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Porphyritic granite 12
Porphyritic granite 12
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic granite 10
Porphyritic granite 10
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic granite 11
Porphyritic granite 11
by James St. John

クリエイティブ・コモンズ 表示 2.1


Lamproite (Middle Park Lamproite, Early Oligocene, 33 Ma; 5 to 5.5 km west of Lake Granby, northeast-central Grand County, northern Colorado, USA) 2
Lamproite (Middle Park Lamproite, Early Oligocene, 33 Ma; 5 to 5.5 km west of Lake Granby, northeast-central Grand County, northern Colorado, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Glomeroporphyritic-textured igneous rock 2
Glomeroporphyritic-textured igneous rock 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic trachyte (Paleoproterozoic, 2.45-2.47 Ga; Bannockburn, Ontario, Canada) 2
Porphyritic trachyte (Paleoproterozoic, 2.45-2.47 Ga; Bannockburn, Ontario, Canada) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1


Porphyritic basaltic andesite (juvenile lava from a 14 June 2006 pyroclastic flow from Mt. Merapi, ~1200 m elevation at Bebeng, Java, Indonesia) 3
Porphyritic basaltic andesite (juvenile lava from a 14 June 2006 pyroclastic flow from Mt. Merapi, ~1200 m elevation at Bebeng, Java, Indonesia) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 5
"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Phlogopite leucite lamproite lava (Ellendale Center No. 5, Lower Miocene, 19-22 Ma; Ellendale Lamproite Field, northeastern Canning Basin, northern Western Australia) 2
Phlogopite leucite lamproite lava (Ellendale Center No. 5, Lower Miocene, 19-22 Ma; Ellendale Lamproite Field, northeastern Canning Basin, northern Western Australia) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1


Porphyritic leucite lava (Caprarola, Vico Lake, Viterbo, Italy) 3
Porphyritic leucite lava (Caprarola, Vico Lake, Viterbo, Italy) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Interesting rock (Maybe Granite with Phenocrysts?)
Interesting rock (Maybe Granite with Phenocrysts?)
by brewbooks

クリエイティブ・コモンズ 表示-継承 2.1

Porphyritic trachyte (Paleoproterozoic, 2.45-2.47 Ga; Bannockburn, Ontario, Canada) 1
Porphyritic trachyte (Paleoproterozoic, 2.45-2.47 Ga; Bannockburn, Ontario, Canada) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Porphyritic granite 9
Porphyritic granite 9
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 16
Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 16
by James St. John

クリエイティブ・コモンズ 表示 2.1

Forsterite olivine (derived from olivine orendite lamproite, Lower Pleistocene, 1.30 to 1.37 Ma; Black Rock, eastern Leucite Hills Volcanic Province, northeast of the town of Superior, southwestern Wyoming, USA)
Forsterite olivine (derived from olivine orendite lamproite, Lower Pleistocene, 1.30 to 1.37 Ma; Black Rock, eastern Leucite Hills Volcanic Province, northeast of the town of Superior, southwestern Wyoming, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1


Cumberlandite (porphyritic titaniferous magnetite melatroctolite) (ferrogabbro) (Neoproterozoic to Late Devonian, ~620 to ~370 Ma; Iron Mine Hill, east of Woonsocket, Rhode Island, USA)
Cumberlandite (porphyritic titaniferous magnetite melatroctolite) (ferrogabbro) (Neoproterozoic to Late Devonian, ~620 to ~370 Ma; Iron Mine Hill, east of Woonsocket, Rhode Island, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1

Anorthoclase crystal from kenyte lava (Late Pleistocene or Holocene; summit cone of Mt. Erebus Volcano, Ross Island, Antarctica) 2
Anorthoclase crystal from kenyte lava (Late Pleistocene or Holocene; summit cone of Mt. Erebus Volcano, Ross Island, Antarctica) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 1
"Imperial Porphyry" - porphyritic metadacite to porphyritic meta-andesite (Dokhan Volcanics, Neoproterozoic, ~593-602 Ma; Mons Porphyrites, Red Sea Mountains, Egypt) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Metanorthosite (Marcy Anorthosite, Mesoproterozoic, 1155 Ma; Rt. 73 roadcut near Chapel Pond, Adirondack Mountains, New York State, USA) 4
Metanorthosite (Marcy Anorthosite, Mesoproterozoic, 1155 Ma; Rt. 73 roadcut near Chapel Pond, Adirondack Mountains, New York State, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic granite (Precambrian; St. Cloud area, Minnesota, USA) 2
Porphyritic granite (Precambrian; St. Cloud area, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Hot Creek Rhyolite Flow (Pleistocene, 288 or 333 ka; Hot Creek Gorge, Long Valley Caldera, California, USA) 39
Hot Creek Rhyolite Flow (Pleistocene, 288 or 333 ka; Hot Creek Gorge, Long Valley Caldera, California, USA) 39
by James St. John

クリエイティブ・コモンズ 表示 2.1


Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 9
Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 9
by James St. John

クリエイティブ・コモンズ 表示 2.1

Phlogopite leucite lamproite lava (Ellendale Center No. 5, Lower Miocene, 19-22 Ma; Ellendale Lamproite Field, northeastern Canning Basin, northern Western Australia) 1
Phlogopite leucite lamproite lava (Ellendale Center No. 5, Lower Miocene, 19-22 Ma; Ellendale Lamproite Field, northeastern Canning Basin, northern Western Australia) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 3
Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Columnar-jointed rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Palisade Head, northeastern Minnesota, USA) 1
Columnar-jointed rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Palisade Head, northeastern Minnesota, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Hyalite opal on vesicular porphyritic leucite tephrite (Doupov Volcanic Complex, Oligocene to Lower Miocene; hills of the Doupov Mountains, north or west of Valec (Waltsch), northwestern Bohemia) 2
Hyalite opal on vesicular porphyritic leucite tephrite (Doupov Volcanic Complex, Oligocene to Lower Miocene; hills of the Doupov Mountains, north or west of Valec (Waltsch), northwestern Bohemia) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Olivine basalt (Pleistocene; lava flow near Keeler, California, USA)
Olivine basalt (Pleistocene; lava flow near Keeler, California, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1


Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 1
Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 2
Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, USA) 1
Obsidian & devitrified obsidian gravel (Obsidian Cliff, Yellowstone, Wyoming, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 2
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Altered andesite (Phantom Cone Andesite, Middle Pleistocene, 346-403 ka; Phantom Ship Island, Crater Lake Caldera, Oregon, USA) 5
Altered andesite (Phantom Cone Andesite, Middle Pleistocene, 346-403 ka; Phantom Ship Island, Crater Lake Caldera, Oregon, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 3
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Denver & Rio Grande Western Railroad # 683 steam locomotive (Baldwin C-28 2-8-0) 2
Denver & Rio Grande Western Railroad # 683 steam locomotive (Baldwin C-28 2-8-0) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 7
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic rhyolite (Cenozoic; Chaffee County, Colorado, USA) 2
Porphyritic rhyolite (Cenozoic; Chaffee County, Colorado, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1


Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 14
Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 14
by James St. John

クリエイティブ・コモンズ 表示 2.1

Sunstone (Tertiary; Spectrum Mine, Oregon, USA) 12
Sunstone (Tertiary; Spectrum Mine, Oregon, USA) 12
by James St. John

クリエイティブ・コモンズ 表示 2.1

Red Cone (Late Pleistocene cinder cone with basaltic andesite, 35-36 ka; northwest of Crater Lake Caldera, Oregon, USA) 10
Red Cone (Late Pleistocene cinder cone with basaltic andesite, 35-36 ka; northwest of Crater Lake Caldera, Oregon, USA) 10
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) 34
Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 34
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 4
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Sunstone (Tertiary; Spectrum Mine, Oregon, USA) 8
Sunstone (Tertiary; Spectrum Mine, Oregon, USA) 8
by James St. John

クリエイティブ・コモンズ 表示 2.1


Lamproite (Middle Park Lamproite, Early Oligocene, 33 Ma; 5 to 5.5 km west of Lake Granby, northeast-central Grand County, northern Colorado, USA) 1
Lamproite (Middle Park Lamproite, Early Oligocene, 33 Ma; 5 to 5.5 km west of Lake Granby, northeast-central Grand County, northern Colorado, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 33
Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 33
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 5
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1


Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 6
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 6
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 4
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1


Vesicular porphyritic olivine basalt with lower crustal gabbro xenolith (31 January to 19 February 1960 Kapoho Eruption; town of Kapoho, Puna Rift Zone, Kilauea Volcano, easternmost Hawaii, USA)
Vesicular porphyritic olivine basalt with lower crustal gabbro xenolith (31 January to 19 February 1960 Kapoho Eruption; town of Kapoho, Puna Rift Zone, Kilauea Volcano, easternmost Hawaii, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 5
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 2
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1


Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 8
Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 8
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 1
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 1
Lamprophyre breccia (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Black porphyritic metarhyolite (Utley Rhyolite, Paleoproterozoic, 1765 Ma; Utley Rhyolite Quarry, near Green Lake, Wisconsin, USA) 4
Black porphyritic metarhyolite (Utley Rhyolite, Paleoproterozoic, 1765 Ma; Utley Rhyolite Quarry, near Green Lake, Wisconsin, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 3
Lamprophyre breccia & lamprophyre dike (Cresson Pipe, Cripple Creek Diatreme, Early Oligocene, ~28.5 Ma; western side of Cresson Pit, Cripple Creek Mining District, Colorado, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic rhyolite (Cenozoic; Chaffee County, Colorado, USA) 1
Porphyritic rhyolite (Cenozoic; Chaffee County, Colorado, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 1
Andesite (1997 lava from Soufriere Hills Volcano, Montserrat, Lesser Antilles Volcanic Arc, eastern Caribbean Sea) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 15
Wizard Island Cinder Cone (Holocene, ~7.2 ka; Crater Lake Caldera, Oregon, USA) 15
by James St. John

クリエイティブ・コモンズ 表示 2.1

Porphyritic diabase (Cape Ann, Massachusetts, USA) 3
Porphyritic diabase (Cape Ann, Massachusetts, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1



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