metamorphism

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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>

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

Phyllite (French Slate, Paleoproterozoic; Snowy Range Road roadcut, Medicine Bow Mountains, 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/44711620875.html" target="_blank"><img src="http://farm2.static.flickr.com/1933/44711620875_5e3b0d6c9c_m.jpg" alt="" /></a><br />Phyllite (French Slate, Paleoproterozoic; Snowy Range Road roadcut, Medicine Bow Mountains, Wyoming, USA) 3 / James St. John</span>

サイズ変更など

Earthy hematite (Black Hills, South Dakota, 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/52674052900.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52674052900_6329f4819b_m.jpg" alt="" /></a><br />Earthy hematite (Black Hills, South Dakota, USA) 8 / James St. John</span>

サイズ変更など

Narrows of the New River (Virginia, 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/8290955697.html" target="_blank"><img src="http://farm9.static.flickr.com/8223/8290955697_8337d6d8f7_m.jpg" alt="" /></a><br />Narrows of the New River (Virginia, USA) / 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

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

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>

サイズ変更など

Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, 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/23956515651.html" target="_blank"><img src="http://farm6.static.flickr.com/5631/23956515651_ab593e7617_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 5 / James St. John</span>

サイズ変更など

"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 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/29829393710.html" target="_blank"><img src="http://farm9.static.flickr.com/8276/29829393710_7230df582a_m.jpg" alt="" /></a><br />"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 3 / 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

Overturned cross-bedding in quartzite (Baraboo Quartzite, upper Paleoproterozoic, ~1.7 Ga; Tumbled Rocks Trail, Devil's Lake State Park, Wisconsin, 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/18198401083.html" target="_blank"><img src="http://farm1.static.flickr.com/528/18198401083_ec59361077_m.jpg" alt="" /></a><br />Overturned cross-bedding in quartzite (Baraboo Quartzite, upper Paleoproterozoic, ~1.7 Ga; Tumbled Rocks Trail, Devil's Lake State Park, Wisconsin, USA) 1 / James St. John</span>

サイズ変更など

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

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>

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) 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>

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

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

Lapis lazuli (Rio Tascadero Limestone, Lower Cretaceous; Flor de los Andes Mine, Andes Mountains, Chile)
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/49166048431.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49166048431_cd562c36a9_m.jpg" alt="" /></a><br />Lapis lazuli (Rio Tascadero Limestone, Lower Cretaceous; Flor de los Andes Mine, Andes Mountains, Chile) / 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) 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

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

Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, 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/23743354120.html" target="_blank"><img src="http://farm2.static.flickr.com/1599/23743354120_3099ba3b45_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 10 / James St. John</span>

サイズ変更など

Meta-eclogite (Arguvan District, Malatya Province, Turkey) 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/52735044271.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52735044271_09c894ec5e_m.jpg" alt="" /></a><br />Meta-eclogite (Arguvan District, Malatya Province, Turkey) 1 / James St. John</span>

サイズ変更など

Ripples marks (Sioux Quartzite, Paleoproterozoic, 1.65-1.70 Ga; Falls Park, Sioux Falls, South Dakota, 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/8286900977.html" target="_blank"><img src="http://farm9.static.flickr.com/8224/8286900977_b70c6c2546_m.jpg" alt="" /></a><br />Ripples marks (Sioux Quartzite, Paleoproterozoic, 1.65-1.70 Ga; Falls Park, Sioux Falls, South Dakota, USA) 1 / 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) 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/21454296555.html" target="_blank"><img src="http://farm1.static.flickr.com/697/21454296555_cd8fd08606_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 15 / James St. John</span>

サイズ変更など

Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, 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/23412250473.html" target="_blank"><img src="http://farm6.static.flickr.com/5696/23412250473_6aaa1f8cb6_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 9 / James St. John</span>

サイズ変更など

Stichtitic serpentinite (Dundas Ultramafic Complex, Cambrian; Stichtite Hill, western Tasmania) 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/49146738716.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49146738716_5e1110277f_m.jpg" alt="" /></a><br />Stichtitic serpentinite (Dundas Ultramafic Complex, Cambrian; Stichtite Hill, western Tasmania) 3 / James St. John</span>

サイズ変更など

Chromitite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, Montana, 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/50433665066.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50433665066_41334359c2_m.jpg" alt="" /></a><br />Chromitite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, Montana, USA) 3 / James St. John</span>

サイズ変更など

Rubies encased in K-feldspar in fuchsite-rich matrix (Precambrian; eastern Brazil) 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/49523923483.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49523923483_1b2507849c_m.jpg" alt="" /></a><br />Rubies encased in K-feldspar in fuchsite-rich matrix (Precambrian; eastern Brazil) 3 / James St. John</span>

サイズ変更など

Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, 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/24012839516.html" target="_blank"><img src="http://farm2.static.flickr.com/1577/24012839516_691a7c4c0b_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 21 / James St. John</span>

サイズ変更など

Kyanite schist 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/45310725765.html" target="_blank"><img src="http://farm5.static.flickr.com/4819/45310725765_735ba3fa6d_m.jpg" alt="" /></a><br />Kyanite schist 2 / 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) 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/21454397395.html" target="_blank"><img src="http://farm1.static.flickr.com/725/21454397395_e1eae189e8_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 5 / 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) 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/47088626604.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47088626604_87dbaab424_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) 23 / James St. John</span>

サイズ変更など

Kyanite schist 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/31284731697.html" target="_blank"><img src="http://farm5.static.flickr.com/4814/31284731697_c0ba780fd0_m.jpg" alt="" /></a><br />Kyanite schist 1 / 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) 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/21462644081.html" target="_blank"><img src="http://farm6.static.flickr.com/5804/21462644081_178bcbb942_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 8 / 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) 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/46977691035.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46977691035_320c7bcea4_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) 10 / 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>

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) 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/48296338597.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48296338597_b7417fa236_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 8 / James St. John</span>

サイズ変更など

Kyanite schist 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/31284741327.html" target="_blank"><img src="http://farm5.static.flickr.com/4814/31284741327_9ff7eb1bc4_m.jpg" alt="" /></a><br />Kyanite schist 4 / James St. John</span>

サイズ変更など

Asymmetrical ripple marks in quartzite (Baraboo Quartzite, upper Paleoproterozoic, 1.7 Ga; southern shore of Devil's Lake, Devil's Lake State Park, Wisconsin, 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/18636564039.html" target="_blank"><img src="http://farm4.static.flickr.com/3769/18636564039_bd9e9a7e61_m.jpg" alt="" /></a><br />Asymmetrical ripple marks in quartzite (Baraboo Quartzite, upper Paleoproterozoic, 1.7 Ga; southern shore of Devil's Lake, Devil's Lake State Park, Wisconsin, USA) 8 / 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) 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/40927190283.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40927190283_0d8f5c6ab0_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) 1 / 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) 25
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/20831500314.html" target="_blank"><img src="http://farm1.static.flickr.com/678/20831500314_8e195a3591_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 25 / James St. John</span>

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Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 7
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/23956502751.html" target="_blank"><img src="http://farm6.static.flickr.com/5659/23956502751_c2df41a3bc_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 7 / James St. John</span>

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Sioux Quartzite (Paleoproterozoic, 1.65-1.70 Ga; Falls Park, Sioux Falls, South Dakota, 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/8287958966.html" target="_blank"><img src="http://farm9.static.flickr.com/8065/8287958966_299d3da175_m.jpg" alt="" /></a><br />Sioux Quartzite (Paleoproterozoic, 1.65-1.70 Ga; Falls Park, Sioux Falls, South Dakota, USA) 5 / James St. John</span>

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Hematite-rich iron ore (Precambrian; Pioneer Mine, Ely, Minnesota, 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/50542570122.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50542570122_410070396b_m.jpg" alt="" /></a><br />Hematite-rich iron ore (Precambrian; Pioneer Mine, Ely, Minnesota, USA) 1 / 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 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/46959105055.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46959105055_b792a5a400_m.jpg" alt="" /></a><br />Sulfidic argillite & 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>

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Rubies encased in K-feldspar in fuchsite-rich matrix (Precambrian; eastern Brazil) 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/49524438926.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49524438926_1f4754c7f1_m.jpg" alt="" /></a><br />Rubies encased in K-feldspar in fuchsite-rich matrix (Precambrian; eastern Brazil) 2 / James St. John</span>

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Novaculite (metachert) (Arkansas Novaculite, Devonian to Mississippian; Arkansas, 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/50967596643.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50967596643_4a776dfb74_m.jpg" alt="" /></a><br />Novaculite (metachert) (Arkansas Novaculite, Devonian to Mississippian; Arkansas, USA) 6 / James St. John</span>

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Quartzite & slate (Baraboo Quartzite, upper Paleoproterozoic, ~1.7 Ga; Van Hise Rock, just north of Rock Springs, Wisconsin, 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/18767774085.html" target="_blank"><img src="http://farm9.static.flickr.com/8896/18767774085_bd8b8b8209_m.jpg" alt="" /></a><br />Quartzite & slate (Baraboo Quartzite, upper Paleoproterozoic, ~1.7 Ga; Van Hise Rock, just north of Rock Springs, Wisconsin, USA) 4 / James St. John</span>

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Otter Creek & gravel bar of Baraboo Quartzite clasts (Baxter Hollow, South Range of the Baraboo Ranges, Wisconsin, USA) 7
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/18658264250.html" target="_blank"><img src="http://farm4.static.flickr.com/3918/18658264250_43ccedbaf8_m.jpg" alt="" /></a><br />Otter Creek & gravel bar of Baraboo Quartzite clasts (Baxter Hollow, South Range of the Baraboo Ranges, Wisconsin, USA) 7 / James St. John</span>

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Hematite rock (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, 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/34626096906.html" target="_blank"><img src="http://farm5.static.flickr.com/4165/34626096906_57e3347a0d_m.jpg" alt="" /></a><br />Hematite rock (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 3 / 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) 7
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/21266539838.html" target="_blank"><img src="http://farm1.static.flickr.com/748/21266539838_ce00df534b_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 7 / James St. John</span>

サイズ変更など

Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, 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/24012861306.html" target="_blank"><img src="http://farm2.static.flickr.com/1581/24012861306_44e02d1836_m.jpg" alt="" /></a><br />Muscovitic-serpentinic marble (Precambrian; Black Hills Porcelain Clay and Marble Mining Company Quarry, Custer State Park, Black Hills, South Dakota, USA) 18 / 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) 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/47875368741.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47875368741_b9cda919d1_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) 5 / 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) 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/33995473768.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33995473768_ffd4a8d4ed_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) 5 / 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; 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/47820008922.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47820008922_5e4068813d_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; 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) 33
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/47826066132.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47826066132_504d3686a5_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) 33 / James St. John</span>

サイズ変更など

Marble (Murphy Marble, Ordovician; quarry near Tate, Georgia, 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/53312940315.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53312940315_fee8e83e6a_m.jpg" alt="" /></a><br />Marble (Murphy Marble, Ordovician; quarry near Tate, Georgia, USA) 2 / James St. John</span>

サイズ変更など

Garnetiferous hornblende schist (Hanover, Grafton County, New Hampshire, 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/41174163384.html" target="_blank"><img src="http://farm1.static.flickr.com/948/41174163384_0956d18894_m.jpg" alt="" /></a><br />Garnetiferous hornblende schist (Hanover, Grafton County, New Hampshire, USA) / James St. John</span>

サイズ変更など

Migmatite (Precambrian; near Morrison, Colorado, 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/52827892923.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52827892923_a089c1992b_m.jpg" alt="" /></a><br />Migmatite (Precambrian; near Morrison, Colorado, USA) 2 / James St. John</span>

サイズ変更など

Peacock coal 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/50656176747.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50656176747_c9a24189cb_m.jpg" alt="" /></a><br />Peacock coal 10 / James St. John</span>

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