg" alt="" /></a><br />Aphanitic phonolite (Bluebird Dike, Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 13 / James St. John</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 28
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/21266314268.html" target="_blank"><img src="http://farm6.static.flickr.com/5634/21266314268_2156ec8136_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 28 / James St. John</span>

サイズ変更など

Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 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/47841679672.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47841679672_ea1c9360cf_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 13 / James St. John</span>

サイズ変更など

Spinifex metakomatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 62
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/47783045172.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47783045172_f7ffb51741_m.jpg" alt="" /></a><br />Spinifex metakomatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 62 / James St. John</span>

サイズ変更など

Sulfidic argillite (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/33998101728.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33998101728_bb0277824d_m.jpg" alt="" /></a><br />Sulfidic argillite (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 6 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 12
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/49233880268.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49233880268_e24d50be97_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 12 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 22
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/49235615661.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49235615661_2851d84d73_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 22 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 24
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/49235146603.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49235146603_8028d22687_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 24 / James St. John</span>

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Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, 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/39844297003.html" target="_blank"><img src="http://farm5.static.flickr.com/4863/39844297003_b44b2a67a2_m.jpg" alt="" /></a><br />Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 13 / James St. John</span>

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Narrows Basalt (Lower Pleistocene, 1.5-1.6 Ma) (Narrows of the Yellowstone River, northeastern Yellowstone National Park, Wyoming, 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/19510598353.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/19510598353_d6db1c7c72_m.jpg" alt="" /></a><br />Narrows Basalt (Lower Pleistocene, 1.5-1.6 Ma) (Narrows of the Yellowstone River, northeastern Yellowstone National Park, Wyoming, USA) 1 / James St. John</span>

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Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 10
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/36944645323.html" target="_blank"><img src="http://farm5.static.flickr.com/4461/36944645323_738d1f5dac_m.jpg" alt="" /></a><br />Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 10 / James St. John</span>

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Mineralized-altered phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, 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/49229333577.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49229333577_2fe7707065_m.jpg" alt="" /></a><br />Mineralized-altered phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 6 / James St. John</span>

サイズ変更など

Porphyritic granite (Giants Range Batholith, Neoarchean, 2.67-2.68 Ga; Rt. 1 roadcut north of the South Kawishiwi River, Minnesota, 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/21255412429.html" target="_blank"><img src="http://farm6.static.flickr.com/5728/21255412429_21f0288af7_m.jpg" alt="" /></a><br />Porphyritic granite (Giants Range Batholith, Neoarchean, 2.67-2.68 Ga; Rt. 1 roadcut north of the South Kawishiwi River, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, 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/46977576475.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46977576475_4512379051_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill cores at the Potter Mine, east of Timmins, Ontario, Canada) 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/47820554982.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47820554982_569f983254_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill cores at the Potter Mine, east of Timmins, Ontario, Canada) 13 / James St. John</span>

サイズ変更など

Quenched blobs in pinkish-reddish porphyritic dacite (Upper Pleistocene, 27 ka; Devastated Area, Lassen Volcano National Park, California, 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/37306407440.html" target="_blank"><img src="http://farm5.static.flickr.com/4476/37306407440_dffd3a3842_m.jpg" alt="" /></a><br />Quenched blobs in pinkish-reddish porphyritic dacite (Upper Pleistocene, 27 ka; Devastated Area, Lassen Volcano National Park, California, USA) 3 / James St. John</span>

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Sulfidic basaltic lapillistone (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/40917002083.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40917002083_3c72cbe4fe_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 4 / James St. John</span>

サイズ変更など

Vesicular olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, 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/22948499079.html" target="_blank"><img src="http://farm1.static.flickr.com/600/22948499079_3e32cb4a5d_m.jpg" alt="" /></a><br />Vesicular olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, USA) 3 / James St. John</span>

サイズ変更など

Obsidian 18
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/49057143437.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49057143437_4cd57eac5d_m.jpg" alt="" /></a><br />Obsidian 18 / James St. John</span>

サイズ変更など

Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 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/40927328663.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40927328663_76c6ab526a_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 15 / James St. John</span>

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Platinum-palladium ore (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/49952576051.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49952576051_d7d9e52ba5_m.jpg" alt="" /></a><br />Platinum-palladium ore (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 1 / James St. John</span>

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Dacite (upper Holocene, 14 May 1915; Hot Rock, Devastated Area, Lassen Volcano National Park, California, 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/23723893828.html" target="_blank"><img src="http://farm5.static.flickr.com/4454/23723893828_2cd7c0f502_m.jpg" alt="" /></a><br />Dacite (upper Holocene, 14 May 1915; Hot Rock, Devastated Area, Lassen Volcano National Park, California, USA) / James St. John</span>

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Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 61
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/36866437004.html" target="_blank"><img src="http://farm5.static.flickr.com/4503/36866437004_3f34127113_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 61 / James St. John</span>

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Pisolitic bauxite 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/8284195415.html" target="_blank"><img src="http://farm9.static.flickr.com/8064/8284195415_a1ca09d8ba_m.jpg" alt="" /></a><br />Pisolitic bauxite 1 / James St. John</span>

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Scoria (Middle Pleistocene, 670 ka; Black Rock Volcano, Millard County, 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/31596048441.html" target="_blank"><img src="http://farm1.static.flickr.com/462/31596048441_a996197711_m.jpg" alt="" /></a><br />Scoria (Middle Pleistocene, 670 ka; Black Rock Volcano, Millard County, Utah, USA) 2 / James St. John</span>

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Massive Pt-Pd-rich sulfide (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50865688022.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50865688022_76cfc0d2f6_m.jpg" alt="" /></a><br />Massive Pt-Pd-rich sulfide (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 4 / James St. John</span>

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Sulfidic argillite & polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/33998098228.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33998098228_5b9d5145e0_m.jpg" alt="" /></a><br />Sulfidic argillite & polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 3 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 26
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/49235610516.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49235610516_520974bc7f_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 26 / James St. John</span>

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Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, 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/21462665551.html" target="_blank"><img src="http://farm1.static.flickr.com/622/21462665551_62313a608b_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 30 / James St. John</span>

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Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 63
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/36866427694.html" target="_blank"><img src="http://farm5.static.flickr.com/4506/36866427694_7d84c5e5d0_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 63 / James St. John</span>

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Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 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/47104410164.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47104410164_38b13b11c0_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 16 / James St. John</span>

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Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 35
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/47088793834.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47088793834_19e40c2d4b_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 35 / James St. John</span>

サイズ変更など

Orinoco Granite (garnetiferous gneiss)
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/33170901794.html" target="_blank"><img src="http://farm3.static.flickr.com/2827/33170901794_94e9732ec6_m.jpg" alt="" /></a><br />Orinoco Granite (garnetiferous gneiss) / 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) 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/48296331397.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48296331397_4010abc20c_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 9 / James St. John</span>

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Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, 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/37575339202.html" target="_blank"><img src="http://farm5.static.flickr.com/4501/37575339202_d07c869211_m.jpg" alt="" /></a><br />Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 5 / James St. John</span>

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Agglutinated volcanic bomb in basaltic lapillistone (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; just east of the Potter Mine, east of Timmins, Ontario, Canada) 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/47862973131.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47862973131_3c69723fa1_m.jpg" alt="" /></a><br />Agglutinated volcanic bomb in basaltic lapillistone (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; just east of the Potter Mine, east of Timmins, Ontario, Canada) 9 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 18
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/49235847232.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49235847232_9b04586e1e_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 18 / James St. John</span>

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Aphanitic phonolite (Bluebird Dike, Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 12
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/49223229946.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49223229946_9d8c4b674c_m.jpg" alt="" /></a><br />Aphanitic phonolite (Bluebird Dike, Cripple Creek Diatreme, Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 12 / James St. John</span>

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Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 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/46977676415.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46977676415_065cc5c0f3_m.jpg" alt="" /></a><br />Peridotite & serpentinite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 11 / James St. John</span>

サイズ変更など

Sulfidic serpentintite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50839332252.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50839332252_48dbf4536d_m.jpg" alt="" /></a><br />Sulfidic serpentintite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 11 / James St. John</span>

サイズ変更など

Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 52
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/36866113674.html" target="_blank"><img src="http://farm5.static.flickr.com/4467/36866113674_034a8c98dd_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 52 / James St. John</span>

サイズ変更など

Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 21
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/49235616851.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49235616851_b3986c2ddf_m.jpg" alt="" /></a><br />Cripple Creek Diatreme (Early Oligocene, 32 Ma; Cresson Pit, Cripple Creek Mining District, Colorado, USA) 21 / James St. John</span>

サイズ変更など

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