pyroxene

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Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 11
by James St. John

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48931764997.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931764997_2f84e0c515_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 11 / 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) 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/31091318254.html" target="_blank"><img src="http://farm1.static.flickr.com/351/31091318254_d8a3e23c9f_m.jpg" alt="" /></a><br />Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) 2 / James St. John</span>

サイズ変更など

Obsidian & devitrified obsidian gravel (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/46817162451.html" target="_blank"><img src="http://farm8.static.flickr.com/7813/46817162451_105a38c7e9_m.jpg" alt="" /></a><br />Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, USA) 2 / James St. John</span>

サイズ変更など

Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 28
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51968302458.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968302458_e6ee4f4027_m.jpg" alt="" /></a><br />Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 28 / James St. John</span>

サイズ変更など

Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, 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/48931042263.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931042263_d9cf7096b2_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 9 / James St. John</span>

サイズ変更など

Anorthosite & nelsonite gravel pile (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/50419419947.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50419419947_ea8f44618b_m.jpg" alt="" /></a><br />Anorthosite & nelsonite gravel pile (Sybille Canyon, Laramie Range, Wyoming, USA) / 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) 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/49979707082.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49979707082_464ffe669b_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 8 / 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) 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/48343316237.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48343316237_7da684b92f_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) 13 / James St. John</span>

サイズ変更など

Columnar-jointed orendite lamproite lava (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, 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/48972628662.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48972628662_5c63c0fb99_m.jpg" alt="" /></a><br />Columnar-jointed orendite lamproite lava (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 16 / James St. John</span>

サイズ変更など

Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, 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/48960887368.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48960887368_e4b1869f9a_m.jpg" alt="" /></a><br />Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 8 / James St. John</span>

サイズ変更など

Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, 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/48931180318.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931180318_a1c82beb69_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 3 / James St. John</span>

サイズ変更など

Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 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/50420794808.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50420794808_56b06ffbc3_m.jpg" alt="" /></a><br />Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 1 / 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) 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/46764130282.html" target="_blank"><img src="http://farm5.static.flickr.com/4909/46764130282_513366c21d_m.jpg" alt="" /></a><br />Partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 29 / James St. John</span>

サイズ変更など

Rumurutiite (North West Africa 13518 Meteorite) (Algeria) 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/53716242397.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53716242397_503b49a854_m.jpg" alt="" /></a><br />Rumurutiite (North West Africa 13518 Meteorite) (Algeria) 5 / 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) 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/46091691894.html" target="_blank"><img src="http://farm8.static.flickr.com/7806/46091691894_68b5eac0e6_m.jpg" alt="" /></a><br />Partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 23 / 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) 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/8358790699.html" target="_blank"><img src="http://farm9.static.flickr.com/8227/8358790699_397750c845_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 9 / James St. John</span>

サイズ変更など

Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 30
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51968801950.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968801950_ccec9e2480_m.jpg" alt="" /></a><br />Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 30 / 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) 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/49979703807.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49979703807_f3f30ee0cf_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 13 / 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) 40
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23931347967.html" target="_blank"><img src="http://farm5.static.flickr.com/4546/23931347967_15f310c21f_m.jpg" alt="" /></a><br />Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 40 / 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) 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/48342719252.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48342719252_e0e218f3e3_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) 9 / James St. John</span>

サイズ変更など

Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, 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/51968540659.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968540659_b72d856a4b_m.jpg" alt="" /></a><br />Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 32 / 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) 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/8358792169.html" target="_blank"><img src="http://farm9.static.flickr.com/8096/8358792169_f9ddbfc0ee_m.jpg" alt="" /></a><br />Minette dike & volcanic neck (Oligocene, 27-32 Ma; Ship Rock & southern dike, Navajo Volcanic Field, New Mexico, USA) 4 / 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) 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/51144107875.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51144107875_32ae47f5e2_m.jpg" alt="" /></a><br />Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 1 / James St. John</span>

サイズ変更など

Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, 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/48931738722.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931738722_b78c5882f8_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 7 / 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) 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/48940367016.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48940367016_4b2a546c3e_m.jpg" alt="" /></a><br />Boar's Tusk (Early Pleistocene wyomingite volcanic center in the Leucite Hills, Wyoming, USA) 18 / James St. John</span>

サイズ変更など

Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, 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/48931173713.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931173713_ec0d892380_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 5 / James St. John</span>

サイズ変更など

Vesicular basalt with stretched vesicles (Chaffee County, Colorado, 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/52187893104.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52187893104_44e47ffde7_m.jpg" alt="" /></a><br />Vesicular basalt with stretched vesicles (Chaffee County, Colorado, USA) / James St. John</span>

サイズ変更など

Basaltic spatter 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/26557236277.html" target="_blank"><img src="http://farm1.static.flickr.com/883/26557236277_4e77eaac52_m.jpg" alt="" /></a><br />Basaltic spatter 3 / James St. John</span>

サイズ変更など

Xenolith in monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, 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/47926945627.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926945627_f8526cf744_m.jpg" alt="" /></a><br />Xenolith in monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 2 / James St. John</span>

サイズ変更など

Peridotite mantle xenolith in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, 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/51968257266.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968257266_9606cfb2b0_m.jpg" alt="" /></a><br />Peridotite mantle xenolith in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 34 / James St. John</span>

サイズ変更など

Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, 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/51968523134.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968523134_653ebe218f_m.jpg" alt="" /></a><br />Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 29 / James St. John</span>

サイズ変更など

Peridotite mantle xenolith in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 26
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51968274488.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968274488_d477e82a07_m.jpg" alt="" /></a><br />Peridotite mantle xenolith in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 26 / James St. John</span>

サイズ変更など

Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, 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/48931159403.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931159403_60a8221d1e_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 9 / James St. John</span>

サイズ変更など

Pilot Butte (Pliocene madupite lamproite volcanic center in the 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/48931756202.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931756202_aeaaffdcb5_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 14 / James St. John</span>

サイズ変更など

Gabbro with granite dike (Devonian; Hulls Cove, Mt. Desert Island, Maine, 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/50602286431.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50602286431_04e2f0873a_m.jpg" alt="" /></a><br />Gabbro with granite dike (Devonian; Hulls Cove, Mt. Desert Island, Maine, USA) 4 / 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) 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/48343269472.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48343269472_11d938ebd5_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) 20 / James St. John</span>

サイズ変更など

Xenolith in monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, 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/47926949242.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926949242_c3f73231f1_m.jpg" alt="" /></a><br />Xenolith in monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 1 / James St. John</span>

サイズ変更など

Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, 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/21265960829.html" target="_blank"><img src="http://farm1.static.flickr.com/758/21265960829_0ca2a614b0_m.jpg" alt="" /></a><br />Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 7 / James St. John</span>

サイズ変更など

Bastite (apparently) (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, Montana, 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/52575167470.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52575167470_f0e0653ea8_m.jpg" alt="" /></a><br />Bastite (apparently) (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, Montana, USA) 3 / James St. John</span>

サイズ変更など

Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, 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/51968300813.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51968300813_22e8039c7a_m.jpg" alt="" /></a><br />Peridotite mantle xenoliths in phonotephrite (Peridot Mesa Flow, Middle Pleistocene, 580 ka; Peridot Mesa, San Carlos Volcanic Field, Arizona, USA) 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) 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/47927008412.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47927008412_c5707f8ec5_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 42 / James St. John</span>

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Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, 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/49895867782.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49895867782_94246e1523_m.jpg" alt="" /></a><br />Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, USA) 15 / James St. John</span>

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Mount Hood Volcano (Cascade Range, Oregon, 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/53226226758.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/53226226758_b7953eef96_m.jpg" alt="" /></a><br />Mount Hood Volcano (Cascade Range, Oregon, USA) 10 / James St. John</span>

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Glaucophane-bearing schist (Attic-Cycladic Crystalline Complex, Cretaceous to Eocene metamorphism, 78 to 42 Ma; Siphnos Island, Aegean Sea) 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/50724266786.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50724266786_18c3e0482d_m.jpg" alt="" /></a><br />Glaucophane-bearing schist (Attic-Cycladic Crystalline Complex, Cretaceous to Eocene metamorphism, 78 to 42 Ma; Siphnos Island, Aegean Sea) 6 / James St. John</span>

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Troctolite (Laramie Anorthosite Complex, Mesoproterozoic; Sybille Pit, 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/51144444545.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51144444545_dba06c96aa_m.jpg" alt="" /></a><br />Troctolite (Laramie Anorthosite Complex, Mesoproterozoic; Sybille Pit, Laramie Range, Wyoming, USA) 2 / James St. John</span>

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Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, 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/8358790431.html" target="_blank"><img src="http://farm9.static.flickr.com/8334/8358790431_5da1f87cc0_m.jpg" alt="" /></a><br />Minette dike (Oligocene, 27-32 Ma; Ship Rock's southern dike, Navajo Volcanic Field, New Mexico, USA) 11 / James St. John</span>

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Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, Ontario, Canada) 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/52273680098.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52273680098_8c2fa452a3_m.jpg" alt="" /></a><br />Spinifex metakomatiite (serpentinite) (Neoarchean, 2711-2719 Ma; near Pyke Hill, Ontario, Canada) 6 / James St. John</span>

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Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, 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/48931896087.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931896087_ba9419d31d_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 7 / James St. John</span>

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Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, 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/48931152463.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931152463_efca6f2751_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 11 / James St. John</span>

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Actinolite xenolith in sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, 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/48343310807.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48343310807_9b059de17f_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) 14 / James St. John</span>

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Chromite & serpentine (Neoarchean; Red Lodge Chromite District, 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/52575272423.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52575272423_3332191bc4_m.jpg" alt="" /></a><br />Chromite & serpentine (Neoarchean; Red Lodge Chromite District, Beartooth Mountains, Montana, USA) 2 / James St. John</span>

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Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, 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/48931680451.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931680451_dbbba55cf0_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 15 / James St. John</span>

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Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, 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/48931562231.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931562231_0639b46927_m.jpg" alt="" /></a><br />Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 16 / James St. John</span>

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Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, 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/49979702992.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49979702992_2be773996d_m.jpg" alt="" /></a><br />Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 14 / James St. John</span>

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Kyanitic eclogite (Late Cretaceous, 90-95 Ma; Pohorje Mountains, Slovenia) 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/54344572089.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/54344572089_c8116eb967_m.jpg" alt="" /></a><br />Kyanitic eclogite (Late Cretaceous, 90-95 Ma; Pohorje Mountains, Slovenia) 6 / James St. John</span>

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Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, 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/49895053953.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49895053953_3fe887f953_m.jpg" alt="" /></a><br />Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, 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) 38
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47926935863.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/47926935863_f4f681f150_m.jpg" alt="" /></a><br />Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 38 / James St. John</span>

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Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, 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/21441916662.html" target="_blank"><img src="http://farm1.static.flickr.com/731/21441916662_75b194fbc5_m.jpg" alt="" /></a><br />Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 4 / James St. John</span>

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Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte 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/48931696566.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48931696566_c0f50ef8f5_m.jpg" alt="" /></a><br />Madupite lamproite (Late Pliocene, 3 Ma; Pilot Butte volcanic center, Leucite Hills, Wyoming, USA) 10 / 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) 36
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52365442111.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52365442111_9287ef6dbf_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) 36 / James St. John</span>

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