pyroxene

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Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 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/46084659804.html" target="_blank"><img src="http://farm5.static.flickr.com/4856/46084659804_1891af21f1_m.jpg" alt="" /></a><br />Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 14 / James St. John</span>

サイズ変更など

Llao Rock (Crater Lake Caldera, Oregon, 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/27135641717.html" target="_blank"><img src="http://farm1.static.flickr.com/979/27135641717_f2c6518b50_m.jpg" alt="" /></a><br />Llao Rock (Crater Lake Caldera, Oregon, USA) 8 / James St. John</span>

サイズ変更など

Anorthosite with labradorite (Wiborg Batholith, 1633 Ma; Kymi Province, Finland) 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/50419679158.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50419679158_8026b0f6a4_m.jpg" alt="" /></a><br />Anorthosite with labradorite (Wiborg Batholith, 1633 Ma; Kymi Province, Finland) 8 / James St. John</span>

サイズ変更など

Minette dike & volcanic neck (Oligocene, 27-32 Ma; Ship Rock & southern dike, Navajo Volcanic Field, New Mexico, 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/8359856820.html" target="_blank"><img src="http://farm9.static.flickr.com/8072/8359856820_a671565962_m.jpg" alt="" /></a><br />Minette dike & volcanic neck (Oligocene, 27-32 Ma; Ship Rock & southern dike, Navajo Volcanic Field, New Mexico, USA) 2 / James St. John</span>

サイズ変更など

Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, 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/51020846873.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51020846873_4806a995b8_m.jpg" alt="" /></a><br />Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 11 / James St. John</span>

サイズ変更など

Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 61
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47832428191.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47832428191_0c6f64df75_m.jpg" alt="" /></a><br />Metakomatiite lava flow (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 61 / James St. John</span>

サイズ変更など

Olivine-bearing anthill sediments (Black Rock, Leucite Hills, Wyoming, 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/48984122552.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48984122552_115089193e_m.jpg" alt="" /></a><br />Olivine-bearing anthill sediments (Black Rock, Leucite Hills, Wyoming, USA) 6 / James St. John</span>

サイズ変更など

Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 15
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/39844278833.html" target="_blank"><img src="http://farm5.static.flickr.com/4807/39844278833_a67310a39c_m.jpg" alt="" /></a><br />Aphyric & partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 15 / James St. John</span>

サイズ変更など

Bastite (apparently) (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, 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/52575020369.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52575020369_40db7274ed_m.jpg" alt="" /></a><br />Bastite (apparently) (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, Montana, USA) 8 / 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) 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/52365873040.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52365873040_04efbc89ac_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) 43 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50421499476.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421499476_313d3a526b_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 6 / James St. John</span>

サイズ変更など

Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, 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/49895888942.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49895888942_b6cc77f1ee_m.jpg" alt="" /></a><br />Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, USA) 4 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, 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/52686769774.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52686769774_28eab61776_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 23 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 20
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52686985543.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52686985543_cd4130edf2_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 20 / 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) 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/52364514252.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52364514252_62811dc8aa_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) 44 / James St. John</span>

サイズ変更など

Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, 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/22238422811.html" target="_blank"><img src="http://farm1.static.flickr.com/665/22238422811_07b82a92c9_m.jpg" alt="" /></a><br />Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, 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/52771290656.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52771290656_0440ae26c7_m.jpg" alt="" /></a><br />Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 19 / James St. John</span>

サイズ変更など

Diabase (Somerville, Massachusetts, 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/52151536972.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52151536972_81b958a141_m.jpg" alt="" /></a><br />Diabase (Somerville, Massachusetts, USA) 1 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, 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/52685972092.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52685972092_1cfda73a12_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 17 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50421496676.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421496676_3d078424bc_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 8 / James St. John</span>

サイズ変更など

Volga Blue Granite (anorthosite) (Volodarsk-Volhynsky Intrusion, Korosten Complex, Paleoproterozoic, 1.758-1.760 Ga; Zhitomir Province, Ukraine) 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/33882336412.html" target="_blank"><img src="http://farm3.static.flickr.com/2920/33882336412_294e674f05_m.jpg" alt="" /></a><br />Volga Blue Granite (anorthosite) (Volodarsk-Volhynsky Intrusion, Korosten Complex, Paleoproterozoic, 1.758-1.760 Ga; Zhitomir Province, Ukraine) 4 / James St. John</span>

サイズ変更など

Layered gabbros (troctolitic series, Duluth Complex, Mesoproterozoic, 1099 Ma; Thomson Hill Information Center Outcrop, Skyline Parkway, Duluth, 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/21453580068.html" target="_blank"><img src="http://farm1.static.flickr.com/593/21453580068_4916cb96f3_m.jpg" alt="" /></a><br />Layered gabbros (troctolitic series, Duluth Complex, Mesoproterozoic, 1099 Ma; Thomson Hill Information Center Outcrop, Skyline Parkway, Duluth, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 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/52686489316.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52686489316_1d43eb5013_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 18 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, 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/52686914905.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52686914905_8dc26b6f3f_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 21 / James St. John</span>

サイズ変更など

Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 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/47926998468.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926998468_c4377fd21c_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 45 / James St. John</span>

サイズ変更など

Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 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/49992029933.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49992029933_235144e624_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 24 / 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) 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/32899341527.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32899341527_8dd5cf26e3_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) 43 / 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) 106
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52377923739.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52377923739_ff8c73fef8_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) 106 / James St. John</span>

サイズ変更など

Basalt lava flow (Upper Pleistocene, ~58-100 ka; north of Soda Springs, Blackfoot Lava Field, Idaho, 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/49413006056.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49413006056_c8c2c69390_m.jpg" alt="" /></a><br />Basalt lava flow (Upper Pleistocene, ~58-100 ka; north of Soda Springs, Blackfoot Lava Field, Idaho, USA) 2 / James St. John</span>

サイズ変更など

Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, 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/31875658407.html" target="_blank"><img src="http://farm8.static.flickr.com/7918/31875658407_8ee2b5299c_m.jpg" alt="" /></a><br />Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, USA) 7 / 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) 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/52365759909.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52365759909_42df9b3b30_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) 42 / 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) 41
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/46916218895.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/46916218895_8764550d96_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) 41 / James St. John</span>

サイズ変更など

Aphyric rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, 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/32933836788.html" target="_blank"><img src="http://farm8.static.flickr.com/7810/32933836788_5be2b9bec2_m.jpg" alt="" /></a><br />Aphyric rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 4 / James St. John</span>

サイズ変更など

Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 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/51023509338.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51023509338_8ae18828d8_m.jpg" alt="" /></a><br />Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 2 / James St. John</span>

サイズ変更など

Triodia sp. (spinifex grass) (Pichi Richi Pass, South Flinders Ranges, South Australia) 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/49942470772.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49942470772_71367d374d_m.jpg" alt="" /></a><br />Triodia sp. (spinifex grass) (Pichi Richi Pass, South Flinders Ranges, South Australia) 1 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50421497871.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421497871_a1f3e58c8d_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 7 / James St. John</span>

サイズ変更など

Anorthosite (Lac St. Jean Anorthosite Complex, Mesoproterozoic, 1140-1157 Ma; Lake St-Jean, 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/50421786192.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421786192_1a508017c2_m.jpg" alt="" /></a><br />Anorthosite (Lac St. Jean Anorthosite Complex, Mesoproterozoic, 1140-1157 Ma; Lake St-Jean, Quebec, Canada) 3 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50421501271.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421501271_f05c334848_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 5 / James St. John</span>

サイズ変更など

Bastite (apparently) (Neoarchean; Red Lodge Chromite District, 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/52574721511.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52574721511_fb1dbebfc7_m.jpg" alt="" /></a><br />Bastite (apparently) (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, Montana, USA) 7 / James St. John</span>

サイズ変更など

Llao Rock (Crater Lake Caldera, Oregon, 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/28154347508.html" target="_blank"><img src="http://farm1.static.flickr.com/966/28154347508_cefba4f591_m.jpg" alt="" /></a><br />Llao Rock (Crater Lake Caldera, Oregon, USA) 22 / James St. John</span>

サイズ変更など

Partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 15
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32933796238.html" target="_blank"><img src="http://farm5.static.flickr.com/4816/32933796238_190d03c020_m.jpg" alt="" /></a><br />Partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 15 / James St. John</span>

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Reverse fault in inch-scale layered plagioclase feldspar & pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52377896383.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52377896383_8944c3327f_m.jpg" alt="" /></a><br />Reverse fault in inch-scale layered plagioclase feldspar & pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 5 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50420801723.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50420801723_0fa511efcc_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 13 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50421502906.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421502906_b1e8e459ff_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 4 / James St. John</span>

サイズ変更など

Scoriaceous basalt (near Klamath Falls, Oregon, 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/52187383302.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52187383302_8a5b03240e_m.jpg" alt="" /></a><br />Scoriaceous basalt (near Klamath Falls, Oregon, USA) / James St. John</span>

サイズ変更など

Actinolite xenolith & sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, Ontario, Canada) 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/48343254447.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48343254447_17de4f961b_m.jpg" alt="" /></a><br />Actinolite xenolith & sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, Ontario, Canada) 22 / James St. John</span>

サイズ変更など

Eclogite (Late Silurian to Early Devonian, ~400-423 Ma; Almenningen, Vestland, Norway) 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/53363443733.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53363443733_3124c3bfba_m.jpg" alt="" /></a><br />Eclogite (Late Silurian to Early Devonian, ~400-423 Ma; Almenningen, Vestland, Norway) 5 / James St. John</span>

サイズ変更など

Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, 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/49978925358.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49978925358_fb4fa74f70_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 11 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 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/52686489221.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52686489221_a0bac1673f_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 16 / 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) 61
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52372082751.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52372082751_e8e5723be7_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) 61 / James St. John</span>

サイズ変更など

Spinifex metakomatiite (modern fluvial clast) (Raccoon Creek, Granville, Ohio, 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/53870695140.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53870695140_e526d0fa58_m.jpg" alt="" /></a><br />Spinifex metakomatiite (modern fluvial clast) (Raccoon Creek, Granville, Ohio, USA) 6 / James St. John</span>

サイズ変更など

Actinolite xenolith in sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, 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/48342621891.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48342621891_1a616df395_m.jpg" alt="" /></a><br />Actinolite xenolith in sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, Ontario, Canada) 3 / James St. John</span>

サイズ変更など

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, 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/52685972137.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52685972137_12913dfede_m.jpg" alt="" /></a><br />Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 19 / James St. John</span>

サイズ変更など

Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, 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/52770761092.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52770761092_b4ebc40f00_m.jpg" alt="" /></a><br />Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 7 / James St. John</span>

サイズ変更など

Anorthosite with labradorite (Wiborg Batholith, 1633 Ma; Kymi Province, Finland) 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/50420370701.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50420370701_f01397ac87_m.jpg" alt="" /></a><br />Anorthosite with labradorite (Wiborg Batholith, 1633 Ma; Kymi Province, Finland) 7 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50420816948.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50420816948_d7098859eb_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 3 / James St. John</span>

サイズ変更など

Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, 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/8359854926.html" target="_blank"><img src="http://farm9.static.flickr.com/8498/8359854926_10b7046617_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 10 / James St. John</span>

サイズ変更など

Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, 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/48931659663.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931659663_8aab5e169d_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 21 / James St. John</span>

サイズ変更など

Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, 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/46092075524.html" target="_blank"><img src="http://farm8.static.flickr.com/7811/46092075524_43d86d8b2a_m.jpg" alt="" /></a><br />Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, USA) 6 / James St. John</span>

サイズ変更など

Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, 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/49992553011.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49992553011_70960b8dee_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 27 / James St. John</span>

サイズ変更など

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