Andrea Koziol5d ago
Thin Section Thursday! Mica and Quartz in gneiss, XPL, gypsum plate inserted. Contributed by Bernhard Seubert.
Y#thinsectionthursday #ThinSectionThursday
Dr. Andrea Koziol5d ago
Thin Section Thursday! Mica and Quartz in gneiss, XPL, gypsum plate inserted. Contributed by Bernhard Seubert.
You can contribute too! Send image(s) and short explanation to akoziol1 at udayton dot edu. #thinsectionthursday
Mineralogical Society of America5d ago
Thin Section Thursday! Mica and Quartz in gneiss, XPL, gypsum plate inserted. Contributed by Bernhard Seubert. You can contribute too! Send image(s) and short explanation to akoziol1 at udayton dot edu. #thinsectionthursday
Bill MinarikMar 5

Perthite, in a fayalite-hastingsite hypersolvus granite, Cauro-Bastelica Complex, Tolla dam, Corsica

The minerals crystallized from melt at high temperature and water-poor conditions.

#ThinSectionThursday #Minerals #Corsica #Granite

Dr. Andrea KoziolMar 5
Thin Section Thursday!
Sphalerite crystal: Fe-poor zoned sphalerite crystal in thin section (PPL) - ID verified by microprobe analysis. Photo by Ingrid Kjarsgaard (c)
You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday
Mineralogical Society of AmericaMar 5
Thin Section Thursday! Fe-poor zoned sphalerite crystal in thin section (PPL) - ID verified by microprobe analysis. Photo by Ingrid Kjarsgaard (c) You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday
John Faithfull 🌍πŸ‡ͺπŸ‡ΊπŸ΄σ §σ ’σ ³σ £σ ΄σ ΏπŸ§‘βœŠπŸ»βœŠπŸΏFeb 26

#ThinSectionThursday Here's some lovely zoned biotite crystals, slightly kinked and intertwined during magmatic transport and cooling, in this minette dyke rock from St Hellier in Jersey. Field of view about 2mm wide. Sample in the Hunterian collections, University of Glasgow.

#Geology #Microscopy #Lamprophyre #ChannelIslands

Mineralogical Society of AmericaFeb 26
T.S. Thursday: 2.8 Ga Granodiorite from the Beartooth Mtns, MT in crossed polars and cathodoluminescence. In CL the red zone between microcline and plagioclase is a fine-grained myrmekite (plagioclase and quartz intergrowths). Contributed by Darrell Henry. #thinsectionthursday
Mineralogical Society of AmericaFeb 19
Thin Section Thursday! Blue Osumilite in an ~9 Ma rhyolite lava from Jackson Hole, Wyoming. Plane polarized light. Mineral confirmation by Raman spectroscopy.Contributed by Matt Brueseke. Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday
Bill MinarikFeb 12

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.

#ThinSectionThursday #Kimberlite #Xenolith #Mantle