archean

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Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, 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/21266342118.html" target="_blank"><img src="http://farm6.static.flickr.com/5813/21266342118_4654df3ea7_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 26 / James St. John</span>

サイズ変更など

Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, 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/22264568259.html" target="_blank"><img src="http://farm1.static.flickr.com/651/22264568259_1a5806c95a_m.jpg" alt="" /></a><br />Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Isoclinal fold in gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, 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/44609779485.html" target="_blank"><img src="http://farm2.static.flickr.com/1969/44609779485_359ba3956a_m.jpg" alt="" /></a><br />Isoclinal fold in gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 2 / James St. John</span>

サイズ変更など

Greenstone (metamorphosed pillow basalts) (Mona Formation, Neoarchean, 2.7 Ga; Rt. 41/Rt. 28 roadcut west of Marquette, Michigan, 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/8282351580.html" target="_blank"><img src="http://farm9.static.flickr.com/8348/8282351580_35aeb440b0_m.jpg" alt="" /></a><br />Greenstone (metamorphosed pillow basalts) (Mona Formation, Neoarchean, 2.7 Ga; Rt. 41/Rt. 28 roadcut west of Marquette, Michigan, USA) 3 / James St. John</span>

サイズ変更など

Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; 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/49939283076.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49939283076_0071cb47bc_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; Potter Mine, east of Timmins, Ontario, Canada) 1 / James St. John</span>

サイズ変更など

Faulted magnetite-quartz banded iron formation (Temagami Iron-Formation, Neoarchean, 2.736 Ga; Temagami North roadcut, Ontario, Canada)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/30773212862.html" target="_blank"><img src="http://farm6.static.flickr.com/5612/30773212862_8f36d45305_m.jpg" alt="" /></a><br />Faulted magnetite-quartz banded iron formation (Temagami Iron-Formation, Neoarchean, 2.736 Ga; Temagami North roadcut, Ontario, Canada) / James St. John</span>

サイズ変更など

Glacially eroded jaspilite banded iron formation outcrop (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, 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/19037037688.html" target="_blank"><img src="http://farm4.static.flickr.com/3885/19037037688_8901db9c27_m.jpg" alt="" /></a><br />Glacially eroded jaspilite banded iron formation outcrop (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, 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/21602319962.html" target="_blank"><img src="http://farm1.static.flickr.com/726/21602319962_f254073fe2_m.jpg" alt="" /></a><br />Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, USA) 8 / James St. John</span>

サイズ変更など

Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near 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/40860721853.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40860721853_a57dcd459d_m.jpg" alt="" /></a><br />Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 6 / 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) 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/48312784202.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48312784202_009d54e607_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 118 / 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) 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>

サイズ変更など

Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, 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/21426808069.html" target="_blank"><img src="http://farm1.static.flickr.com/618/21426808069_c6d1f52365_m.jpg" alt="" /></a><br />Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, USA) 5 / James St. John</span>

サイズ変更など

Spinifex komatiite sill in cumulate komatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near 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/47791243922.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47791243922_142764aba7_m.jpg" alt="" /></a><br />Spinifex komatiite sill in cumulate komatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 35 / James St. John</span>

サイズ変更など

Magnetite banded iron formation (BIF) (Goldman Meadows Formation, Neoarchean, 2.87 Ga; Atlantic City Iron Mine, Wind River Range, Wyoming, 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/15056362921.html" target="_blank"><img src="http://farm6.static.flickr.com/5593/15056362921_de28b76756_m.jpg" alt="" /></a><br />Magnetite banded iron formation (BIF) (Goldman Meadows Formation, Neoarchean, 2.87 Ga; Atlantic City Iron Mine, Wind River Range, Wyoming, USA) / James St. John</span>

サイズ変更など

The City of Rocks National Reserve
by RuggyBearLA

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/49022064996.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49022064996_9180878c38_m.jpg" alt="" /></a><br />The City of Rocks National Reserve / RuggyBearLA</span>

サイズ変更など

Massive Pt-Pd-rich sulfide (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, 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/50865589646.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50865589646_4a43e5700f_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) 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) 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>

サイズ変更など

Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; 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/49939287326.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49939287326_c74d5cec47_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; Potter Mine, east of Timmins, Ontario, Canada) 5 / 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) 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>

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

Black smoker rocks (sulfidic wad) (Helen Iron-Formation, Neoarchean, 2696-2749 Ma; Sir James Pit, Eleanor Iron Range, 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/48069975922.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069975922_e64775093d_m.jpg" alt="" /></a><br />Black smoker rocks (sulfidic wad) (Helen Iron-Formation, Neoarchean, 2696-2749 Ma; Sir James Pit, Eleanor Iron Range, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Metakomatiite (Diamond Springs Formation, Mesoarchean; South Pass, Wind River Range, 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/31290422921.html" target="_blank"><img src="http://farm6.static.flickr.com/5800/31290422921_0bc572dfa7_m.jpg" alt="" /></a><br />Metakomatiite (Diamond Springs Formation, Mesoarchean; South Pass, Wind River Range, Wyoming, USA) 1 / James St. John</span>

サイズ変更など

Banded iron formation (BIF) (Lower Middleback Iron-Formation, Paleoproterozoic, 1.81 or 1.859-1.945 Ga; hillslope 3 km west of Iron Duke Mine, South Middleback Range, Eyre Peninsula, South Australia) 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/15059380105.html" target="_blank"><img src="http://farm4.static.flickr.com/3879/15059380105_8c08730728_m.jpg" alt="" /></a><br />Banded iron formation (BIF) (Lower Middleback Iron-Formation, Paleoproterozoic, 1.81 or 1.859-1.945 Ga; hillslope 3 km west of Iron Duke Mine, South Middleback Range, Eyre Peninsula, South Australia) 2 / James St. John</span>

サイズ変更など

Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; 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/49939289226.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49939289226_6e1449b887_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; Potter Mine, east of Timmins, Ontario, Canada) 3 / James St. John</span>

サイズ変更など

Chromitic dunite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, Montana, 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/50861868891.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50861868891_f80a9909f6_m.jpg" alt="" /></a><br />Chromitic dunite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, Montana, USA) 5 / James St. John</span>

サイズ変更など

Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 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/32883589467.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32883589467_f1539b4c47_m.jpg" alt="" /></a><br />Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 18 / James St. John</span>

サイズ変更など

Silicified shear zone in interbedded metagraywackes-slates (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, 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/37136829626.html" target="_blank"><img src="http://farm5.static.flickr.com/4379/37136829626_41f2381fb5_m.jpg" alt="" /></a><br />Silicified shear zone in interbedded metagraywackes-slates (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, USA) 20 / James St. John</span>

サイズ変更など

Spinifex komatiite sill (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 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/40876555723.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40876555723_85628dac68_m.jpg" alt="" /></a><br />Spinifex komatiite sill (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 29 / James St. John</span>

サイズ変更など

Columnar-jointed komatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of 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/40927432633.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40927432633_dbd4617fbe_m.jpg" alt="" /></a><br />Columnar-jointed komatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 6 / 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) 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/47039048284.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47039048284_f8711d1dee_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) 21 / 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

Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 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/48312698372.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48312698372_b63aac5964_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 113 / James St. John</span>

サイズ変更など

Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; 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/49939288241.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49939288241_e3d6e1d5d0_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (copper ore) (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; Potter Mine, east of Timmins, Ontario, Canada) 4 / James St. John</span>

サイズ変更など

Sulfidic basaltic lapillistone (copper ore) (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/49939589017.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49939589017_c4809cf1ac_m.jpg" alt="" /></a><br />Sulfidic basaltic lapillistone (copper ore) (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

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

Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 38
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/32884394287.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32884394287_b1786f6903_m.jpg" alt="" /></a><br />Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 38 / James St. John</span>

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Quartz with hematite inclusions (hosted in Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, 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/23489749422.html" target="_blank"><img src="http://farm1.static.flickr.com/628/23489749422_f23ef113c0_m.jpg" alt="" /></a><br />Quartz with hematite inclusions (hosted in Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 5 / James St. John</span>

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Magnetite-rich banded iron-formation (BIF) (Michipicoten Iron-Formation, Neoarchean, 2696-2749 Ma; outcrop above Route 17 roadcut east of Bridget Lake, south of Wawa, Ontario, Canada) 74
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/48070058917.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48070058917_4fd2e2e680_m.jpg" alt="" /></a><br />Magnetite-rich banded iron-formation (BIF) (Michipicoten Iron-Formation, Neoarchean, 2696-2749 Ma; outcrop above Route 17 roadcut east of Bridget Lake, south of Wawa, Ontario, Canada) 74 / James St. John</span>

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Molybdenite in quartz-rich pegmatitic granite (Abitibi Greenstone Belt, Precambrian; Moly Hill Mine, Quebec, 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/19236032102.html" target="_blank"><img src="http://farm1.static.flickr.com/452/19236032102_de4d526ab5_m.jpg" alt="" /></a><br />Molybdenite in quartz-rich pegmatitic granite (Abitibi Greenstone Belt, Precambrian; Moly Hill Mine, Quebec, Canada) 2 / James St. John</span>

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Talc schist with antigorite serpentine & dolomite (Deer Lake Peridotite, late Neoarchean; Ropes Gold Mine, Upper Peninsula of Michigan, 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/49146477246.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49146477246_8bf9ac4507_m.jpg" alt="" /></a><br />Talc schist with antigorite serpentine & dolomite (Deer Lake Peridotite, late Neoarchean; Ropes Gold Mine, Upper Peninsula of Michigan, USA) / James St. John</span>

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End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, 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/23127387443.html" target="_blank"><img src="http://farm6.static.flickr.com/5629/23127387443_b44d3707ff_m.jpg" alt="" /></a><br />End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 10 / James St. John</span>

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Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 40
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/47039120874.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47039120874_99d3e66f47_m.jpg" alt="" /></a><br />Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 40 / 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) 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>

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Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, 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/22451385585.html" target="_blank"><img src="http://farm1.static.flickr.com/691/22451385585_3f24392183_m.jpg" alt="" /></a><br />Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 3 / James St. John</span>

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Gneiss (Archean; Windy Lake Northwest roadcut, Sudbury Impact Structure, 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/47735880691.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47735880691_1a69a6ff54_m.jpg" alt="" /></a><br />Gneiss (Archean; Windy Lake Northwest roadcut, Sudbury Impact Structure, Ontario, Canada) 4 / James St. John</span>

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Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, 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/21425633360.html" target="_blank"><img src="http://farm1.static.flickr.com/695/21425633360_d0d899af8f_m.jpg" alt="" /></a><br />Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, USA) 12 / 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) 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>

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Lamprophyre with xenolith (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 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/48296814297.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48296814297_13b77ec065_m.jpg" alt="" /></a><br />Lamprophyre with xenolith (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 26 / 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) 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/47826086082.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47826086082_2747397258_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) 2 / 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) 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>

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Jaspilite banded iron formation (BIF) (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Jasper Knob, Ishpeming, Michigan, 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/32709818015.html" target="_blank"><img src="http://farm1.static.flickr.com/490/32709818015_6a0c3401d1_m.jpg" alt="" /></a><br />Jaspilite banded iron formation (BIF) (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Jasper Knob, Ishpeming, Michigan, USA) 2 / James St. John</span>

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Staurolite schist (Keivy Schist; Mt. Ploskaya, Kola Peninsula, Russia) 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/52741816475.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52741816475_f8b6275bcd_m.jpg" alt="" /></a><br />Staurolite schist (Keivy Schist; Mt. Ploskaya, Kola Peninsula, Russia) 12 / James St. John</span>

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Bismuthinite & molybdenite in pegmatitic granite (Preissac-Lacorne Batholith, Neoarchean, 2.630-2.675 Ga; Moly Hill, Quebec, 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/18903767866.html" target="_blank"><img src="http://farm4.static.flickr.com/3931/18903767866_855185af51_m.jpg" alt="" /></a><br />Bismuthinite & molybdenite in pegmatitic granite (Preissac-Lacorne Batholith, Neoarchean, 2.630-2.675 Ga; Moly Hill, Quebec, Canada) 2 / 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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Banded iron formation (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Cliffs Shaft Mine, Ishpeming, Michigan, 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/49731984236.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49731984236_391e5508cc_m.jpg" alt="" /></a><br />Banded iron formation (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Cliffs Shaft Mine, Ishpeming, Michigan, USA) 1 / James St. John</span>

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Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 41
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/50526467693.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50526467693_ba94e4a8c6_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 41 / James St. John</span>

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Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 121
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/48312756482.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48312756482_847635d5ac_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 121 / James St. John</span>

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Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, 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/18602385204.html" target="_blank"><img src="http://farm1.static.flickr.com/394/18602385204_a282bf9c46_m.jpg" alt="" /></a><br />Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 23 / James St. John</span>

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Hematite-rich iron ore (Precambrian; Pioneer Mine, Ely, Minnesota, 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/50542570402.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50542570402_57d74a7a4f_m.jpg" alt="" /></a><br />Hematite-rich iron ore (Precambrian; Pioneer Mine, Ely, Minnesota, USA) 2 / James St. John</span>

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Vesicular metakomatiite (serpentinized) (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; west-southwest of 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/40920560893.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40920560893_29386a199e_m.jpg" alt="" /></a><br />Vesicular metakomatiite (serpentinized) (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; west-southwest of the Potter Mine, east of Timmins, Ontario, Canada) 6 / James St. John</span>

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