Mastodawn

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

Bill Minarik Apr 2

Biotite replacing garnet, from the Willoughby area of the Vermont Appalachians.

#ThinSectionThursday #Vermont #Geology #Metamorphism

John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿Apr 2

#ThinSectionThursday 🔥 Hot off the microscope this morning! 🤓 This may look dull, but the big clear (grey) grain with faint WSW-ENE parallel lines, on the right hand side of the image is a shocked quartz (produced by a meteorite impact).

The smaller greenish (orange) grain to the left is epidote. All the fragmental grains here been cemented together by turbid brown albite. From the enigmatic Stac Fada unit, (Proterozoic), in NW Scotland.

More info in Alt text.

#Geology #StacFada #Impact

Mineralogical Society of America Mar 26

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

Bill Minarik Mar 26

Titanite encircling illmenite in an amphibolite-facies metabasalt.

#ThinSectionThursday #Metamorphic #Titanite

Mineralogical Society of America Mar 19

Thin Section Thursday! Rapid growth of olivine in a basalt experiment. Features skeletal branching (thicker, higher birefringence) and progressive infilling (lower birefringence domains). Crystal is about 1mm in size. XPL Contributed by Thomas Shea, Univ. of Hawai’i #thinsectionthursday

Andrea Koziol Mar 12

Thin Section Thursday! Mica and Quartz in gneiss, XPL, gypsum plate inserted. Contributed by Bernhard Seubert.
Y#thinsectionthursday #ThinSectionThursday

Dr. Andrea Koziol Mar 12

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 America Mar 12

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 Minarik Mar 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