magma

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Moro Rock exfoliation dome (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Sequoia National Park, California, 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/16799536675.html" target="_blank"><img src="http://farm9.static.flickr.com/8727/16799536675_bf8b177297_m.jpg" alt="" /></a><br />Moro Rock exfoliation dome (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Sequoia National Park, California, USA) 7 / James St. John</span>

サイズ変更など

Basalt lava flow eruption (4 August 2022) (Meradalir Valley, near Fagradalsfjall Volcano, Iceland) 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/52263433733.html" target="_blank"><img src="http://farm0.static.flickr.com/0/52263433733_c70ccf6271_m.jpg" alt="" /></a><br />Basalt lava flow eruption (4 August 2022) (Meradalir Valley, near Fagradalsfjall Volcano, Iceland) 7 / James St. John</span>

サイズ変更など

Tourmaline in pegmatitic granite 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/26934247769.html" target="_blank"><img src="http://farm5.static.flickr.com/4519/26934247769_552749f778_m.jpg" alt="" /></a><br />Tourmaline in pegmatitic granite 1 / James St. John</span>

サイズ変更など

Garnet schist (Late Cretaceous, 89-90 Ma; Garnet Ledge, about 12 km north of Wrangell, southeastern Alaska, 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/49072979426.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49072979426_aa2cc9f120_m.jpg" alt="" /></a><br />Garnet schist (Late Cretaceous, 89-90 Ma; Garnet Ledge, about 12 km north of Wrangell, southeastern Alaska, USA) 9 / James St. John</span>

サイズ変更など

Orbicular monzodiorite (eastern Davie County, North Carolina, 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/15755434099.html" target="_blank"><img src="http://farm8.static.flickr.com/7485/15755434099_b176f77f22_m.jpg" alt="" /></a><br />Orbicular monzodiorite (eastern Davie County, North Carolina, USA) 3 / James St. John</span>

サイズ変更など

Large potassium feldspar & quartz crystals in pegmatitic granite (Ruggles Pegmatite, Devonian; Ruggles Pegmatite Mine, New Hampshire, 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/8290570829.html" target="_blank"><img src="http://farm9.static.flickr.com/8072/8290570829_dcd83c0ef7_m.jpg" alt="" /></a><br />Large potassium feldspar & quartz crystals in pegmatitic granite (Ruggles Pegmatite, Devonian; Ruggles Pegmatite Mine, New Hampshire, USA) 1 / James St. John</span>

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Moonstone (iridescent peristerite-oligoclase feldspar) (Chupa Pegmatite Field, Mesoproterozoic, 1.75 to 2.10 Ga; at or near Chupa Bay, Karelia, Russia) 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/14936848270.html" target="_blank"><img src="http://farm4.static.flickr.com/3884/14936848270_ea27e11dca_m.jpg" alt="" /></a><br />Moonstone (iridescent peristerite-oligoclase feldspar) (Chupa Pegmatite Field, Mesoproterozoic, 1.75 to 2.10 Ga; at or near Chupa Bay, Karelia, Russia) 2 / James St. John</span>

サイズ変更など

Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 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/15023326311.html" target="_blank"><img src="http://farm6.static.flickr.com/5573/15023326311_0cb9bccfc1_m.jpg" alt="" /></a><br />Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 3 / James St. John</span>

サイズ変更など

Kīlauea Iki, Hawaiʻi Volcanoes National Park, Hawaii
by Ken Lund

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/4529419666.html" target="_blank"><img src="http://farm5.static.flickr.com/4019/4529419666_a77033285d_m.jpg" alt="" /></a><br />Kīlauea Iki, Hawaiʻi Volcanoes National Park, Hawaii / Ken Lund</span>

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Spatter cones erupting basalt lava (13 April 2021) (Geldingadalur Valley, Iceland) 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/51116807945.html" target="_blank"><img src="http://farm0.static.flickr.com/0/51116807945_cdfefc773d_m.jpg" alt="" /></a><br />Spatter cones erupting basalt lava (13 April 2021) (Geldingadalur Valley, Iceland) 2 / James St. John</span>

サイズ変更など

Metaconglomerate ("Marinace Red Granite") (Precambrian; Brazil)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16392697034.html" target="_blank"><img src="http://farm9.static.flickr.com/8717/16392697034_5e3944a9f6_m.jpg" alt="" /></a><br />Metaconglomerate ("Marinace Red Granite") (Precambrian; Brazil) / James St. John</span>

サイズ変更など

Novaculite (metachert) (Arkansas Novaculite, Devonian to Mississippian; Arkansas, 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/39081055045.html" target="_blank"><img src="http://farm5.static.flickr.com/4678/39081055045_f94fcf0d8b_m.jpg" alt="" /></a><br />Novaculite (metachert) (Arkansas Novaculite, Devonian to Mississippian; Arkansas, USA) 2 / James St. John</span>

サイズ変更など

Orbicular monzodiorite (eastern Davie County, North Carolina, 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/15754035148.html" target="_blank"><img src="http://farm8.static.flickr.com/7481/15754035148_b66ef9d072_m.jpg" alt="" /></a><br />Orbicular monzodiorite (eastern Davie County, North Carolina, USA) 4 / James St. John</span>

サイズ変更など

Martin Diamond Processing Plant (Crater of Diamonds, Pike County, Arkansas, 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/51735570295.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51735570295_c810829585_m.jpg" alt="" /></a><br />Martin Diamond Processing Plant (Crater of Diamonds, Pike County, Arkansas, USA) / James St. John</span>

サイズ変更など

Serpentinite (East Dover Ultramafic Body, Ordovician; Adams Brook, east of East Dover, Vermont, USA) 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/50503836388.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50503836388_102ba42b8c_m.jpg" alt="" /></a><br />Serpentinite (East Dover Ultramafic Body, Ordovician; Adams Brook, east of East Dover, Vermont, USA) 17 / James St. John</span>

サイズ変更など

Granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, Sequoia National Park, California, 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/16611992558.html" target="_blank"><img src="http://farm9.static.flickr.com/8711/16611992558_ff4e9840ab_m.jpg" alt="" /></a><br />Granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, Sequoia National Park, California, USA) 8 / James St. John</span>

サイズ変更など

Chain of Craters WSA
by mypubliclands

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/9441251233.html" target="_blank"><img src="http://farm4.static.flickr.com/3667/9441251233_ee654bed17_m.jpg" alt="" /></a><br />Chain of Craters WSA / mypubliclands</span>

サイズ変更など

Basaltic lava flow eruption (daytime, 25 March 2021) (Geldingadalur Valley, Iceland) 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/51071289407.html" target="_blank"><img src="http://farm0.static.flickr.com/0/51071289407_8b1e8ed027_m.jpg" alt="" /></a><br />Basaltic lava flow eruption (daytime, 25 March 2021) (Geldingadalur Valley, Iceland) 4 / James St. John</span>

サイズ変更など

State Route 19 Across the 1801 Huʻehuʻe flow from Hualālai, Hawaii
by Ken Lund

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/4527304769.html" target="_blank"><img src="http://farm5.static.flickr.com/4034/4527304769_eaa042be6c_m.jpg" alt="" /></a><br />State Route 19 Across the 1801 Huʻehuʻe flow from Hualālai, Hawaii / Ken Lund</span>

サイズ変更など

Octahedrite (Sikhote-Alin Meteorite) 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/29590505330.html" target="_blank"><img src="http://farm9.static.flickr.com/8398/29590505330_67c786c29f_m.jpg" alt="" /></a><br />Octahedrite (Sikhote-Alin Meteorite) 2 / James St. John</span>

サイズ変更など

Andesitic ash (February 2006 ash eruption from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14839895157.html" target="_blank"><img src="http://farm6.static.flickr.com/5574/14839895157_81e5bb700f_m.jpg" alt="" /></a><br />Andesitic ash (February 2006 ash eruption from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) / James St. John</span>

サイズ変更など

Basaltic lava flow eruption (daytime, 24 March 2021) (Geldingadalur Valley, Iceland) 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/51069249972.html" target="_blank"><img src="http://farm0.static.flickr.com/0/51069249972_bdf2a3efd6_m.jpg" alt="" /></a><br />Basaltic lava flow eruption (daytime, 24 March 2021) (Geldingadalur Valley, Iceland) 1 / James St. John</span>

サイズ変更など

Emeralds in pegmatitic granite 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/26934246279.html" target="_blank"><img src="http://farm5.static.flickr.com/4569/26934246279_19d9f53599_m.jpg" alt="" /></a><br />Emeralds in pegmatitic granite 5 / James St. John</span>

サイズ変更など

Hanging Rock near Mt Macedon. An old volcanic plug. Used for Peter Weir's film Picnic at Hanging Rock.
by denisbin

クリエイティブ・コモンズ表示-改変禁止 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/25286075503.html" target="_blank"><img src="http://farm2.static.flickr.com/1477/25286075503_7ba2a9c2a7_m.jpg" alt="" /></a><br />Hanging Rock near Mt Macedon. An old volcanic plug. Used for Peter Weir's film Picnic at Hanging Rock. / denisbin</span>

サイズ変更など

Molybdenite in quartz-rich pegmatitic granite (Abitibi Greenstone Belt, Precambrian; Moly Hill Mine, Quebec, Canada) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/19236032102.html" target="_blank"><img src="http://farm1.static.flickr.com/452/19236032102_de4d526ab5_m.jpg" alt="" /></a><br />Molybdenite in quartz-rich pegmatitic granite (Abitibi Greenstone Belt, Precambrian; Moly Hill Mine, Quebec, Canada) 2 / James St. John</span>

サイズ変更など

Metachert (Arkansas Novaculite, Devonian-Mississippian; ZigZag Mountains, Arkansas, 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/51725847379.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51725847379_4f54c34547_m.jpg" alt="" /></a><br />Metachert (Arkansas Novaculite, Devonian-Mississippian; ZigZag Mountains, Arkansas, USA) 13 / James St. John</span>

サイズ変更など

Fountain Paintpots (3 June 2014) (HD)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15874661163.html" target="_blank"><img src="http://farm8.static.flickr.com/7311/15874661163_b9111b17a1_m.jpg" alt="" /></a><br />Fountain Paintpots (3 June 2014) (HD) / James St. John</span>

サイズ変更など

Obsidian 16
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49056924706.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49056924706_cbdd683dc8_m.jpg" alt="" /></a><br />Obsidian 16 / James St. John</span>

サイズ変更など

Diamondiferous lamproite rocks (Prairie Creek Lamproite, Early Cretaceous, 106 Ma; Crater of Diamonds, Pike County, Arkansas, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51735537750.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51735537750_217355537e_m.jpg" alt="" /></a><br />Diamondiferous lamproite rocks (Prairie Creek Lamproite, Early Cretaceous, 106 Ma; Crater of Diamonds, Pike County, Arkansas, USA) 6 / James St. John</span>

サイズ変更など

Perspektivischer Blick auf die Übergangszone von Margaritifer Terra in Aurorae Chaos
by DLR_de

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48136916358.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48136916358_431425450c_m.jpg" alt="" /></a><br />Perspektivischer Blick auf die Übergangszone von Margaritifer Terra in Aurorae Chaos / DLR_de</span>

サイズ変更など

Garnets and tourmaline in pegmatitic granite (Crabtree Pegmatite, Devonian; Crabtree Mountain, Mitchell County, North Carolina, 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/27237621539.html" target="_blank"><img src="http://farm5.static.flickr.com/4586/27237621539_d672985279_m.jpg" alt="" /></a><br />Garnets and tourmaline in pegmatitic granite (Crabtree Pegmatite, Devonian; Crabtree Mountain, Mitchell County, North Carolina, USA) 2 / James St. John</span>

サイズ変更など

Serpentinite quarry (Vermont Verde Antique International Quarry, northeast of Rochester, Vermont, USA) 19
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49655103068.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49655103068_b857295ec8_m.jpg" alt="" /></a><br />Serpentinite quarry (Vermont Verde Antique International Quarry, northeast of Rochester, Vermont, USA) 19 / James St. John</span>

サイズ変更など

Octahedrite (Brenham Meteorite) (Kiowa County, Kansas, 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/33203170518.html" target="_blank"><img src="http://farm8.static.flickr.com/7912/33203170518_0a84976822_m.jpg" alt="" /></a><br />Octahedrite (Brenham Meteorite) (Kiowa County, Kansas, USA) 1 / James St. John</span>

サイズ変更など

Moro Rock exfoliation dome (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Sequoia National Park, California, 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/16611973178.html" target="_blank"><img src="http://farm8.static.flickr.com/7595/16611973178_2414461b28_m.jpg" alt="" /></a><br />Moro Rock exfoliation dome (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Sequoia National Park, California, USA) 6 / James St. John</span>

サイズ変更など

Eyjafjallajökull eruption
by Gunnar Ries zwo

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/4464619141.html" target="_blank"><img src="http://farm5.static.flickr.com/4059/4464619141_8549197dbd_m.jpg" alt="" /></a><br />Eyjafjallajökull eruption / Gunnar Ries zwo</span>

サイズ変更など

Spinel (Mogok Metamorphic Belt, Jurassic to Miocene; Momeik Township, Shan State, Burma)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50731993928.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50731993928_1ccc725ff9_m.jpg" alt="" /></a><br />Spinel (Mogok Metamorphic Belt, Jurassic to Miocene; Momeik Township, Shan State, Burma) / James St. John</span>

サイズ変更など

Diamondiferous lamproite rocks (Prairie Creek Lamproite, Early Cretaceous, 106 Ma; Crater of Diamonds, Pike County, Arkansas, 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/51735295964.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51735295964_c829349f41_m.jpg" alt="" /></a><br />Diamondiferous lamproite rocks (Prairie Creek Lamproite, Early Cretaceous, 106 Ma; Crater of Diamonds, Pike County, Arkansas, USA) 4 / James St. John</span>

サイズ変更など

Calciocarbonatite (sövite) (Oka Carbonatite Complex, Early Cretaceous, 124-125 Ma; Oka Niobium Mine, Quebec, 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/14635942149.html" target="_blank"><img src="http://farm6.static.flickr.com/5589/14635942149_cb63a235e2_m.jpg" alt="" /></a><br />Calciocarbonatite (sövite) (Oka Carbonatite Complex, Early Cretaceous, 124-125 Ma; Oka Niobium Mine, Quebec, Canada) 3 / James St. John</span>

サイズ変更など

Mono-Inyo Craters
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/48848519086.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48848519086_64630aa97b_m.jpg" alt="" /></a><br />Mono-Inyo Craters / RuggyBearLA</span>

サイズ変更など

Fountain Paintpots (17 August 2014) (HD)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16496094635.html" target="_blank"><img src="http://farm8.static.flickr.com/7422/16496094635_d14b13c5a3_m.jpg" alt="" /></a><br />Fountain Paintpots (17 August 2014) (HD) / James St. John</span>

サイズ変更など

Emeralds in pegmatitic granite 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/37822316315.html" target="_blank"><img src="http://farm5.static.flickr.com/4551/37822316315_441fcda145_m.jpg" alt="" /></a><br />Emeralds in pegmatitic granite 7 / James St. John</span>

サイズ変更など

Fountain Paint Pots (5 August 2013) 24
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/12226021586.html" target="_blank"><img src="http://farm3.static.flickr.com/2828/12226021586_1c23170ffc_m.jpg" alt="" /></a><br />Fountain Paint Pots (5 August 2013) 24 / James St. John</span>

サイズ変更など

Octahedrite (Cape York Meteorite)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/5867516523.html" target="_blank"><img src="http://farm6.static.flickr.com/5032/5867516523_392117e813_m.jpg" alt="" /></a><br />Octahedrite (Cape York Meteorite) / James St. John</span>

サイズ変更など

Basalt 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/48674617291.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48674617291_f6d93695ea_m.jpg" alt="" /></a><br />Basalt 8 / James St. John</span>

サイズ変更など

Dikes intruding tillite (Nipissing Diabase & Gowganda Formation, Paleoproterozoic; Percival Lake roadcut, Ontario, Canada) 24
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47728213741.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47728213741_3741d143de_m.jpg" alt="" /></a><br />Dikes intruding tillite (Nipissing Diabase & Gowganda Formation, Paleoproterozoic; Percival Lake roadcut, Ontario, Canada) 24 / James St. John</span>

サイズ変更など

Basaltic lava (late March 2021 eruption in Geldingadalur Valley, Rekjanes Peninsula, Iceland) 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/51094164010.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51094164010_fd863a1c57_m.jpg" alt="" /></a><br />Basaltic lava (late March 2021 eruption in Geldingadalur Valley, Rekjanes Peninsula, Iceland) 1 / James St. John</span>

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Tourmaline-feldspar-quartz (Erongo Granite, Early Cretaceous, 144 Ma; Lions Head, Erongo Mountains, Namibia) 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/25987991522.html" target="_blank"><img src="http://farm2.static.flickr.com/1467/25987991522_9c792a0534_m.jpg" alt="" /></a><br />Tourmaline-feldspar-quartz (Erongo Granite, Early Cretaceous, 144 Ma; Lions Head, Erongo Mountains, Namibia) 2 / James St. John</span>

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Rhyolitic vitrophyre (Banco Bonito Obsidian, Upper Pleistocene, 50-55 ka; Three Rhyolites Roadcut, Rt. 4, southern margin of Valles Caldera, northern New Mexico, 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/15034501931.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/15034501931_2e5c7ab994_m.jpg" alt="" /></a><br />Rhyolitic vitrophyre (Banco Bonito Obsidian, Upper Pleistocene, 50-55 ka; Three Rhyolites Roadcut, Rt. 4, southern margin of Valles Caldera, northern New Mexico, USA) / James St. John</span>

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Illustration of carbon dioxide and nonvolatile trace element behavior in magmas at oceanic volcanoes.
by deepcarbonobservatory

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49013382652.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49013382652_ffae35436e_m.jpg" alt="" /></a><br />Illustration of carbon dioxide and nonvolatile trace element behavior in magmas at oceanic volcanoes. / deepcarbonobservatory</span>

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Fountain Paintpots (8 July 2014) (HD)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/16494966092.html" target="_blank"><img src="http://farm9.static.flickr.com/8659/16494966092_8577f98a8c_m.jpg" alt="" /></a><br />Fountain Paintpots (8 July 2014) (HD) / James St. John</span>

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Ijolite (Oka Carbonatite Complex, Early Cretaceous, 124-125 Ma; Oka Niobium Mine, Quebec, Canada)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14822252052.html" target="_blank"><img src="http://farm6.static.flickr.com/5574/14822252052_41425d8886_m.jpg" alt="" /></a><br />Ijolite (Oka Carbonatite Complex, Early Cretaceous, 124-125 Ma; Oka Niobium Mine, Quebec, Canada) / James St. John</span>

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Basalt 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/48674275908.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48674275908_26462d886b_m.jpg" alt="" /></a><br />Basalt 5 / James St. John</span>

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Snowflake obsidian 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/52812581666.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52812581666_bd6f7f07f3_m.jpg" alt="" /></a><br />Snowflake obsidian 10 / James St. John</span>

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Serpentinite 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/45536947255.html" target="_blank"><img src="http://farm5.static.flickr.com/4846/45536947255_fc337540f3_m.jpg" alt="" /></a><br />Serpentinite 2 / James St. John</span>

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Kīlauea Iki, Hawaiʻi Volcanoes National Park, Hawaii
by Ken Lund

クリエイティブ・コモンズ表示-継承 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/4529408620.html" target="_blank"><img src="http://farm5.static.flickr.com/4012/4529408620_ae7f4afeec_m.jpg" alt="" /></a><br />Kīlauea Iki, Hawaiʻi Volcanoes National Park, Hawaii / Ken Lund</span>

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Basaltic lava flow eruption (early morning, 22 March 2021) (Geldingadalur Valley, Iceland) 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/51061979696.html" target="_blank"><img src="http://farm0.static.flickr.com/0/51061979696_7215f9f2d2_m.jpg" alt="" /></a><br />Basaltic lava flow eruption (early morning, 22 March 2021) (Geldingadalur Valley, Iceland) 2 / James St. John</span>

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Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern 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/23316431125.html" target="_blank"><img src="http://farm6.static.flickr.com/5760/23316431125_3a75a8b1e2_m.jpg" alt="" /></a><br />Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, USA) 11 / James St. John</span>

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Chain of Craters WSA
by mypubliclands

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/9441257011.html" target="_blank"><img src="http://farm8.static.flickr.com/7342/9441257011_3591041d6f_m.jpg" alt="" /></a><br />Chain of Craters WSA / mypubliclands</span>

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#mypubliclandsroadtrip 2016: On the Way To, Idaho Henry's Lake and Menan Buttes
by mypubliclands

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/28054508524.html" target="_blank"><img src="http://farm8.static.flickr.com/7662/28054508524_bb5059ff7b_m.jpg" alt="" /></a><br />#mypubliclandsroadtrip 2016: On the Way To, Idaho Henry's Lake and Menan Buttes / mypubliclands</span>

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Bronzitic anorthosite (Stillwater Complex, Neoarchean, 2.71 Ga; mine core dump, Stillwater Mine, 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/31406471795.html" target="_blank"><img src="http://farm6.static.flickr.com/5816/31406471795_5249156b4e_m.jpg" alt="" /></a><br />Bronzitic anorthosite (Stillwater Complex, Neoarchean, 2.71 Ga; mine core dump, Stillwater Mine, Beartooth Mountains, Montana, USA) 2 / James St. John</span>

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