jaspilite

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Jaspilite banded iron formation (BIF) (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Jasper Knob, Ishpeming, Michigan, USA) 112
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069755416.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069755416_9a04017fef_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) 112 / James St. John</span>

サイズ変更など

Slightly magnetitic argillite interbed in banded iron formation (Temagami Iron-Formation, Neoarchean, ~2.736 Ga; Temagami North roadcut, Temagami, 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/46899202145.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46899202145_8562d11576_m.jpg" alt="" /></a><br />Slightly magnetitic argillite interbed in banded iron formation (Temagami Iron-Formation, Neoarchean, ~2.736 Ga; Temagami North roadcut, Temagami, Ontario, Canada) 3 / James St. John</span>

サイズ変更など

Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, Minnesota, USA) 7
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/21537710581.html" target="_blank"><img src="http://farm6.static.flickr.com/5814/21537710581_d1f109b367_m.jpg" alt="" /></a><br />Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, Minnesota, USA) 7 / 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) 133
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069872617.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069872617_ca9936a3d4_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) 133 / James St. John</span>

サイズ変更など

Quartzite & pebbly quartzite with jasper (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, 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/47708852131.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47708852131_ca19049ccc_m.jpg" alt="" /></a><br />Quartzite & pebbly quartzite with jasper (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 1 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 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/23688850746.html" target="_blank"><img src="http://farm1.static.flickr.com/685/23688850746_ec58a493dc_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 27 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 75
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47656734662.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47656734662_81295d63a3_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 75 / James St. John</span>

サイズ変更など

Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, 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/20906271444.html" target="_blank"><img src="http://farm1.static.flickr.com/620/20906271444_ba7189ddc6_m.jpg" alt="" /></a><br />Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, 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/21341173598.html" target="_blank"><img src="http://farm1.static.flickr.com/612/21341173598_85cdfcd913_m.jpg" alt="" /></a><br />Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

Pyrite crystals in magnetite-quartz banded iron formation (Temagami Iron-Formation, Neoarchean, ~2.736 Ga; Temagami North roadcut, Temagami, 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/33931265468.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33931265468_70c4e4ec86_m.jpg" alt="" /></a><br />Pyrite crystals in magnetite-quartz banded iron formation (Temagami Iron-Formation, Neoarchean, ~2.736 Ga; Temagami North roadcut, Temagami, Ontario, Canada) 18 / James St. John</span>

サイズ変更など

Hull-Rust-Mahoning Mine (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Hibbing, 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/23582290272.html" target="_blank"><img src="http://farm6.static.flickr.com/5630/23582290272_c1ff7bac9c_m.jpg" alt="" /></a><br />Hull-Rust-Mahoning Mine (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Hibbing, Minnesota, USA) 3 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, 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/23714886455.html" target="_blank"><img src="http://farm1.static.flickr.com/574/23714886455_187dce07b9_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 29 / 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) 242
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50724275417.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50724275417_2804bbd42a_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) 242 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 73
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32766255827.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32766255827_0fae15926c_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 73 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 34
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23688796816.html" target="_blank"><img src="http://farm6.static.flickr.com/5767/23688796816_0524b63b83_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 34 / James St. John</span>

サイズ変更など

Banded iron formation (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, northeastern 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/23426795641.html" target="_blank"><img src="http://farm1.static.flickr.com/634/23426795641_b01801e956_m.jpg" alt="" /></a><br />Banded iron formation (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, northeastern Minnesota, USA) 2 / 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) 250
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50724267962.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50724267962_398e4006e2_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) 250 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, 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/23140875569.html" target="_blank"><img src="http://farm1.static.flickr.com/740/23140875569_341f964dce_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, 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/23400335532.html" target="_blank"><img src="http://farm6.static.flickr.com/5692/23400335532_4e95061a1c_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, Minnesota, USA) 3 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 42
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23606280522.html" target="_blank"><img src="http://farm6.static.flickr.com/5660/23606280522_bddf52ea54_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 42 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from 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/49544182301.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49544182301_08c907bcd3_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from Canada) 3 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from 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/49543681898.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49543681898_3c87b1a5fd_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from Canada) 4 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from 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/49544175311.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49544175311_82b1dd4117_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from Canada) 1 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, 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/23426372871.html" target="_blank"><img src="http://farm6.static.flickr.com/5718/23426372871_1ea1bd6462_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, Minnesota, USA) 5 / 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) 175
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069898827.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069898827_ce9a9a6a33_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) 175 / James St. John</span>

サイズ変更など

Block of jaspilite banded iron formation (BIF) in wall at base of 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/48069780576.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069780576_4e1403d37c_m.jpg" alt="" /></a><br />Block of jaspilite banded iron formation (BIF) in wall at base of Jasper Knob (Ishpeming, Michigan, USA) 2 / 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) 214
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069805576.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069805576_85a62a5d95_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) 214 / James St. John</span>

サイズ変更など

Blocks of jaspilite banded iron formation (BIF) in wall & stairsteps at base of Jasper Knob (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/48069885857.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069885857_98d3f7dacf_m.jpg" alt="" /></a><br />Blocks of jaspilite banded iron formation (BIF) in wall & stairsteps at base of Jasper Knob (Ishpeming, Michigan, USA) 1 / 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) 241
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50723453688.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50723453688_baff06e596_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) 241 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from 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/49544409292.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49544409292_22068ea61b_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Pleistocene glacial clast derived from Canada) 2 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 44
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23086669414.html" target="_blank"><img src="http://farm1.static.flickr.com/695/23086669414_8e1e8dd8ed_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 44 / James St. John</span>

サイズ変更など

Quartz-mineralized fault zone in slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, 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/30824329723.html" target="_blank"><img src="http://farm1.static.flickr.com/584/30824329723_fb75855733_m.jpg" alt="" /></a><br />Quartz-mineralized fault zone in slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Hull-Rust-Mahoning Mine (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Hibbing, 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/23608365671.html" target="_blank"><img src="http://farm6.static.flickr.com/5675/23608365671_cb5cea3b9b_m.jpg" alt="" /></a><br />Hull-Rust-Mahoning Mine (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Hibbing, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, 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/23213089800.html" target="_blank"><img src="http://farm6.static.flickr.com/5711/23213089800_96bb9bfe60_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Mountain Iron Mine, Mountain Iron, Minnesota, USA) 2 / 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) 109
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069761601.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069761601_7550316031_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) 109 / 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) 123
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069771336.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069771336_3285eb884a_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) 123 / 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) 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/48069748176.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069748176_5919e1297d_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) 101 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, 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/23688902736.html" target="_blank"><img src="http://farm6.static.flickr.com/5780/23688902736_4c0ecd3df8_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 22 / James St. John</span>

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Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, 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/23086762544.html" target="_blank"><img src="http://farm1.static.flickr.com/709/23086762544_f39d264bcc_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 32 / 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) 213
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069912137.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069912137_b03c69391c_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) 213 / 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) 107
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069812668.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069812668_14c7fbc157_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) 107 / James St. John</span>

サイズ変更など

Fault slickensides (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, 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/31518775771.html" target="_blank"><img src="http://farm1.static.flickr.com/522/31518775771_b662d28d10_m.jpg" alt="" /></a><br />Fault slickensides (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 5 / 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) 203
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069859553.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069859553_a547e80024_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) 203 / James St. John</span>

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Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 71
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/40743163883.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/40743163883_bb3f2a45a9_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 71 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Thunderbird North Mine-Auburn Mine Pit, Virginia, 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/23374374302.html" target="_blank"><img src="http://farm1.static.flickr.com/669/23374374302_8a2bee8391_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Thunderbird North Mine-Auburn Mine Pit, Virginia, Minnesota, USA) 1 / 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) 211
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069857488.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069857488_510bb236d0_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) 211 / 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) 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/48069757291.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069757291_9d91598577_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) 118 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 72
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/33832327448.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33832327448_30e0b58ae3_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 72 / James St. John</span>

サイズ変更など

Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Pillsbury Mine, Chisholm, Mesabi Iron Range, 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/23536946122.html" target="_blank"><img src="http://farm1.static.flickr.com/699/23536946122_556da7b841_m.jpg" alt="" /></a><br />Biwabik Iron-Formation (Paleoproterozoic, ~1.878 Ga; Pillsbury Mine, Chisholm, Mesabi Iron Range, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, 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/21341020300.html" target="_blank"><img src="http://farm6.static.flickr.com/5698/21341020300_083ef844f4_m.jpg" alt="" /></a><br />Specularite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; display piece in monument at Tower Train Museum, Tower, Minnesota, USA) 1 / 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) 108
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069866692.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069866692_bec0f00e7d_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) 108 / James St. John</span>

サイズ変更など

Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, 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/23086828914.html" target="_blank"><img src="http://farm6.static.flickr.com/5774/23086828914_3229c91d79_m.jpg" alt="" /></a><br />Taconite (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; roadcut in Chisholm, Minnesota, USA) 25 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, 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/47656127552.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47656127552_5eda6dcc30_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 2 / 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) 136
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069766221.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069766221_a245490160_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) 136 / 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) 119
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069806778.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069806778_45e253bccb_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) 119 / 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) 220
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069814881.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069814881_392693de75_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) 220 / James St. John</span>

サイズ変更など

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, 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/33831821878.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33831821878_7c2ff01626_m.jpg" alt="" /></a><br />Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 3 / 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) 222
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069920617.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069920617_2f6f2db8f5_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) 222 / 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) 105
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48069797823.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48069797823_1d9d978f5d_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) 105 / James St. John</span>

サイズ変更など

Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, 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/30824248003.html" target="_blank"><img src="http://farm1.static.flickr.com/159/30824248003_6ffbe51654_m.jpg" alt="" /></a><br />Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 2 / James St. John</span>

サイズ変更など

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