archean

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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) 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/19198997276.html" target="_blank"><img src="http://farm1.static.flickr.com/518/19198997276_7beef6890e_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) 2 / James St. John</span>

サイズ変更など

Isoclinal fold in gneiss (Archean; Ennis Lake North roadcut, Madison County, 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/44609752175.html" target="_blank"><img src="http://farm2.static.flickr.com/1933/44609752175_1bffff4935_m.jpg" alt="" /></a><br />Isoclinal fold in gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 1 / James St. John</span>

サイズ変更など

Gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, 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/31653984278.html" target="_blank"><img src="http://farm2.static.flickr.com/1978/31653984278_5bff4591cd_m.jpg" alt="" /></a><br />Gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 10 / 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) 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/46961832295.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46961832295_69760c0af4_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) 4 / James St. John</span>

サイズ変更など

Braggite (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/21125462876.html" target="_blank"><img src="http://farm1.static.flickr.com/710/21125462876_17c8a919ef_m.jpg" alt="" /></a><br />Braggite (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) / James St. John</span>

サイズ変更など

Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 101
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375887475.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375887475_1592fd8ea6_m.jpg" alt="" /></a><br />Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 101 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (BIF) (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Jasper Knob, Ishpeming, Michigan, USA) 45
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47970243781.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47970243781_e80eae5125_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) 45 / James St. John</span>

サイズ変更など

Impact-pulverized iron formation (Early Permian, ~280 Ma; Terny Impact Crater, Ukraine) 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/50680549063.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50680549063_730f18be95_m.jpg" alt="" /></a><br />Impact-pulverized iron formation (Early Permian, ~280 Ma; Terny Impact Crater, Ukraine) 10 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (BIF) (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Jasper Knob, Ishpeming, Michigan, USA) 58
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47970581496.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47970581496_d74ecf167e_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) 58 / 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

Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 47
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50527183356.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50527183356_888e2dd4be_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 47 / James St. John</span>

サイズ変更など

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) 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/32912747507.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32912747507_0f302cee5c_m.jpg" alt="" /></a><br />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) 2 / James St. John</span>

サイズ変更など

Interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Rt. 169 roadcut between Tower and Peyla, 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/21575068242.html" target="_blank"><img src="http://farm6.static.flickr.com/5701/21575068242_56a56714b5_m.jpg" alt="" /></a><br />Interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, 2.695-2.722 Ga; Rt. 169 roadcut between Tower and Peyla, Minnesota, USA) 2 / 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) 60
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/46918819485.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46918819485_ebd8d06cdd_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) 60 / James St. John</span>

サイズ変更など

Clast-rich impact pseudotachylite (Sudbury Breccia, Paleoproterozoic, 1.85 Ga; Crab Lake South roadcut, south-southeast of Cartier, 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/32791637707.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32791637707_596a1404b2_m.jpg" alt="" /></a><br />Clast-rich impact pseudotachylite (Sudbury Breccia, Paleoproterozoic, 1.85 Ga; Crab Lake South roadcut, south-southeast of Cartier, Ontario, Canada) 1 / James St. John</span>

サイズ変更など

Sulfidic norite (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/50823991307.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50823991307_f1db9a6b30_m.jpg" alt="" /></a><br />Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga;  Stillwater Mine, Beartooth Mountains, Montana, USA) 4 / James St. John</span>

サイズ変更など

Greenstone (metamorphosed pillow basalt) (Mona Formation, Neoarchean, 2.7 Ga; Rt. 41/Rt. 28 roadcut west of Marquette, 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/8281286349.html" target="_blank"><img src="http://farm9.static.flickr.com/8080/8281286349_fccda67f4b_m.jpg" alt="" /></a><br />Greenstone (metamorphosed pillow basalt) (Mona Formation, Neoarchean, 2.7 Ga; Rt. 41/Rt. 28 roadcut west of Marquette, Michigan, USA) 1 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, 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/19219171952.html" target="_blank"><img src="http://farm1.static.flickr.com/332/19219171952_51c3fa79ec_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) 5 / James St. John</span>

サイズ変更など

Bismuthinite & molybdenite in pegmatitic granite (Preissac-Lacorne Batholith, Neoarchean, 2.630-2.675 Ga; Moly Hill, Quebec, 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/18307442934.html" target="_blank"><img src="http://farm1.static.flickr.com/497/18307442934_3b853ed23e_m.jpg" alt="" /></a><br />Bismuthinite & molybdenite in pegmatitic granite (Preissac-Lacorne Batholith, Neoarchean, 2.630-2.675 Ga; Moly Hill, Quebec, Canada) 1 / 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) 32
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/40876562433.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40876562433_f2752f21e8_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) 32 / James St. John</span>

サイズ変更など

Faulted gneiss (Archean; Ennis Lake North roadcut, Madison County, 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/44800967484.html" target="_blank"><img src="http://farm2.static.flickr.com/1971/44800967484_a9e1c10043_m.jpg" alt="" /></a><br />Faulted gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 3 / James St. John</span>

サイズ変更など

Beartooth Mountains & Rock Creek Canyon (Montana, 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/52466061061.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52466061061_bbf5242471_m.jpg" alt="" /></a><br />Beartooth Mountains & Rock Creek Canyon (Montana, USA) 8 / James St. John</span>

サイズ変更など

Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50823896951.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50823896951_7dcb94fdc8_m.jpg" alt="" /></a><br />Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga;  Stillwater Mine, Beartooth Mountains, Montana, USA) 6 / James St. John</span>

サイズ変更など

End-Pleistocene pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, 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/23657418431.html" target="_blank"><img src="http://farm1.static.flickr.com/726/23657418431_83dd0d2f39_m.jpg" alt="" /></a><br />End-Pleistocene pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 2 / 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) 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/46912474475.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46912474475_216d639298_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) 14 / 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) 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/21266493698.html" target="_blank"><img src="http://farm6.static.flickr.com/5781/21266493698_f245084cd8_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 12 / James St. John</span>

サイズ変更など

Grand Teton (Teton Range, Grand Teton National Park, 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/19771495898.html" target="_blank"><img src="http://farm1.static.flickr.com/375/19771495898_1295350d8d_m.jpg" alt="" /></a><br />Grand Teton (Teton Range, Grand Teton National Park, Wyoming, USA) / 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) 46
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32899345697.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32899345697_c91e9d7b5c_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) 46 / 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) 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/21443427352.html" target="_blank"><img src="http://farm1.static.flickr.com/579/21443427352_b313ff0d74_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (BIF) (Vulcan Iron-Formation, Paleoproterozoic, ~1.8 Ga; Iron Mountain, Menominee Iron Range, 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/15059116882.html" target="_blank"><img src="http://farm4.static.flickr.com/3861/15059116882_f318700fab_m.jpg" alt="" /></a><br />Jaspilite banded iron formation (BIF) (Vulcan Iron-Formation, Paleoproterozoic, ~1.8 Ga; Iron Mountain, Menominee Iron Range, Upper Peninsula of Michigan, USA) / James St. John</span>

サイズ変更など

Sulfidic bronzitite (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/30800357083.html" target="_blank"><img src="http://farm1.static.flickr.com/572/30800357083_14cf91e438_m.jpg" alt="" /></a><br />Sulfidic bronzitite (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

Jaspilite banded iron formation (BIF) (Temagami Iron-Formation, Neoarchean, 2.736 Ga; Sherman Iron Mine, Temagami, 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/50863362018.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50863362018_d99067ca11_m.jpg" alt="" /></a><br />Jaspilite banded iron formation (BIF) (Temagami Iron-Formation, Neoarchean, 2.736 Ga; Sherman Iron Mine, Temagami, 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) 124
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48312740952.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48312740952_aa825ec6b4_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 124 / 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

Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, 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/50527180356.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50527180356_1e90f63f6a_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 28 / James St. John</span>

サイズ変更など

Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 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/33949847288.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33949847288_395fb7d3c2_m.jpg" alt="" /></a><br />Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 7 / 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) 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/21443450902.html" target="_blank"><img src="http://farm1.static.flickr.com/582/21443450902_2f8836b684_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Staurolite schist (Keivy Schist; Mt. Ploskaya, Kola Peninsula, Russia) 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/52741400666.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52741400666_f7411ba5ca_m.jpg" alt="" /></a><br />Staurolite schist (Keivy Schist; Mt. Ploskaya, Kola Peninsula, Russia) 17 / James St. John</span>

サイズ変更など

Lamprophyre with xenolith (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, 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/48296202231.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48296202231_f66229ffca_m.jpg" alt="" /></a><br />Lamprophyre with xenolith (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 13 / James St. John</span>

サイズ変更など

Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, 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/18854607379.html" target="_blank"><img src="http://farm1.static.flickr.com/404/18854607379_bccdb9ac60_m.jpg" alt="" /></a><br />Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, Minnesota, USA) 13 / James St. John</span>

サイズ変更など

Gneiss (Archean; Ennis Lake North roadcut, Madison County, 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/31653982318.html" target="_blank"><img src="http://farm2.static.flickr.com/1966/31653982318_6e3878f7d0_m.jpg" alt="" /></a><br />Gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 4 / 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) 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/8282343536.html" target="_blank"><img src="http://farm9.static.flickr.com/8363/8282343536_6db3fb481d_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) 1 / James St. John</span>

サイズ変更など

Rock Creek Canyon (Beartooth Mountains, Montana, USA) 59
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52505137837.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52505137837_2a16ff50fc_m.jpg" alt="" /></a><br />Rock Creek Canyon (Beartooth Mountains, Montana, USA) 59 / 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) 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/32928654767.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32928654767_1f1ff276fd_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) 15 / James St. John</span>

サイズ変更など

Metakomatiite (Diamond Springs Formation, Mesoarchean; South Pass, Wind River Range, Wyoming, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31260953932.html" target="_blank"><img src="http://farm6.static.flickr.com/5791/31260953932_a6d0289701_m.jpg" alt="" /></a><br />Metakomatiite (Diamond Springs Formation, Mesoarchean; South Pass, Wind River Range, Wyoming, USA) 5 / James St. John</span>

サイズ変更など

Chromitite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, 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/50433664571.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50433664571_8fea572938_m.jpg" alt="" /></a><br />Chromitite (Stillwater Complex, Neoarchean, 2.71 Ga; Beartooth Mountains, Montana, USA) 2 / James St. John</span>

サイズ変更など

Metakomatiites (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near 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/33951425668.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33951425668_a513064088_m.jpg" alt="" /></a><br />Metakomatiites (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 47
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/19199460946.html" target="_blank"><img src="http://farm1.static.flickr.com/519/19199460946_24d11fa10c_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) 47 / 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) 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/21266504268.html" target="_blank"><img src="http://farm1.static.flickr.com/686/21266504268_4b68673f66_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 11 / James St. John</span>

サイズ変更など

Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, 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/19035255772.html" target="_blank"><img src="http://farm1.static.flickr.com/344/19035255772_02285b703b_m.jpg" alt="" /></a><br />Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, Minnesota, USA) 12 / James St. John</span>

サイズ変更など

Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 43
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50526459298.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50526459298_2e96d08fd5_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 43 / James St. John</span>

サイズ変更など

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 39
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/18605078153.html" target="_blank"><img src="http://farm4.static.flickr.com/3822/18605078153_bf9c130a85_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) 39 / James St. John</span>

サイズ変更など

Impact-pulverized iron formation (Early Permian, ~280 Ma; Terny Impact Crater, Ukraine) 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/50681307381.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50681307381_21bb1e7fc8_m.jpg" alt="" /></a><br />Impact-pulverized iron formation (Early Permian, ~280 Ma; Terny Impact Crater, Ukraine) 11 / James St. John</span>

サイズ変更など

Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, 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/36514310493.html" target="_blank"><img src="http://farm5.static.flickr.com/4411/36514310493_5edcba9e0f_m.jpg" alt="" /></a><br />Magnetite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Rt. 169 roadcut between Soudan & Robinson, Minnesota, USA) 23 / James St. John</span>

サイズ変更など

Chlorite-sericite-quartz phyllite (Mona Formation, Neoarchean, 2.7 Ga; Harvey Quarry, Marquette, 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/8281289773.html" target="_blank"><img src="http://farm9.static.flickr.com/8215/8281289773_b8050e2601_m.jpg" alt="" /></a><br />Chlorite-sericite-quartz phyllite (Mona Formation, Neoarchean, 2.7 Ga; Harvey Quarry, Marquette, Michigan, 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) 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/21267457139.html" target="_blank"><img src="http://farm1.static.flickr.com/713/21267457139_fd27b6f565_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 10 / 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) 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/21428138146.html" target="_blank"><img src="http://farm1.static.flickr.com/579/21428138146_a1122e641b_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 9 / James St. John</span>

サイズ変更など

Banded iron-formation over basement rocks (Archean; Route 17 roadcut east of Bridget Lake, south of Wawa, 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/48263545362.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48263545362_dc72863767_m.jpg" alt="" /></a><br />Banded iron-formation over basement rocks (Archean; Route 17 roadcut east of Bridget Lake, south of Wawa, Ontario, Canada) 23 / James St. John</span>

サイズ変更など

Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 27
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/46911884665.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46911884665_2a550c1cb7_m.jpg" alt="" /></a><br />Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 27 / 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) 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/20831537924.html" target="_blank"><img src="http://farm1.static.flickr.com/748/20831537924_5e747c9768_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 21 / James St. John</span>

サイズ変更など

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