archean

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Archean Rock
by D-Stanley

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52634408832.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52634408832_e4931b0d50_m.jpg" alt="" /></a><br />Archean Rock / D-Stanley</span>

サイズ変更など

Lady Franklin Island
by D-Stanley

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/54080513584.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54080513584_1ab2d961f6_m.jpg" alt="" /></a><br />Lady Franklin Island / D-Stanley</span>

サイズ変更など

NASA Team Looks to Ancient Earth First to Study Hazy Exoplanets
by NASA Goddard Photo and Video

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32407459560.html" target="_blank"><img src="http://farm1.static.flickr.com/300/32407459560_0e434ea036_m.jpg" alt="" /></a><br />NASA Team Looks to Ancient Earth First to Study Hazy Exoplanets / NASA Goddard Photo and Video</span>

サイズ変更など

Migmatite (Archean, ~3.4 to 3.5 Ga; 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/23247653830.html" target="_blank"><img src="http://farm6.static.flickr.com/5799/23247653830_e9e6fb0c23_m.jpg" alt="" /></a><br />Migmatite (Archean, ~3.4 to 3.5 Ga; Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Migmatite (Archean, ~ 3.524 Ga; 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/49156026641.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49156026641_fc511704c1_m.jpg" alt="" /></a><br />Migmatite (Archean, ~ 3.524 Ga; Minnesota, USA) 2 / 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) 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/21426722099.html" target="_blank"><img src="http://farm1.static.flickr.com/662/21426722099_c313263691_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) 13 / James St. John</span>

サイズ変更など

Migmatite (Archean, ~ 3.524 Ga; 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/49156025601.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49156025601_fe376eb204_m.jpg" alt="" /></a><br />Migmatite (Archean, ~ 3.524 Ga; Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Migmatite (Archean, ~3.4 to 3.5 Ga; 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/22915182614.html" target="_blank"><img src="http://farm6.static.flickr.com/5795/22915182614_28dd5f7a38_m.jpg" alt="" /></a><br />Migmatite (Archean, ~3.4 to 3.5 Ga; Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Migmatite (Archean, ~3.4 to 3.5 Ga; 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/23434889782.html" target="_blank"><img src="http://farm1.static.flickr.com/664/23434889782_76b079996b_m.jpg" alt="" /></a><br />Migmatite (Archean, ~3.4 to 3.5 Ga; Minnesota, USA) 2 / James St. John</span>

サイズ変更など

Migmatite (Archean, ~3.4 to 3.5 Ga; 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/23517332506.html" target="_blank"><img src="http://farm1.static.flickr.com/759/23517332506_817b5dff69_m.jpg" alt="" /></a><br />Migmatite (Archean, ~3.4 to 3.5 Ga; Minnesota, USA) 3 / James St. John</span>

サイズ変更など

Verdite (microcrystalline fuchsite metamorphite) (Archean; South Africa)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15026553307.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/15026553307_032e7568d2_m.jpg" alt="" /></a><br />Verdite (microcrystalline fuchsite metamorphite) (Archean; South Africa) / James St. John</span>

サイズ変更など

Lapis lazuli (lazuritic gneiss) (Sar-e-Sang Deposit, Sakhi Formation, Precambrian, 2.4-2.7 Ga (?); Sar-e-Sang Mining District, Hindu-Kush Mountains, Afghanistan) 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/47595980361.html" target="_blank"><img src="http://farm8.static.flickr.com/7852/47595980361_47ac04c2c4_m.jpg" alt="" /></a><br />Lapis lazuli (lazuritic gneiss) (Sar-e-Sang Deposit, Sakhi Formation, Precambrian, 2.4-2.7 Ga (?); Sar-e-Sang Mining District, Hindu-Kush Mountains, Afghanistan) 3 / James St. John</span>

サイズ変更など

Greenlandite (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 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/51497526676.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51497526676_b73a1c25fb_m.jpg" alt="" /></a><br />Greenlandite (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 5 / James St. John</span>

サイズ変更など

Twin Lakes area along the Beartooth Highway (Beartooth Mountains, northwestern 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/15306100637.html" target="_blank"><img src="http://farm4.static.flickr.com/3941/15306100637_0a3904fcab_m.jpg" alt="" /></a><br />Twin Lakes area along the Beartooth Highway (Beartooth Mountains, northwestern Wyoming, USA) / James St. John</span>

サイズ変更など

Banded iron formation (Paleoproterozoic; 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/52330042648.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52330042648_5b048f5af1_m.jpg" alt="" /></a><br />Banded iron formation (Paleoproterozoic; Upper Peninsula of Michigan USA) / James St. John</span>

サイズ変更など

Rock Creek Vista Point (Beartooth Mountains, southern 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/15492817075.html" target="_blank"><img src="http://farm4.static.flickr.com/3929/15492817075_9678bfd47e_m.jpg" alt="" /></a><br />Rock Creek Vista Point (Beartooth Mountains, southern Montana, USA) / James St. John</span>

サイズ変更など

Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, 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/51501870938.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51501870938_98dcb7f428_m.jpg" alt="" /></a><br />Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, Ontario, Canada) 4 / James St. John</span>

サイズ変更など

Stillwater River (near the Stillwater Mine, Beartooth Mountains, Montana, USA) 22
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52398910205.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52398910205_12c901b3f3_m.jpg" alt="" /></a><br />Stillwater River (near the Stillwater Mine, Beartooth Mountains, Montana, USA) 22 / James St. John</span>

サイズ変更など

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/31653981728.html" target="_blank"><img src="http://farm2.static.flickr.com/1966/31653981728_548bd1b9e6_m.jpg" alt="" /></a><br />Gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 2 / James St. John</span>

サイズ変更など

"Tan Brown Granite" (porphyritic granite, Archean; Andhra Pradesh State, southern India)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14618910269.html" target="_blank"><img src="http://farm4.static.flickr.com/3859/14618910269_81618287ac_m.jpg" alt="" /></a><br />"Tan Brown Granite" (porphyritic granite, Archean; Andhra Pradesh State, southern India) / James St. John</span>

サイズ変更など

Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, 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/51501644996.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51501644996_f48f37f1ae_m.jpg" alt="" /></a><br />Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, Ontario, Canada) 3 / James St. John</span>

サイズ変更など

Quartz-pebble metaconglomerate (Jack Hills Quartzite, Archean, 2.65 to 3.05 Ga; Jack Hills, Western 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/27178967132.html" target="_blank"><img src="http://farm8.static.flickr.com/7426/27178967132_f8013d65fb_m.jpg" alt="" /></a><br />Quartz-pebble metaconglomerate (Jack Hills Quartzite, Archean, 2.65 to 3.05 Ga; Jack Hills, Western Australia) 2 / James St. John</span>

サイズ変更など

Magnetitic serpentinite (Red Lodge Chromite District, Precambrian; Rock Creek Canyon, 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/52476878682.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52476878682_edbc4ff505_m.jpg" alt="" /></a><br />Magnetitic serpentinite (Red Lodge Chromite District, Precambrian; Rock Creek Canyon, Beartooth Mountains, Montana, USA) 2 / James St. John</span>

サイズ変更など

Meta-iron formation (Archean; Quad Creek section - Beartooth Highway roadcut, Beartooth Mountains, Montana, 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/52615185403.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52615185403_cb2717da03_m.jpg" alt="" /></a><br />Meta-iron formation (Archean; Quad Creek section - Beartooth Highway roadcut, Beartooth Mountains, Montana, USA) 7 / James St. John</span>

サイズ変更など

Serpentinite with chrysotile asbestos (Archean; Casper Mountain, Natrona County, 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/49145813948.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49145813948_a3fae772e9_m.jpg" alt="" /></a><br />Serpentinite with chrysotile asbestos (Archean; Casper Mountain, Natrona County, Wyoming, USA / 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) 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/15067510238.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/15067510238_9c4a85b47a_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 1 / James St. John</span>

サイズ変更など

Beartooth Mountains & Stillwater Mine (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/52398574379.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52398574379_29d8af088d_m.jpg" alt="" /></a><br />Beartooth Mountains & Stillwater Mine (Montana, USA) 2 / James St. John</span>

サイズ変更など

Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 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/51498243654.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51498243654_1fa3bfbe80_m.jpg" alt="" /></a><br />Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 3 / James St. John</span>

サイズ変更など

Komatiite pebble-bearing polymict conglomerate (Timiskaming Conglomerate, Neoarchean, <2.674 Ga; Kirkland Lake, 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/14851629327.html" target="_blank"><img src="http://farm4.static.flickr.com/3851/14851629327_48f8fd8574_m.jpg" alt="" /></a><br />Komatiite pebble-bearing polymict conglomerate (Timiskaming Conglomerate, Neoarchean, <2.674 Ga; Kirkland Lake, Ontario, Canada) 1 / James St. John</span>

サイズ変更など

Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 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/14882301487.html" target="_blank"><img src="http://farm4.static.flickr.com/3868/14882301487_1d060837bd_m.jpg" alt="" /></a><br />Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 1 / James St. John</span>

サイズ変更など

Muscovitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie 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/15254062135.html" target="_blank"><img src="http://farm6.static.flickr.com/5576/15254062135_8a49a0cc7b_m.jpg" alt="" /></a><br />Muscovitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 1 / James St. John</span>

サイズ変更など

"Dakota Mahogany Granite" (porphyritic granite, Milbank Granite, 2.588 to 2.723 Ga, Neoarchean; east of Milbank, South Dakota, 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/14618866119.html" target="_blank"><img src="http://farm3.static.flickr.com/2940/14618866119_4f518dfacf_m.jpg" alt="" /></a><br />"Dakota Mahogany Granite" (porphyritic granite, Milbank Granite, 2.588 to 2.723 Ga, Neoarchean; east of Milbank, South Dakota, USA) / James St. John</span>

サイズ変更など

Bear's Tooth (Beartooth Mountains, Montana, USA) 11
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52479192787.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52479192787_378bac1c03_m.jpg" alt="" /></a><br />Bear's Tooth (Beartooth Mountains, Montana, USA) 11 / James St. John</span>

サイズ変更など

Twin Lakes (Beartooth Mountains, Wyoming, 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/52532940426.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52532940426_430bbd121c_m.jpg" alt="" /></a><br />Twin Lakes (Beartooth Mountains, Wyoming, USA) 30 / James St. John</span>

サイズ変更など

Spinifex metakomatiite (serpentinite) (Komati Formation, Paleoarchean, 3.481-3.482 Ga; Komati River Valley, South Africa) 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/15024944522.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/15024944522_660c9728b8_m.jpg" alt="" /></a><br />Spinifex metakomatiite (serpentinite) (Komati Formation, Paleoarchean, 3.481-3.482 Ga; Komati River Valley, South Africa) 1 / James St. John</span>

サイズ変更など

Gabbro (Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater County, 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/49951216382.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49951216382_0efa1593e4_m.jpg" alt="" /></a><br />Gabbro (Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater County, Montana, USA) / 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) 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/50526475008.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50526475008_8a8b909606_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 32 / James St. John</span>

サイズ変更など

Komatiite pebble-bearing polymict conglomerate (Timiskaming Conglomerate, Neoarchean, <2.674 Ga; Kirkland Lake, 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/15035122421.html" target="_blank"><img src="http://farm4.static.flickr.com/3855/15035122421_384438e471_m.jpg" alt="" /></a><br />Komatiite pebble-bearing polymict conglomerate (Timiskaming Conglomerate, Neoarchean, <2.674 Ga; Kirkland Lake, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Volcanogenic massive sulfide (Kidd Creek Deposit, Neoarchean, 2.711-2.717 Ga; Kidd Creek Mine, north 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/52562186983.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52562186983_5bdc8af719_m.jpg" alt="" /></a><br />Volcanogenic massive sulfide (Kidd Creek Deposit, Neoarchean, 2.711-2.717 Ga; Kidd Creek Mine, north of Timmins, Ontario, Canada) 2 / 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) 48
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52365879265.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52365879265_ccfdcc62e8_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) 48 / James St. John</span>

サイズ変更など

Amphibolite (Archean, 3.1-3.2 Ga; Norris South 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/45625451951.html" target="_blank"><img src="http://farm2.static.flickr.com/1950/45625451951_decc4f516d_m.jpg" alt="" /></a><br />Amphibolite (Archean, 3.1-3.2 Ga; Norris South roadcut, Madison County, Montana, USA) 2 / James St. John</span>

サイズ変更など

Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 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/51498451960.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51498451960_4848edf111_m.jpg" alt="" /></a><br />Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 4 / 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/49056369077.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49056369077_af2c92e573_m.jpg" alt="" /></a><br />The City of Rocks National Reserve / RuggyBearLA</span>

サイズ変更など

Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 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/51498243589.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51498243589_c09a3ef47f_m.jpg" alt="" /></a><br />Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) 2 / James St. John</span>

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BIF ventifact (hematite-rich banded iron formation, Archean; Ferris Dune Field, Windy Gap, Wyoming, 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/26052629496.html" target="_blank"><img src="http://farm2.static.flickr.com/1646/26052629496_4f3f34b711_m.jpg" alt="" /></a><br />BIF ventifact (hematite-rich banded iron formation, Archean; Ferris Dune Field, Windy Gap, Wyoming, USA) 2 / James St. John</span>

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Tarn & cirque (Gardner Lake, Beartooth Mountains, Wyoming, 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/52518794298.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52518794298_9e680ae610_m.jpg" alt="" /></a><br />Tarn & cirque (Gardner Lake, Beartooth Mountains, Wyoming, USA) 2 / James St. John</span>

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Auriferous, pyritic, quartz-pebble conglomerate (gold ore) (Vaal Reef, Witwatersrand Supergroup, Neoarchean, 2.76-2.89 Ga; Stilfontein Mine, North West Province, South Africa) 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/15037717455.html" target="_blank"><img src="http://farm6.static.flickr.com/5567/15037717455_b87f0a6fb6_m.jpg" alt="" /></a><br />Auriferous, pyritic, quartz-pebble conglomerate (gold ore) (Vaal Reef, Witwatersrand Supergroup, Neoarchean, 2.76-2.89 Ga; Stilfontein Mine, North West Province, South Africa) 1 / James St. John</span>

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Graphitic BIF (meta-BIF) (Eoarchean, 3.8 Ga; Isua Supracrustal Belt, southwestern Greenland)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15056531391.html" target="_blank"><img src="http://farm6.static.flickr.com/5570/15056531391_d5c6235ce4_m.jpg" alt="" /></a><br />Graphitic BIF (meta-BIF) (Eoarchean, 3.8 Ga; Isua Supracrustal Belt, southwestern Greenland) / James St. John</span>

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Migmatite (Morton Gneiss Complex, Archean, ~3.524 Ga; Cold Spring Granite Company quarry, Morton, 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/41897958622.html" target="_blank"><img src="http://farm1.static.flickr.com/971/41897958622_c1fa0e76c8_m.jpg" alt="" /></a><br />Migmatite (Morton Gneiss Complex, Archean, ~3.524 Ga; Cold Spring Granite Company quarry, Morton, Minnesota, USA) 3 / James St. John</span>

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Watersmeet Gneiss (early Paleoarchean, 3.56 Ga; Watersmeet, 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/26994118290.html" target="_blank"><img src="http://farm8.static.flickr.com/7512/26994118290_28a8899731_m.jpg" alt="" /></a><br />Watersmeet Gneiss (early Paleoarchean, 3.56 Ga; Watersmeet, Upper Peninsula of Michigan, USA) / James St. John</span>

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Gold-quartz hydrothermal vein (Neoarchean; Bissett Mine, southeastern Manitoba, southern 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/15067067648.html" target="_blank"><img src="http://farm4.static.flickr.com/3869/15067067648_546e379ae7_m.jpg" alt="" /></a><br />Gold-quartz hydrothermal vein (Neoarchean; Bissett Mine, southeastern Manitoba, southern Canada) 1 / James St. John</span>

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"Sapphire Brown Granite" (porphyritic granite, Andhra Pradesh State, southern India)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14618840880.html" target="_blank"><img src="http://farm6.static.flickr.com/5596/14618840880_8c65707b42_m.jpg" alt="" /></a><br />"Sapphire Brown Granite" (porphyritic granite, Andhra Pradesh State, southern India) / James St. John</span>

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Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 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/50526456043.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50526456043_fbe704dcef_m.jpg" alt="" /></a><br />Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, >2.54 Ga; Laramie Range, Wyoming, USA) 46 / James St. John</span>

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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/49018410667.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49018410667_4e1fa330f2_m.jpg" alt="" /></a><br />The City of Rocks National Reserve / RuggyBearLA</span>

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Magnetite-garnet-quartz meta-iron formation (Archean; Quad Creek section - Beartooth Highway roadcut, Beartooth Mountains, Montana, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15196729426.html" target="_blank"><img src="http://farm6.static.flickr.com/5592/15196729426_40b4b44a98_m.jpg" alt="" /></a><br />Magnetite-garnet-quartz meta-iron formation (Archean; Quad Creek section - Beartooth Highway roadcut, Beartooth Mountains, Montana, USA) 1 / James St. John</span>

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Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, 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/24614563415.html" target="_blank"><img src="http://farm2.static.flickr.com/1614/24614563415_08f3412803_m.jpg" alt="" /></a><br />Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, Ontario, Canada) 2 / James St. John</span>

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Stillwater Complex (Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 11
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52365681323.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52365681323_5a1b3d19df_m.jpg" alt="" /></a><br />Stillwater Complex (Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 11 / 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) 111
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48312595981.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48312595981_20776e2125_m.jpg" alt="" /></a><br />Lamprophyre with xenoliths (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 111 / James St. John</span>

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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/44800968564.html" target="_blank"><img src="http://farm2.static.flickr.com/1930/44800968564_ca8ffed416_m.jpg" alt="" /></a><br />Gneiss (Archean; Ennis Lake North roadcut, Madison County, Montana, USA) 1 / James St. John</span>

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Diamondites (carbonado diamonds) (3.2 Ga, Mesoarchean; Bangui region, Central African Republic)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14618393527.html" target="_blank"><img src="http://farm4.static.flickr.com/3896/14618393527_995fa03293_m.jpg" alt="" /></a><br />Diamondites (carbonado diamonds) (3.2 Ga, Mesoarchean; Bangui region, Central African Republic) / James St. John</span>

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