#thinsectionthursday — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #thinsectionthursday, aggregated by home.social.
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Thin Section Thursday!
Spinifex texture (olivine) in a komatiite. XPL. Photo by Ingrid Kjarsgaard (c)
You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday -
Thin Section Thursday!
X-ray colored map (red=magnesium, green=Ca, blue=Al) of a 'daisy' plagioclase from a Kohala basalt (Hawai'i). Image is ~3 cm across. Zoning in Ca and Al & olivine intergrown between the plag 'petals'. Contributed by Thomas Shea.
#thinsectionthursday #plagioclase -
Thin Section Thursday!
X-ray colored map (red=magnesium, green=Ca, blue=Al) of a 'daisy' plagioclase from a Kohala basalt (Hawai'i). Image is ~3 cm across. Zoning in Ca and Al & olivine intergrown between the plag 'petals'. Contributed by Thomas Shea.
#thinsectionthursday #plagioclase -
Thin Section Thursday!
Cryolite (Na3AlF6)-Greenland's forgotten "white gold" crystal displaying twinning. (cross polarized light). Ivittuut mine was once the world's only commercial source of natural cryolite. Contributed by Mohsin Raza.
#thinsectionthursday -
Thin Section Thursday!
Cryolite (Na3AlF6)-Greenland's forgotten "white gold" crystal displaying twinning. (cross polarized light). Ivittuut mine was once the world's only commercial source of natural cryolite. Contributed by Mohsin Raza.
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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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Thin Section Thursday!
Photo and caption by Nate Andrew Sullivan, UG student at James Madison Univ.:
Alkali Feldspar Granite. Quartz, and alkali feldspar are the common minerals in it. #thinsectionthursday #granite -
Thin Section Thursday!
Photo and caption by Nate Andrew Sullivan, UG student at James Madison Univ.:
Alkali Feldspar Granite. Quartz, and alkali feldspar are the common minerals in it. #thinsectionthursday #granite -
Thin Section Thursday! Image & caption by Nylah Wilson, UG student at James Madison University. Anorthosite primarily formed of plagioclase with albite and carlsbad twinning, olivine, and interstitial clinopyroxene.
#thinsectionthursday #anorthosite #plagioclase -
Thin Section Thursday! Image & caption by Nylah Wilson, UG student at James Madison University. Anorthosite primarily formed of plagioclase with albite and carlsbad twinning, olivine, and interstitial clinopyroxene.
#thinsectionthursday #anorthosite #plagioclase -
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.
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Thin Section Thursday! Image & caption: Nicole Mueller, UG student at James Madison University. Dhofar 287 is a lunar mare basalt meteorite. Note orthopyroxene (white crystals) and plagioclase (dark crystals) and clinopyroxene (the bright crystals). #thinsectionthursday #lunarmeteorite
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Thin Section Thursday! Image & caption: Nicole Mueller, UG student at James Madison University. Dhofar 287 is a lunar mare basalt meteorite. Note orthopyroxene (white crystals) and plagioclase (dark crystals) and clinopyroxene (the bright crystals). #thinsectionthursday #lunarmeteorite
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Thin Section Thursday! Contributed by Sean Arthur, UG student at James Madison University.
Garnet–wollastonite skarn. Isotropic garnet (black in XPL) contrasts sharply with high-order interference colors of wollastonite.
#thinsectionthursday #ThinSectionThursday #Petrography #Skarn #Geology -
Thin Section Thursday! Contributed by Sean Arthur, UG student at James Madison University.
Garnet–wollastonite skarn. Isotropic garnet (black in XPL) contrasts sharply with high-order interference colors of wollastonite.
#thinsectionthursday #ThinSectionThursday #Petrography #Skarn #Geology -
Thin Section Thursday! Image & caption by Misha Sarco, UG student at James Madison University. A porphyritic basalt from a lava flow. It contains plagioclase phenocrysts in a fine-grained groundmass, with oscillatory zoning and albite twinning. #basalt #plagioclase #thinsectionthursday
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Thin Section Thursday! Image & caption by Misha Sarco, UG student at James Madison University. A porphyritic basalt from a lava flow. It contains plagioclase phenocrysts in a fine-grained groundmass, with oscillatory zoning and albite twinning. #basalt #plagioclase #thinsectionthursday
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Thin Section Thursday! Image and caption contributed by Bjorn Isaacson, UG student at James Madison University. Eclogite: Starting as mafic basalt, through high P &T this rock reached the eclogite metamorphic facies creating the large rich isotropic garnets. #thinsectionthursday #eclogite
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Thin Section Thursday! Image and caption contributed by Bjorn Isaacson, UG student at James Madison University. Eclogite: Starting as mafic basalt, through high P &T this rock reached the eclogite metamorphic facies creating the large rich isotropic garnets. #thinsectionthursday #eclogite
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Thin Section Thursday! Photo and caption by Matthew Cruz, UG student: Unakite is a metamorphic rock primarily composed of Epidote, Orthoclase, and Quartz. The vibrant colors (XPL) come from the interference colors of Epidote. #unakite #thinsection #thinsectionthursday
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Thin Section Thursday! Photo and caption by Matthew Cruz, UG student: Unakite is a metamorphic rock primarily composed of Epidote, Orthoclase, and Quartz. The vibrant colors (XPL) come from the interference colors of Epidote. #unakite #thinsection #thinsectionthursday
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Thin Section Thursday! Photo and caption by Peyton Ellen Kaufman, UG student at James Madison Univ.: Plane light photo. glaucophane schist, Blueschist Facies. It is likely the rock formed in a subduction zone (likely ocean-continent subduction). #thinsectionthursday #glaucophane
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Thin Section Thursday! Photo and caption by Peyton Ellen Kaufman, UG student at James Madison Univ.: Plane light photo. glaucophane schist, Blueschist Facies. It is likely the rock formed in a subduction zone (likely ocean-continent subduction). #thinsectionthursday #glaucophane
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Thin Section Thursday! Photo and caption by Chloe Morgan, UG student at James Madison Univ.: PPL picture of a chondrite meteorite showing a chondrule, a round silicate inclusion. The chondrule exhibits a barred texture due to rapid cooling. #thinsectionthursday #chondrule
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Thin Section Thursday! Photo and caption by Chloe Morgan, UG student at James Madison Univ.: PPL picture of a chondrite meteorite showing a chondrule, a round silicate inclusion. The chondrule exhibits a barred texture due to rapid cooling. #thinsectionthursday #chondrule
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Thin Section Thursday! contributed by Reagan Elizabeth Davis, UG student at James Madison University. The rock pictured is a Kyanite Quartzite gathered near Ogilby California. (XPL) Kyanite shows low to moderate interference colors, and bladed form. #ThinSectionThursday #kyanite
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Thin Section Thursday! contributed by Reagan Elizabeth Davis, UG student at James Madison University. The rock pictured is a Kyanite Quartzite gathered near Ogilby California. (XPL) Kyanite shows low to moderate interference colors, and bladed form. #ThinSectionThursday #kyanite
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Image and caption from Luke Meaney, James Madison University in Harrisonburg, VA. Hornblende andesite from Mt. Shasta, CA. A near perfect Hornblende in Cross-polarized light. See the third order pinks, blues, greens, and yellows so vibrant, Picasso would approve. #thinsectionthursday #hornblende
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Image and caption from Luke Meaney, James Madison University in Harrisonburg, VA. Hornblende andesite from Mt. Shasta, CA. A near perfect Hornblende in Cross-polarized light. See the third order pinks, blues, greens, and yellows so vibrant, Picasso would approve. #thinsectionthursday #hornblende
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Thin Section Thursday! Plagioclase and pyroxene in basalt (Cross polarized light). Pyroxenes are mostly brightly colored, plagioclases are gray. Contributed by Bernhard Seubert. You can contribute too! Send image(s) and short explanation to akoziol1 at udayton dot edu. #thinsectionthursday
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Thin Section Thursday! Plagioclase and pyroxene in basalt (Cross polarized light). Pyroxenes are mostly brightly colored, plagioclases are gray. Contributed by Bernhard Seubert. You can contribute too! Send image(s) and short explanation to akoziol1 at udayton dot edu. #thinsectionthursday
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A garnet muscovite schist in cross-polarized light. Horizontal field of view ~ 4cm.
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A garnet muscovite schist in cross-polarized light. Horizontal field of view ~ 4cm.
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Thin Section Thursday! Bornite intergrown with chalcopyrite, Reflected Light. Photo by Ingrid Kjarsgaard (c) You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday
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Thin Section Thursday! Bornite intergrown with chalcopyrite, Reflected Light. Photo by Ingrid Kjarsgaard (c) You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday
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Biotite replacing garnet, from the Willoughby area of the Vermont Appalachians.
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Biotite replacing garnet, from the Willoughby area of the Vermont Appalachians.
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Thin Section Thursday! Coronitic and symplectite texture in a cpx-ilm-grt amphibolite from Precambrian basement of Southern Brasilia Orogen, city of Campinas - SP - Brazil. Shown in plane and cross-polarized light. Contributed by Helena Paiva. #thinsectionthursday
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Titanite encircling illmenite in an amphibolite-facies metabasalt.
