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pyroxene

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Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 5
Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 9
Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 9
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 71
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) 71
by James St. John

クリエイティブ・コモンズ 表示 2.1


Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 25
Wyomingite (Lower Pleistocene, 0.95 Ma; quarry on volcanic cone on Zirkel Mesa, Leucite Hills Volcanic Province, Wyoming, USA) 25
by James St. John

クリエイティブ・コモンズ 表示 2.1

Anorthosite mixed with minor nelsonite (Poe Mountain Anorthosite, Mesoproterozoic, 1.431-1.436 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) 1
Anorthosite mixed with minor nelsonite (Poe Mountain Anorthosite, Mesoproterozoic, 1.431-1.436 Ga; Sybille Canyon, Laramie Range, Wyoming, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 42
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) 42
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 25
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) 25
by James St. John

クリエイティブ・コモンズ 表示 2.1

Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, USA) 7
Magnetite-ilmenite (Mesoproterozoic, ~1155 Ma; mine at Tahawus/Sanford Lake, New York State, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1

Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 26
Gabbroic anorthosite to anorthositic gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Merritt Creek West Skyline Parkway roadcut, Duluth, Minnesota, USA) 26
by James St. John

クリエイティブ・コモンズ 表示 2.1


Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 6
Anorthosite (Poe Mountain Anorthosite, Mesoproterozoic, 1.43 Ga; Sybille Canyon area, Laramie Range, Wyoming, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1

Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 17
Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 17
by James St. John

クリエイティブ・コモンズ 表示 2.1

Llao Rock (Crater Lake Caldera, Oregon, USA) 12
Llao Rock (Crater Lake Caldera, Oregon, USA) 12
by James St. John

クリエイティブ・コモンズ 表示 2.1


Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 20
Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 20
by James St. John

クリエイティブ・コモンズ 表示 2.1

Rhyodacite lava & pumice-fall deposit (Holocene, ~7.8 to 7.9 ka; eastern flanks of Llao Rock, Crater Lake Caldera, Oregon, USA) 4
Rhyodacite lava & pumice-fall deposit (Holocene, ~7.8 to 7.9 ka; eastern flanks of Llao Rock, Crater Lake Caldera, Oregon, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Old chromite mine (Beartooth Plateau, Montana, USA) 10
Old chromite mine (Beartooth Plateau, Montana, USA) 10
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 18
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) 18
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 47
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) 47
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 48
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) 48
by James St. John

クリエイティブ・コモンズ 表示 2.1


Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 15
Columnar-jointed rhyolitic obsidian lava flow (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

Porphyritic shoshonite (Denver Formation, 63-64 Ma, Lower Paleocene; Table Mountain, Golden, Colorado, USA) 4
Porphyritic shoshonite (Denver Formation, 63-64 Ma, Lower Paleocene; Table Mountain, Golden, Colorado, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 100
Inch-scale layering of plagioclase feldspar and pyroxene (Stillwater Complex, Neoarchean, 2.71 Ga; near the Stillwater Mine, Beartooth Mountains, Montana, USA) 100
by James St. John

クリエイティブ・コモンズ 表示 2.1


Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 12
Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 12
by James St. John

クリエイティブ・コモンズ 表示 2.1

Columnar-jointed orendite lamproite lava (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 15
Columnar-jointed orendite lamproite lava (Pleistocene, 1.30-1.37 Ma; Black Rock 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

Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 5
Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1


Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 17
Anorthosite (Ankafotia Anorthosite Massif, Neoproterozoic, ~660 Ma; Madagascar) 17
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 49
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) 49
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 37
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) 37
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 66
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) 66
by James St. John

クリエイティブ・コモンズ 表示 2.1

Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 11
Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 11
by James St. John

クリエイティブ・コモンズ 表示 2.1

Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 3
Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 22
Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 22
by James St. John

クリエイティブ・コモンズ 表示 2.1

Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 5
Gabbro (Duluth Complex, Mesoproterozoic, 1099 Ma; Rt. 1 roadcut between Heart Lake & Little Spring Lake, Minnesota, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Partially devitrified rhyolitic obsidian with lithophysa (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 6
Partially devitrified rhyolitic obsidian with lithophysa (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; 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


Microspinifex texture in metakomatiite (serpentinized) (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada)
Microspinifex texture in metakomatiite (serpentinized) (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada)
by James St. John

クリエイティブ・コモンズ 表示 2.1

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 9
Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 9
by James St. John

クリエイティブ・コモンズ 表示 2.1

Volga Blue Granite (anorthosite) (Volodarsk-Volhynsky Intrusion, Korosten Complex, Paleoproterozoic, 1.758-1.760 Ga; Zhitomir Province, Ukraine) 5
Volga Blue Granite (anorthosite) (Volodarsk-Volhynsky Intrusion, Korosten Complex, Paleoproterozoic, 1.758-1.760 Ga; Zhitomir Province, Ukraine) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1


Fault in volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA)
Fault in volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 1
Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

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


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) 34
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) 34
by James St. John

クリエイティブ・コモンズ 表示 2.1

Microcline-bearing pyroxenite (Iron Hill Carbonatite Complex, late Neoproterozoic, >570 Ma; Powderhorn area, Colorado, USA) 3
Microcline-bearing pyroxenite (Iron Hill Carbonatite Complex, late Neoproterozoic, >570 Ma; Powderhorn area, Colorado, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 4
Anorthosite ("Blue Eyes Granite") (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Ten Mile Bay Quarry, Labrador, Canada) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 38
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) 38
by James St. John

クリエイティブ・コモンズ 表示 2.1

Rainbow obsidian (Jalisco State, Mexico) 33
Rainbow obsidian (Jalisco State, Mexico) 33
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 32
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) 32
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 55
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) 55
by James St. John

クリエイティブ・コモンズ 表示 2.1

Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 4
Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 13
Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 13
by James St. John

クリエイティブ・コモンズ 表示 2.1


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) 33
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) 33
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 36
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) 36
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 35
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) 35
by James St. John

クリエイティブ・コモンズ 表示 2.1


Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 16
Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 16
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 70
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) 70
by James St. John

クリエイティブ・コモンズ 表示 2.1

Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 58
Wyomingite (Pleistocene, 950-960 ka; Zirkel Mesa, Leucite Hills, Wyoming, USA) 58
by James St. John

クリエイティブ・コモンズ 表示 2.1


Crater Lake Caldera & Mount Scott Volcano (Oregon, USA) 3
Crater Lake Caldera & Mount Scott Volcano (Oregon, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 2
Ophitic ilmenite gabbro (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Phonolite (Early Eocene, 50-54 Ma; roadcut along Beaver Creek Road, Bearpaw Mountains, Montana, USA) 1
Phonolite (Early Eocene, 50-54 Ma; roadcut along Beaver Creek Road, Bearpaw Mountains, Montana, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


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

Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 15
Volcanic breccia (Upper Oligocene, 25 Ma; Narbona Pass Maar Volcano, near the summit of the Chuska Mountains, Navajo Volcanic Field, New Mexico, USA) 15
by James St. John

クリエイティブ・コモンズ 表示 2.1

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) 62
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) 62
by James St. John

クリエイティブ・コモンズ 表示 2.1



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