feldspar

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Sulfidic anorthosite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; 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/50424451578.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50424451578_ea8cf5b18d_m.jpg" alt="" /></a><br />Sulfidic anorthosite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 5 / James St. John</span>

サイズ変更など

topaz var. brown topaz, mica var. lepidolite, feldspar var. orthoclase
by géry60

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/9099593277.html" target="_blank"><img src="http://farm6.static.flickr.com/5465/9099593277_98711b02f6_m.jpg" alt="" /></a><br />topaz var. brown topaz, mica var. lepidolite, feldspar var. orthoclase / géry60</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/21462024751.html" target="_blank"><img src="http://farm1.static.flickr.com/707/21462024751_d237c60d82_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

beryl var. aquamarine, tourmaline var. schorl, feldspar var. orthoclase
by géry60

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/10477742236.html" target="_blank"><img src="http://farm3.static.flickr.com/2868/10477742236_a5accebb22_m.jpg" alt="" /></a><br />beryl var. aquamarine, tourmaline var. schorl, feldspar var. orthoclase / géry60</span>

サイズ変更など

Graphic granite (runite) (Ruggles Pegmatite, New Hampshire Plutonic Series, Devonian; Ruggles Pegmatite Mine, western New Hampshire, 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/14815960350.html" target="_blank"><img src="http://farm4.static.flickr.com/3880/14815960350_25a8909bdf_m.jpg" alt="" /></a><br />Graphic granite (runite) (Ruggles Pegmatite, New Hampshire Plutonic Series, Devonian; Ruggles Pegmatite Mine, western New Hampshire, USA) / James St. John</span>

サイズ変更など

Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50823991307.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50823991307_f1db9a6b30_m.jpg" alt="" /></a><br />Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga;  Stillwater Mine, Beartooth Mountains, Montana, USA) 4 / James St. John</span>

サイズ変更など

Crater Lake Caldera (Oregon, USA) 83
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/40150653783.html" target="_blank"><img src="http://farm8.static.flickr.com/7925/40150653783_7abaaa31ed_m.jpg" alt="" /></a><br />Crater Lake Caldera (Oregon, USA) 83 / James St. John</span>

サイズ変更など

Barre Granite (granodiorite, Barre Pluton, ~380 Ma, Devonian; Barre Granite Quarry District, Washington County, Vermont, 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/14620311659.html" target="_blank"><img src="http://farm3.static.flickr.com/2898/14620311659_51bdf9c16f_m.jpg" alt="" /></a><br />Barre Granite (granodiorite, Barre Pluton, ~380 Ma, Devonian; Barre Granite Quarry District, Washington County, Vermont, USA) / James St. John</span>

サイズ変更など

Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 25
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/22248976702.html" target="_blank"><img src="http://farm1.static.flickr.com/721/22248976702_3e426fe4b6_m.jpg" alt="" /></a><br />Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 25 / James St. John</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, 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/21266644269.html" target="_blank"><img src="http://farm6.static.flickr.com/5740/21266644269_830e25a748_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, Minnesota, USA) 1 / James St. John</span>

サイズ変更など

Argillic zone alteration from hydrothermal veins (Orphan Boy Mine, Butte, Montana, 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/51011092771.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51011092771_84b6e2f4ba_m.jpg" alt="" /></a><br />Argillic zone alteration from hydrothermal veins (Orphan Boy Mine, Butte, Montana, USA) 10 / James St. John</span>

サイズ変更など

Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, 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/23754811168.html" target="_blank"><img src="http://farm5.static.flickr.com/4499/23754811168_1655c2b0e3_m.jpg" alt="" /></a><br />Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 4 / James St. John</span>

サイズ変更など

Platinum-palladium ore (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/49971303896.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49971303896_a6d65c7951_m.jpg" alt="" /></a><br />Platinum-palladium ore (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 10 / James St. John</span>

サイズ変更など

corundum var. sapphire, feldspar var. albite, mica var. biotite
by géry60

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/14259360710.html" target="_blank"><img src="http://farm3.static.flickr.com/2899/14259360710_514e57630f_m.jpg" alt="" /></a><br />corundum var. sapphire, feldspar var. albite, mica var. biotite / géry60</span>

サイズ変更など

Verde Butterfly Granite (garnetiferous charnockite, ~500-650 Ma, southeastern 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/14813435052.html" target="_blank"><img src="http://farm6.static.flickr.com/5557/14813435052_ed2734297b_m.jpg" alt="" /></a><br />Verde Butterfly Granite (garnetiferous charnockite, ~500-650 Ma, southeastern Brazil) / James St. John</span>

サイズ変更など

Garnetiferous metanorthosite (Marcy Anorthosite, Mesoproterozoic, 1155 Ma; Rt. 73 roadcut near Chapel Pond, Adirondack Mountains, New York State, 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/30779518243.html" target="_blank"><img src="http://farm1.static.flickr.com/376/30779518243_23a65eeaee_m.jpg" alt="" /></a><br />Garnetiferous metanorthosite (Marcy Anorthosite, Mesoproterozoic, 1155 Ma; Rt. 73 roadcut near Chapel Pond, Adirondack Mountains, New York State, USA) 2 / James St. John</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, Minnesota, 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/20832324343.html" target="_blank"><img src="http://farm1.static.flickr.com/701/20832324343_274836198e_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large loose block at Ely visitor center, Ely, Minnesota, USA) 9 / James St. John</span>

サイズ変更など

Goettel Escarpment K-feldspar porphyry
by euphro

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/5876139691.html" target="_blank"><img src="http://farm6.static.flickr.com/5222/5876139691_d5090bb6c0_m.jpg" alt="" /></a><br />Goettel Escarpment K-feldspar porphyry / euphro</span>

サイズ変更など

Na-Ca altered porphyritic granite (Yerington Batholith, Middle Jurassic, 168.5 to 169.4 Ma; just west of Mickey Pass, Singatse Range, Lyon County, Nevada, 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/14911901299.html" target="_blank"><img src="http://farm6.static.flickr.com/5573/14911901299_642bfb497a_m.jpg" alt="" /></a><br />Na-Ca altered porphyritic granite (Yerington Batholith, Middle Jurassic, 168.5 to 169.4 Ma; just west of Mickey Pass, Singatse Range, Lyon County, Nevada, USA) / James St. John</span>

サイズ変更など

Porphyritic leucite lava (Caprarola, Vico Lake, Viterbo, Italy) 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/51197126825.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51197126825_329eb4f538_m.jpg" alt="" /></a><br />Porphyritic leucite lava (Caprarola, Vico Lake, Viterbo, Italy) 4 / 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) 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/14811063284.html" target="_blank"><img src="http://farm4.static.flickr.com/3894/14811063284_5179b887c7_m.jpg" alt="" /></a><br />Volga Blue Granite (anorthosite, Volodarsk-Volhynsky Intrusion, Korosten Complex, Paleoproterozoic, 1.758-1.760 Ga; Zhitomir Province, Ukraine) 1 / James St. John</span>

サイズ変更など

Vesicular basalt (Quaternary; Snake River Plain, Idaho, 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/52681132434.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52681132434_13d0de2f14_m.jpg" alt="" /></a><br />Vesicular basalt (Quaternary; Snake River Plain, Idaho, USA) 3 / James St. John</span>

サイズ変更など

Little Sahara Recreation Area, Juab County, Utah
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/7186838404.html" target="_blank"><img src="http://farm8.static.flickr.com/7095/7186838404_2c618c9e55_m.jpg" alt="" /></a><br />Little Sahara Recreation Area, Juab County, Utah / Ken Lund</span>

サイズ変更など

Feldspar Mostly Asleep
by dcseain

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/4145439178.html" target="_blank"><img src="http://farm3.static.flickr.com/2511/4145439178_5d97643fa6_m.jpg" alt="" /></a><br />Feldspar Mostly Asleep / dcseain</span>

サイズ変更など

corundum var. sapphire, feldspar var. albite, mica var. biotite
by géry60

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/14259344338.html" target="_blank"><img src="http://farm4.static.flickr.com/3901/14259344338_14e6cd20d1_m.jpg" alt="" /></a><br />corundum var. sapphire, feldspar var. albite, mica var. biotite / géry60</span>

サイズ変更など

Mount Scott Volcano (Crater Lake National Park, Oregon, 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/28156743228.html" target="_blank"><img src="http://farm1.static.flickr.com/943/28156743228_a4b4b72ae8_m.jpg" alt="" /></a><br />Mount Scott Volcano (Crater Lake National Park, Oregon, USA) 4 / James St. John</span>

サイズ変更など

Mesquite Flat Sand Dunes, Death Valley National Park, California
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/16542437987.html" target="_blank"><img src="http://farm8.static.flickr.com/7599/16542437987_9d6b0259fc_m.jpg" alt="" /></a><br />Mesquite Flat Sand Dunes, Death Valley National Park, California / Ken Lund</span>

サイズ変更など

Pisolitic bauxite 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/23544809576.html" target="_blank"><img src="http://farm6.static.flickr.com/5735/23544809576_62f547295f_m.jpg" alt="" /></a><br />Pisolitic bauxite 3 / James St. John</span>

サイズ変更など

Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50823896951.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50823896951_7dcb94fdc8_m.jpg" alt="" /></a><br />Sulfidic norite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga;  Stillwater Mine, Beartooth Mountains, Montana, USA) 6 / James St. John</span>

サイズ変更など

Dolerite ventifact (Dry Valleys, Antarctica) 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/31579269794.html" target="_blank"><img src="http://farm1.static.flickr.com/486/31579269794_06c7a8536d_m.jpg" alt="" /></a><br />Dolerite ventifact (Dry Valleys, Antarctica) 3 / James St. John</span>

サイズ変更など

Graphic granite (runite) (Eight Mile Park Pegmatite District, Mesoproterozoic, 1.430 to 1.474 Ga; roadcut along 3A Road, north of Royal Gorge Bridge, west of Canon City, south-central Colorado, 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/14816088257.html" target="_blank"><img src="http://farm4.static.flickr.com/3917/14816088257_44be561dfb_m.jpg" alt="" /></a><br />Graphic granite (runite) (Eight Mile Park Pegmatite District, Mesoproterozoic, 1.430 to 1.474 Ga; roadcut along 3A Road, north of Royal Gorge Bridge, west of Canon City, south-central Colorado, USA) 2 / 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) 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/16798439431.html" target="_blank"><img src="http://farm8.static.flickr.com/7623/16798439431_a648eed3ed_m.jpg" alt="" /></a><br />Moro Rock exfoliation dome (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Sequoia National Park, California, USA) 5 / James St. John</span>

サイズ変更など

Villiaumitic lujavrite (Illímaussaq Complex, late Mesoproterozoic, 1.16 Ga; Kvanefjeld, southern Greenland) 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/15177312497.html" target="_blank"><img src="http://farm4.static.flickr.com/3867/15177312497_34f6be81c0_m.jpg" alt="" /></a><br />Villiaumitic lujavrite (Illímaussaq Complex, late Mesoproterozoic, 1.16 Ga; Kvanefjeld, southern Greenland) 5 / James St. John</span>

サイズ変更など

Coarsely-crystalline porphyritic granite (Pikes Peak Batholith (pgpm2 facies), Mesoproterozoic, 1.08 Ga; a little east of summit house atop Pikes Peak, central Colorado, 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/15025097545.html" target="_blank"><img src="http://farm4.static.flickr.com/3917/15025097545_edfbd71d4b_m.jpg" alt="" /></a><br />Coarsely-crystalline porphyritic granite (Pikes Peak Batholith (pgpm2 facies), Mesoproterozoic, 1.08 Ga; a little east of summit house atop Pikes Peak, central Colorado, USA) 1 / James St. John</span>

サイズ変更など

Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23208078982.html" target="_blank"><img src="http://farm6.static.flickr.com/5793/23208078982_a28f01be7d_m.jpg" alt="" /></a><br />Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, USA) 5 / James St. John</span>

サイズ変更など

Vesicular basalt 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/8456439508.html" target="_blank"><img src="http://farm9.static.flickr.com/8519/8456439508_69dcbcf8ab_m.jpg" alt="" /></a><br />Vesicular basalt 1 / James St. John</span>

サイズ変更など

Lakeshore beach gravel (upper Holocene; derived from the Split Rock intrusive felsite, Proterozoic; Iona's Beach, northeastern Minnesota, 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/23350559195.html" target="_blank"><img src="http://farm6.static.flickr.com/5682/23350559195_1ab5d8382d_m.jpg" alt="" /></a><br />Lakeshore beach gravel (upper Holocene; derived from the Split Rock intrusive felsite, Proterozoic; Iona's Beach, northeastern Minnesota, USA) 8 / James St. John</span>

サイズ変更など

Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, 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/36906181333.html" target="_blank"><img src="http://farm5.static.flickr.com/4484/36906181333_74686ecc89_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 22 / James St. John</span>

サイズ変更など

corundum var. sapphire, feldspar var. albite, mica var. biotite
by géry60

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/14444868764.html" target="_blank"><img src="http://farm6.static.flickr.com/5483/14444868764_7b3650d4b6_m.jpg" alt="" /></a><br />corundum var. sapphire, feldspar var. albite, mica var. biotite / géry60</span>

サイズ変更など

Ubatuba Granite (charnockite, ~500-650 Ma; Ubatuba, 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/14627079610.html" target="_blank"><img src="http://farm3.static.flickr.com/2914/14627079610_4180cde82f_m.jpg" alt="" /></a><br />Ubatuba Granite (charnockite, ~500-650 Ma; Ubatuba, Brazil) / James St. John</span>

サイズ変更など

Xenolith in granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, 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/16592299327.html" target="_blank"><img src="http://farm9.static.flickr.com/8568/16592299327_5792a30830_m.jpg" alt="" /></a><br />Xenolith in granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, Sequoia National Park, California, USA) 7 / James St. John</span>

サイズ変更など

Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern 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/23020693520.html" target="_blank"><img src="http://farm1.static.flickr.com/692/23020693520_6a76bcfeb4_m.jpg" alt="" /></a><br />Olivine diabase (Lafayette Bluff Sill, Proterozoic; Lafayette Bluff Tunnel, northeastern Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Lakeshore beach gravel (upper Holocene; derived from the Split Rock intrusive felsite, Proterozoic; Iona's Beach, northeastern Minnesota, 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/22723559223.html" target="_blank"><img src="http://farm6.static.flickr.com/5680/22723559223_1f172c096f_m.jpg" alt="" /></a><br />Lakeshore beach gravel (upper Holocene; derived from the Split Rock intrusive felsite, Proterozoic; Iona's Beach, northeastern Minnesota, USA) 9 / James St. John</span>

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Scapolite (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/30525995764.html" target="_blank"><img src="http://farm6.static.flickr.com/5487/30525995764_9238ae70b8_m.jpg" alt="" /></a><br />Scapolite (Canada) 1 / James St. John</span>

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Granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, Sequoia National Park, California, 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/16592282717.html" target="_blank"><img src="http://farm8.static.flickr.com/7628/16592282717_5552317914_m.jpg" alt="" /></a><br />Granodiorite (Giant Forest Granodiorite, mid-Cretaceous, 97-102 Ma; Moro Rock, Sequoia National Park, California, USA) 5 / James St. John</span>

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Coarsely-crystalline porphyritic granite (Pikes Peak Batholith (pgmc facies), Mesoproterozoic, 1.08 Ga; Pikes Peak Cog Railway parking lot, central 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/14838560747.html" target="_blank"><img src="http://farm6.static.flickr.com/5567/14838560747_f61b85ba8c_m.jpg" alt="" /></a><br />Coarsely-crystalline porphyritic granite (Pikes Peak Batholith (pgmc facies), Mesoproterozoic, 1.08 Ga; Pikes Peak Cog Railway parking lot, central Colorado, USA) / James St. John</span>

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Narrows Basalt (Lower Pleistocene, 1.5-1.6 Ma) (Narrows of the Yellowstone River, northeastern Yellowstone National Park, 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/19944882289.html" target="_blank"><img src="http://farm1.static.flickr.com/514/19944882289_1e5fecae6d_m.jpg" alt="" /></a><br />Narrows Basalt (Lower Pleistocene, 1.5-1.6 Ma) (Narrows of the Yellowstone River, northeastern Yellowstone National Park, Wyoming, USA) 3 / James St. John</span>

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Basaltic effusive eruption (early evening, 9 December 2022) (“Fissure 3”, Northeast Rift Zone, Mauna Loa Volcano, Hawaii)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52554284745.html" target="_blank"><img src="http://farm0.static.flickr.com/0/52554284745_d7ce2aa5d4_m.jpg" alt="" /></a><br />Basaltic effusive eruption (early evening, 9 December 2022) (“Fissure 3”, Northeast Rift Zone, Mauna Loa Volcano, Hawaii) / James St. John</span>

サイズ変更など

Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, 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/37543739482.html" target="_blank"><img src="http://farm5.static.flickr.com/4483/37543739482_8e7b4f48ae_m.jpg" alt="" /></a><br />Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 1 / James St. John</span>

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Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 22
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/22074982869.html" target="_blank"><img src="http://farm6.static.flickr.com/5672/22074982869_a8fafd6ef1_m.jpg" alt="" /></a><br />Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 22 / James St. John</span>

サイズ変更など

Porphyritic andesite (Boulder 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/52150841890.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52150841890_b0db865224_m.jpg" alt="" /></a><br />Porphyritic andesite (Boulder County, Colorado, USA) / James St. John</span>

サイズ変更など

beryl var. aquamarine, tourmaline var. schorl, quartz, feldspar var. orthoclase
by géry60

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/16336209235.html" target="_blank"><img src="http://farm8.static.flickr.com/7548/16336209235_4832808775_m.jpg" alt="" /></a><br />beryl var. aquamarine, tourmaline var. schorl, quartz, feldspar var. orthoclase / géry60</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) 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/21461396771.html" target="_blank"><img src="http://farm1.static.flickr.com/697/21461396771_a27fddc696_m.jpg" alt="" /></a><br />Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, 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/21266493698.html" target="_blank"><img src="http://farm6.static.flickr.com/5781/21266493698_f245084cd8_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 12 / James St. John</span>

サイズ変更など

Anorthosite (Laramie Anorthosite Complex, 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/50421873552.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50421873552_e785d264a0_m.jpg" alt="" /></a><br />Anorthosite (Laramie Anorthosite Complex, Mesoproterozoic, 1.43 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) 2 / James St. John</span>

サイズ変更など

Sulfidic anorthosite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, 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/50425146701.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/50425146701_f833dd4025_m.jpg" alt="" /></a><br />Sulfidic anorthosite (platinum-palladium ore) (Johns-Manville Reef, Stillwater Complex, Neoarchean, 2.71 Ga; Stillwater Mine, Beartooth Mountains, Montana, USA) 13 / James St. John</span>

サイズ変更など

Verde Lavras Granite (orthogneiss, Paleoproterozoic, 1.9 Ga; Lavras, Minas Gerais State, 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/14626857039.html" target="_blank"><img src="http://farm4.static.flickr.com/3851/14626857039_cf07e25ba2_m.jpg" alt="" /></a><br />Verde Lavras Granite (orthogneiss, Paleoproterozoic, 1.9 Ga; Lavras, Minas Gerais State, Brazil) / James St. John</span>

サイズ変更など

Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/21443427352.html" target="_blank"><img src="http://farm1.static.flickr.com/579/21443427352_b313ff0d74_m.jpg" alt="" /></a><br />Metamorphosed pillow basalt (Ely Greenstone, Neoarchean, ~2.722 Ga; large glacial erratic along Main Street, Ely, Minnesota, USA) 6 / James St. John</span>

サイズ変更など

Pegmatitic feldspathic orthopyroxenite (Merensky Reef, Bushveld Complex, mid-Paleoproterozoic, 2.054-2.055 Ga; Rustenburg Platinum Mine, northeastern South Africa)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15179304120.html" target="_blank"><img src="http://farm4.static.flickr.com/3918/15179304120_234efee326_m.jpg" alt="" /></a><br />Pegmatitic feldspathic orthopyroxenite (Merensky Reef, Bushveld Complex, mid-Paleoproterozoic, 2.054-2.055 Ga; Rustenburg Platinum Mine, northeastern South Africa) / James St. John</span>

サイズ変更など

Mesquite Flat Sand Dunes, Death Valley National Park, California
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/16127394974.html" target="_blank"><img src="http://farm9.static.flickr.com/8597/16127394974_79aa51c22d_m.jpg" alt="" /></a><br />Mesquite Flat Sand Dunes, Death Valley National Park, California / Ken Lund</span>

サイズ変更など

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