#xenolith — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #xenolith, aggregated by home.social.
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A gorgeous thin section of a xenolith-rich lamprophyre dyke from near Ayer's Cliff, Quebec (Cretaceous, Monteregian-age, so ~120 Ma). Pelitic crustal assemblages equilibrated at 700-800°C and 8-10 kbar, while we're currently studying the lherzolite mantle xenolith (above and right of center), which is likely Grenville (~ 1 Ga) in age. Image by Justin Plouffe, #McGillUniversity
#ThinSectionThursday #Quebec #Lithosphere #Grenville #Xenolith
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A gorgeous thin section of a xenolith-rich lamprophyre dyke from near Ayer's Cliff, Quebec (Cretaceous, Monteregian-age, so ~120 Ma). Pelitic crustal assemblages equilibrated at 700-800°C and 8-10 kbar, while we're currently studying the lherzolite mantle xenolith (above and right of center), which is likely Grenville (~ 1 Ga) in age. Image by Justin Plouffe, #McGillUniversity
#ThinSectionThursday #Quebec #Lithosphere #Grenville #Xenolith
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A gorgeous thin section of a xenolith-rich lamprophyre dyke from near Ayer's Cliff, Quebec (Cretaceous, Monteregian-age, so ~120 Ma). Pelitic crustal assemblages equilibrated at 700-800°C and 8-10 kbar, while we're currently studying the lherzolite mantle xenolith (above and right of center), which is likely Grenville (~ 1 Ga) in age. Image by Justin Plouffe, #McGillUniversity
#ThinSectionThursday #Quebec #Lithosphere #Grenville #Xenolith
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A gorgeous thin section of a xenolith-rich lamprophyre dyke from near Ayer's Cliff, Quebec (Cretaceous, Monteregian-age, so ~120 Ma). Pelitic crustal assemblages equilibrated at 700-800°C and 8-10 kbar, while we're currently studying the lherzolite mantle xenolith (above and right of center), which is likely Grenville (~ 1 Ga) in age. Image by Justin Plouffe, #McGillUniversity
#ThinSectionThursday #Quebec #Lithosphere #Grenville #Xenolith
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A gorgeous thin section of a xenolith-rich lamprophyre dyke from near Ayer's Cliff, Quebec (Cretaceous, Monteregian-age, so ~120 Ma). Pelitic crustal assemblages equilibrated at 700-800°C and 8-10 kbar, while we're currently studying the lherzolite mantle xenolith (above and right of center), which is likely Grenville (~ 1 Ga) in age. Image by Justin Plouffe, #McGillUniversity
#ThinSectionThursday #Quebec #Lithosphere #Grenville #Xenolith
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A xenolith embedded in a Cretaceous lamprophyre dyke. This is a pyroxenite: almost all of the crystals are orthopyroxene or clinopyroxene. There is some late hydrous alteration at grain boundaries. A whole thin section scan in plane-polarized light.
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A xenolith embedded in a Cretaceous lamprophyre dyke. This is a pyroxenite: almost all of the crystals are orthopyroxene or clinopyroxene. There is some late hydrous alteration at grain boundaries. A whole thin section scan in plane-polarized light.
-
A xenolith embedded in a Cretaceous lamprophyre dyke. This is a pyroxenite: almost all of the crystals are orthopyroxene or clinopyroxene. There is some late hydrous alteration at grain boundaries. A whole thin section scan in plane-polarized light.
-
A xenolith embedded in a Cretaceous lamprophyre dyke. This is a pyroxenite: almost all of the crystals are orthopyroxene or clinopyroxene. There is some late hydrous alteration at grain boundaries. A whole thin section scan in plane-polarized light.
-
A xenolith embedded in a Cretaceous lamprophyre dyke. This is a pyroxenite: almost all of the crystals are orthopyroxene or clinopyroxene. There is some late hydrous alteration at grain boundaries. A whole thin section scan in plane-polarized light.
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This scarf is a gift for my uncle, inspired by quartz clusters we saw together backpacking in Cottonwood Canyon in Death Valley. From what I've been reading I think they were formed by intrusive igneous rock forming around xenoliths, and by cooling very slowly forming the incredible quartz crystals we saw, which looked like rings around the darker xenoliths in the weathered rock face we saw. I'm not trained as a geologist though and would love to find more information about the geology of Cottonwood Canyon from someone with some real expertise!
The wool is targhee roving I got at the nor cal ren faire. I spun it on my small cross arm spindle and wove it on a loom I've been borrowing from a friend. It's plain weave set at 8epi. It looked very open on the loom, but fulled into a wonderfully bouncy and dense fabric.
After fulling I scoured the fabric, then used rubber bands to do this shibori inspired dye process. After putting on the rubber bands I gave it a bath in tannins I extracted from an oak gall, then in a bath of cool water with just a tiny bit of dissolved ferrous sulfate. It was so exciting to see the fabric turn grey in a a matter of just a few minutes when I put it in the iron bath!
#handweaving
#weaving
#handspinning
#naturaldyes
#dyes
#textiles
#handwoven
#handspun
#tiedye
#shibori
#oakgalls
#ferroussulfate
#naturaldye
#targhee
#wool
#geology
#xenolith
#quartz
#deathvalley -
This scarf is a gift for my uncle, inspired by quartz clusters we saw together backpacking in Cottonwood Canyon in Death Valley. From what I've been reading I think they were formed by intrusive igneous rock forming around xenoliths, and by cooling very slowly forming the incredible quartz crystals we saw, which looked like rings around the darker xenoliths in the weathered rock face we saw. I'm not trained as a geologist though and would love to find more information about the geology of Cottonwood Canyon from someone with some real expertise!
The wool is targhee roving I got at the nor cal ren faire. I spun it on my small cross arm spindle and wove it on a loom I've been borrowing from a friend. It's plain weave set at 8epi. It looked very open on the loom, but fulled into a wonderfully bouncy and dense fabric.
After fulling I scoured the fabric, then used rubber bands to do this shibori inspired dye process. After putting on the rubber bands I gave it a bath in tannins I extracted from an oak gall, then in a bath of cool water with just a tiny bit of dissolved ferrous sulfate. It was so exciting to see the fabric turn grey in a a matter of just a few minutes when I put it in the iron bath!
#handweaving
#weaving
#handspinning
#naturaldyes
#dyes
#textiles
#handwoven
#handspun
#tiedye
#shibori
#oakgalls
#ferroussulfate
#naturaldye
#targhee
#wool
#geology
#xenolith
#quartz
#deathvalley -
This scarf is a gift for my uncle, inspired by quartz clusters we saw together backpacking in Cottonwood Canyon in Death Valley. From what I've been reading I think they were formed by intrusive igneous rock forming around xenoliths, and by cooling very slowly forming the incredible quartz crystals we saw, which looked like rings around the darker xenoliths in the weathered rock face we saw. I'm not trained as a geologist though and would love to find more information about the geology of Cottonwood Canyon from someone with some real expertise!
The wool is targhee roving I got at the nor cal ren faire. I spun it on my small cross arm spindle and wove it on a loom I've been borrowing from a friend. It's plain weave set at 8epi. It looked very open on the loom, but fulled into a wonderfully bouncy and dense fabric.
After fulling I scoured the fabric, then used rubber bands to do this shibori inspired dye process. After putting on the rubber bands I gave it a bath in tannins I extracted from an oak gall, then in a bath of cool water with just a tiny bit of dissolved ferrous sulfate. It was so exciting to see the fabric turn grey in a a matter of just a few minutes when I put it in the iron bath!
#handweaving
#weaving
#handspinning
#naturaldyes
#dyes
#textiles
#handwoven
#handspun
#tiedye
#shibori
#oakgalls
#ferroussulfate
#naturaldye
#targhee
#wool
#geology
#xenolith
#quartz
#deathvalley -
This scarf is a gift for my uncle, inspired by quartz clusters we saw together backpacking in Cottonwood Canyon in Death Valley. From what I've been reading I think they were formed by intrusive igneous rock forming around xenoliths, and by cooling very slowly forming the incredible quartz crystals we saw, which looked like rings around the darker xenoliths in the weathered rock face we saw. I'm not trained as a geologist though and would love to find more information about the geology of Cottonwood Canyon from someone with some real expertise!
The wool is targhee roving I got at the nor cal ren faire. I spun it on my small cross arm spindle and wove it on a loom I've been borrowing from a friend. It's plain weave set at 8epi. It looked very open on the loom, but fulled into a wonderfully bouncy and dense fabric.
After fulling I scoured the fabric, then used rubber bands to do this shibori inspired dye process. After putting on the rubber bands I gave it a bath in tannins I extracted from an oak gall, then in a bath of cool water with just a tiny bit of dissolved ferrous sulfate. It was so exciting to see the fabric turn grey in a a matter of just a few minutes when I put it in the iron bath!
#handweaving
#weaving
#handspinning
#naturaldyes
#dyes
#textiles
#handwoven
#handspun
#tiedye
#shibori
#oakgalls
#ferroussulfate
#naturaldye
#targhee
#wool
#geology
#xenolith
#quartz
#deathvalley -
This scarf is a gift for my uncle, inspired by quartz clusters we saw together backpacking in Cottonwood Canyon in Death Valley. From what I've been reading I think they were formed by intrusive igneous rock forming around xenoliths, and by cooling very slowly forming the incredible quartz crystals we saw, which looked like rings around the darker xenoliths in the weathered rock face we saw. I'm not trained as a geologist though and would love to find more information about the geology of Cottonwood Canyon from someone with some real expertise!
The wool is targhee roving I got at the nor cal ren faire. I spun it on my small cross arm spindle and wove it on a loom I've been borrowing from a friend. It's plain weave set at 8epi. It looked very open on the loom, but fulled into a wonderfully bouncy and dense fabric.
After fulling I scoured the fabric, then used rubber bands to do this shibori inspired dye process. After putting on the rubber bands I gave it a bath in tannins I extracted from an oak gall, then in a bath of cool water with just a tiny bit of dissolved ferrous sulfate. It was so exciting to see the fabric turn grey in a a matter of just a few minutes when I put it in the iron bath!
#handweaving
#weaving
#handspinning
#naturaldyes
#dyes
#textiles
#handwoven
#handspun
#tiedye
#shibori
#oakgalls
#ferroussulfate
#naturaldye
#targhee
#wool
#geology
#xenolith
#quartz
#deathvalley -
A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.
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A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.
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@oldclumsy_nowmad @mineralsocamerica.bsky.social @FaithfullJohn
This EBSD scan was part of an M.Sc. thesis by Arvid Gonzalez -we're working getting it published, but in the meantime, his unpublished thesis can be downloaded from:
https://escholarship.mcgill.ca/concern/theses/cf95jh65k?locale=en
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@oldclumsy_nowmad @mineralsocamerica.bsky.social @FaithfullJohn
This EBSD scan was part of an M.Sc. thesis by Arvid Gonzalez -we're working getting it published, but in the meantime, his unpublished thesis can be downloaded from:
https://escholarship.mcgill.ca/concern/theses/cf95jh65k?locale=en
-
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
A mantle xenolith (dunite) infiltrated by mafic melt on the left side. The melt has crystallized clinopyroxene, as shown by this electron backscattered diffraction image. Each pixel's data is a diffraction pattern that can determine mineral type and crystallographic orientation.
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A mantle xenolith (dunite) infiltrated by mafic melt on the left side. The melt has crystallized clinopyroxene, as shown by this electron backscattered diffraction image. Each pixel's data is a diffraction pattern that can determine mineral type and crystallographic orientation.
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Wednesday, early afternoon posters at #AGU23
MR31B-0084 Effects of melt-rock interactions on deformation fabrics and rock physical properties in the shallow mantle lithosphere
James Kirkpatrick presenting, but this is the the M.Sc. work of Arvid Gonzalez (now core-logging in n. QC). Other authors are myself and Caroline Seyler (U. Minnesota).Arvid found that infiltrating mafic melt reduces the preserved strain in mantle olivine.
#McGillUniversity #Mantle #EBSD #Xenolith #Lithosphere #Olivine -
Wednesday, early afternoon posters at #AGU23
MR31B-0084 Effects of melt-rock interactions on deformation fabrics and rock physical properties in the shallow mantle lithosphere
James Kirkpatrick presenting, but this is the the M.Sc. work of Arvid Gonzalez (now core-logging in n. QC). Other authors are myself and Caroline Seyler (U. Minnesota).Arvid found that infiltrating mafic melt reduces the preserved strain in mantle olivine.
#McGillUniversity #Mantle #EBSD #Xenolith #Lithosphere #Olivine -
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A piece of the mantle: a spinel lherzolite xenolith from the Canadian Cordillera. Clear olivine, brown orthopyroxene, bright green chromian clinopyroxene and opaque (black) spinel. Plane polarized light, it's a bit thicker than standard. The mantle is beautiful. #thinSectionThursday #xenolith #mantle #geology
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Rock on the beach at Barnum Point, Camano Island, WA. Looks like a granodiorite peppered with xenoliths. Igneous petrologists chime in. Likely weathered out of the till that caps the bluffs or a dropstone from floating ice on marine water incursion during the Everson interstade. Source rock provenance not known. Ref. Geologic map of the Juniper Beach 7.5-minute quadrangle, WDGER Geologic Map GM70. #geology #igneous #xenolith #iceage #glaciation #intrusive #PNW #washingtonstate #CamanoIsland
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Rock on the beach at Barnum Point, Camano Island, WA. Looks like a granodiorite peppered with xenoliths. Igneous petrologists chime in. Likely weathered out of the till that caps the bluffs or a dropstone from floating ice on marine water incursion during the Everson interstade. Source rock provenance not known. Ref. Geologic map of the Juniper Beach 7.5-minute quadrangle, WDGER Geologic Map GM70. #geology #igneous #xenolith #iceage #glaciation #intrusive #PNW #washingtonstate #CamanoIsland
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X is for Xenolith (and Xenocryst)
“A xenolith ("foreign rock") is a rock fragment (country rock) that becomes enveloped in a larger rock during the latter's development and solidification. In geology, the term xenolith is almost exclusively used to describe inclusions in igneous rock entrained during magma ascent, emplacement and eruption. Xenoliths may be engulfed along the margins of a magma chamber, torn loose from the walls of an erupting lava conduit or explosive diatreme or picked up along the base of a flowing body of lava on the Earth's surface. A xenocryst is an individual foreign crystal included within an igneous body. Examples of xenocrysts are quartz crystals in a silica-deficient lava and diamonds within kimberlite diatremes.”
~ From WikipediaSee more: https://blogs.agu.org/georneys/2011/05/18/geology-word-of-the-week-x-is-for-xenolith/