pyroxene

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Pumiceous orendite lamproite with xenolith (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, 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/48981571607.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48981571607_b234901e9d_m.jpg" alt="" /></a><br />Pumiceous orendite lamproite with xenolith (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1 / 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) 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/52375851845.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375851845_07edc6bf9e_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) 73 / James St. John</span>

サイズ変更など

Rainbow obsidian (Jalisco State, Mexico) 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/54545268926.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54545268926_6198d58407_m.jpg" alt="" /></a><br />Rainbow obsidian (Jalisco State, Mexico) 34 / 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) 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/47926915583.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926915583_cac9d46c51_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 17 / 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) 31
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47926978012.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926978012_0bdfb8b16b_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 31 / 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) 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/52375453401.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375453401_d3fe8af1d4_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) 75 / James St. John</span>

サイズ変更など

Napoleonite (Corsica) 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/52460629481.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52460629481_d136e568e4_m.jpg" alt="" /></a><br />Napoleonite (Corsica) 2 / 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) 33
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47926972368.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926972368_365425df93_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 33 / James St. John</span>

サイズ変更など

Matthews Hill (wyomingite lamproite volcanic center in the Leucite Hills, 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/48933817661.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48933817661_0556ae4208_m.jpg" alt="" /></a><br />Matthews Hill (wyomingite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 11 / 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) 92
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375687013.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375687013_1eaae43440_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) 92 / 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) 85
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375780639.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375780639_a118ff106d_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) 85 / James St. John</span>

サイズ変更など

Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51142326442.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51142326442_0a77e256ba_m.jpg" alt="" /></a><br />Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 5 / 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) 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/47926825262.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926825262_5c24ef2b81_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 4 / 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) 87
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52374518932.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52374518932_7ee9f3ab86_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) 87 / James St. John</span>

サイズ変更など

Spinifex komatiite sill (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 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/33965901838.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33965901838_c4b6953fd3_m.jpg" alt="" /></a><br />Spinifex komatiite sill (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 45 / 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) 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/8359855310.html" target="_blank"><img src="http://farm9.static.flickr.com/8220/8359855310_39dfc3e648_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 8 / James St. John</span>

サイズ変更など

Wyomingitic volcanic breccia (Lower Pleistocene, 2.19-2.56 Ma; Boar's Tusk, Leucite Hills, Wyoming, USA) 39
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48944372586.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48944372586_c97e1d1e65_m.jpg" alt="" /></a><br />Wyomingitic volcanic breccia (Lower Pleistocene, 2.19-2.56 Ma; Boar's Tusk, Leucite Hills, Wyoming, USA) 39 / 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) 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/8359855454.html" target="_blank"><img src="http://farm9.static.flickr.com/8080/8359855454_854575b960_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 7 / James St. John</span>

サイズ変更など

Spotted anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, 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/51143315166.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51143315166_4fb2c53a30_m.jpg" alt="" /></a><br />Spotted anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) / 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) 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/8359855614.html" target="_blank"><img src="http://farm9.static.flickr.com/8465/8359855614_7274fa7ce4_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 6 / James St. John</span>

サイズ変更など

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, 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/48981590872.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48981590872_f9d500710c_m.jpg" alt="" /></a><br />Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 14 / 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) 12
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8359854666.html" target="_blank"><img src="http://farm9.static.flickr.com/8325/8359854666_4731a7ce27_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 12 / James St. John</span>

サイズ変更など

Yooperlite (sodalite syenite) (Lake Superior shoreline, Upper Peninsula of Michigan, 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/52949034164.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52949034164_72f808f068_m.jpg" alt="" /></a><br />Yooperlite (sodalite syenite) (Lake Superior shoreline, Upper Peninsula of Michigan, USA) 3 / James St. John</span>

サイズ変更など

Boar's Tusk (Early Pleistocene wyomingite volcanic center in the Leucite Hills, Wyoming, 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/48940223366.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48940223366_120b24f942_m.jpg" alt="" /></a><br />Boar's Tusk (Early Pleistocene wyomingite volcanic center in the Leucite Hills, Wyoming, USA) 10 / 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) 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/47926907132.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926907132_2e473e8a46_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 18 / 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) 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/52771548304.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52771548304_4343bb134d_m.jpg" alt="" /></a><br />Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 15 / 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) 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/47926823093.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926823093_58c47216be_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 3 / 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) 81
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375762574.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375762574_3537009fdf_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) 81 / James St. John</span>

サイズ変更など

Rainbow obsidian (Jalisco State, Mexico) 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/54545496923.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54545496923_0703f4b695_m.jpg" alt="" /></a><br />Rainbow obsidian (Jalisco State, Mexico) 32 / 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) 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/47926813297.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926813297_31e5580e86_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 5 / 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) 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/52374487772.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52374487772_ab0fb621a4_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) 72 / James St. John</span>

サイズ変更など

Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, Wyoming, 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/31894248746.html" target="_blank"><img src="http://farm1.static.flickr.com/349/31894248746_ac138233b8_m.jpg" alt="" /></a><br />Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) 3 / James St. John</span>

サイズ変更など

Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, 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/24922426068.html" target="_blank"><img src="http://farm5.static.flickr.com/4565/24922426068_7ba584e128_m.jpg" alt="" /></a><br />Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 15 / James St. John</span>

サイズ変更など

Sybille Canyon (Laramie Range, Wyoming, 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/50419464666.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50419464666_c66bc520c0_m.jpg" alt="" /></a><br />Sybille Canyon (Laramie Range, Wyoming, USA) 3 / 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) 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/47926903002.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926903002_f32f682754_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 19 / 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) 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/47926866932.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926866932_257b638e94_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 27 / 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) 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/47926861411.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926861411_a00b31a9fe_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 29 / James St. John</span>

サイズ変更など

Boar's Tusk (Early Pleistocene wyomingite volcanic center in the Leucite Hills, Wyoming, 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/48940364571.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48940364571_63deaffde4_m.jpg" alt="" /></a><br />Boar's Tusk (Early Pleistocene wyomingite volcanic center in the Leucite Hills, Wyoming, USA) 20 / 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) 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/47926917427.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926917427_d2fd626696_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 16 / James St. John</span>

サイズ変更など

Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 57
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48965806687.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48965806687_a9891ef0e7_m.jpg" alt="" /></a><br />Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 57 / 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) 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/8358792559.html" target="_blank"><img src="http://farm9.static.flickr.com/8371/8358792559_50c4d1f753_m.jpg" alt="" /></a><br />Minette dike & volcanic neck (Oligocene, 27-32 Ma; Ship Rock & southern dike, Navajo Volcanic Field, New Mexico, USA) 1 / James St. John</span>

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Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, 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/52364491322.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52364491322_b58b8db767_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) 25 / James St. John</span>

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Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 66
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375437946.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375437946_f7c09dd18e_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) 66 / 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) 90
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52374517277.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52374517277_765c1aafe1_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) 90 / James St. John</span>

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Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 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/47926930071.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926930071_d99b88ed7b_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 30 / James St. John</span>

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Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 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/33995592858.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33995592858_460b017f86_m.jpg" alt="" /></a><br />Polymetallic massive sulfide (Middle Tholeiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711 to 2.719 Ga; drill core at the Potter Mine, east of Timmins, Ontario, Canada) 10 / James St. John</span>

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Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 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/48963842343.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48963842343_77944fc15a_m.jpg" alt="" /></a><br />Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 41 / James St. John</span>

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Old chromite mine (Beartooth Plateau, 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/52575102988.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52575102988_9d27250788_m.jpg" alt="" /></a><br />Old chromite mine (Beartooth Plateau, Montana, USA) 8 / James St. John</span>

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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) 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/33951331668.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33951331668_4bfed6f1f9_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) 23 / James St. John</span>

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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) 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/32898418637.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/32898418637_afb5723ba5_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) 14 / James St. John</span>

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Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 31
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/33950925458.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/33950925458_95f7a360be_m.jpg" alt="" /></a><br />Metakomatiite lava flows (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.719 Ga; Pyke Hill, near the Potter Mine, east of Timmins, Ontario, Canada) 31 / James St. John</span>

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Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, 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/53553115215.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53553115215_e60eb941cd_m.jpg" alt="" /></a><br />Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, USA) 9 / James St. John</span>

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Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, 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/51144108130.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51144108130_f49b785d7a_m.jpg" alt="" /></a><br />Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 2 / James St. John</span>

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Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 12
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48981595612.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48981595612_62a413edf9_m.jpg" alt="" /></a><br />Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 12 / James St. John</span>

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Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 55
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48965085583.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48965085583_eafca1f0c7_m.jpg" alt="" /></a><br />Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 55 / 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) 86
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52375690118.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52375690118_c79a2dd15c_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) 86 / James St. John</span>

サイズ変更など

Orendite lamproite with xenolith (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, 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/48980737568.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48980737568_ae4b61349b_m.jpg" alt="" /></a><br />Orendite lamproite with xenolith (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 10 / James St. John</span>

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Partially devitrified rhyolitic obsidian with lithophysae (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, 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/45893933205.html" target="_blank"><img src="http://farm8.static.flickr.com/7883/45893933205_86e103feb3_m.jpg" alt="" /></a><br />Partially devitrified rhyolitic obsidian with lithophysae (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 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) 58
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52372085056.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52372085056_684343977e_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) 58 / James St. John</span>

サイズ変更など

Napoleonite (Corsica) 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/52460890114.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52460890114_a343c82051_m.jpg" alt="" /></a><br />Napoleonite (Corsica) 3 / James St. John</span>

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