#thinsection
LightNews LightNews
calamitaman.bsky.social
Another folded clinopyroxene-quartz layer

#geology #thinsection
Microphoto of a folded rock
June 4, 2025 at 11:18 AM
colinmacpherson.bsky.social
Is #ThinSectionThursday a thing on here? Regardless, here is an olivine gabbro xenolith from Chile to brighten up the morning. #thinsection #geology #volcano #petrology
Cross polarised light view of an olivine gabbro from Chile
November 14, 2024 at 9:31 AM
nishimoto.rocks
Hornblende in "Kuro-Kurama" - diorite or gabbro from Kurama, Kyoto, Japan. FOV=ca.2 mm #thinsection #petrology #petrography #polarizingmicoscope
May 22, 2026 at 7:13 AM
calamitaman.bsky.social
Again, my new love: orthoamphibole + olivine contact metamorphosed serpentinite

#geology #thinsection #petrography #MineralMonday #minerals
contact metamorphosed serpentinite
June 16, 2025 at 9:04 AM
calamitaman.bsky.social
Another beautiful #mylonite derived from a #granite intruded in a shear zone. The big brown grains are #tourmaline.

FOV 3 mm CPL
#thinsection #geology
⚒️
March 21, 2025 at 11:46 AM
calamitaman.bsky.social
A rocket in space according to normal people

A tourmaline grain surrounded by deformed quartz and feldspar according to geologists

⚒️ #geology #thinsection
A tourmaline grain in a metagranite
January 26, 2026 at 11:53 AM
nishimoto.rocks
Muscovite in pegmatite, Nishio, Aichi Japan.
FOV=ca.5 mm #thinsection #petrology #petrography #polarizingmicoscope
April 12, 2026 at 12:20 PM
nishimoto.rocks
Stilpnomelane schist from Nagatoro, Saitama, Japan; OPL, FOV=ca.1 mm #thinsection #petrology #petrography #polarizingmicoscope
スティルプノメレン片岩の偏光顕微鏡写真
July 25, 2025 at 6:47 AM
calamitaman.bsky.social
Sometimes it is nice to deal with a colorful rock

FOV 3 mm
diopside hornfels

#geology #contactmetamorphism #thinsection
⚒️🧪
December 11, 2024 at 10:25 AM
kristinadunkel.bsky.social
It's been a while, but I just found this "spherulitite" thinsection from the Oslo rift area in our teaching collection and thought that's my sign to contribute to #ThinsectionThursday again! 😃
September 4, 2025 at 1:03 PM
nishimoto.rocks
Clinozoisite in "Bethel White" - Bethel granite from Bethel, Vermont, US. FOV=ca.2 mm #thinsection #petrology #petrography #polarizingmicoscope #岩石 #偏光顕微鏡写真
May 12, 2026 at 7:33 AM
calamitaman.bsky.social
Hey marble! Tell me you are a mylonite without telling me you are a mylonite!

⚒️ #geology #thinsection #petrography
August 2, 2024 at 2:28 PM
martincooke.bsky.social
Land of Fire and Ice (2024)
Acrylic on canvas
80 x 60cm
#ArtAdventCalendar #AbstractArt #Art #Painting #AbstractPainting #Iceland #Geology #ThinSection
Abstracted representation of geological processes. Multitude of cream, yellow, orange, salmon pink and red linear marks forming a mesh, against a blue background with hint of an icy horizon.
December 20, 2024 at 8:53 AM
calamitaman.bsky.social
There's plenty of fish in the Ocean

biotite-fishes happily swimming to the east in a sea of recrystallized quartz and feldspar.
FOV 3 mm CPL

#geology #thinsection #mylonite #granite
mylonitic granite
June 6, 2025 at 8:19 AM
calamitaman.bsky.social
If you are a geologist, this is a tourmaline crystal in a metagranite.

If you are a normal person, this is a rocket flying through space 😂

⚒️ #geology #petrography #thinsection #minerals #tourmaline
A tourmaline crystal oddly resembling a rocket because of the 'flames' of muscovite coming off it
April 7, 2025 at 10:01 AM
calamitaman.bsky.social
#ThinSectionThursday

Barroisite - phengite - garnet schist, a retrogressed #eclogite from the Sanbagawa Belt of Japan

⚒️
#geology #thinsection #minerals
Minerals under the microscope Minerals under the microscope
July 24, 2025 at 7:27 AM
colinmacpherson.bsky.social
For #ThinSectionThursday a rock from my undergraduate dissertation mapping area (Ardnamurchan Centre 1 volcano) showing clots of plagioclase and clinopyroxene with interstitial aphyric glass (left half) in microphyric pitchstone (right half). 😍 #thinsection #geology #volcano #petrology #scotland
December 12, 2024 at 9:58 AM
calamitaman.bsky.social
A Sanbagawa eclogite with omphacite (dark green, above) being cannibalized by light blue amphibole (probably winchite).

FOV: 3 mm
Sanbagawa metamorphic belt, Japan.
⚒️🧪
#geology #thinsection #petrography #eclogite
Eclogite as seen under the microscope.
November 29, 2024 at 12:07 PM
nishimoto.rocks
"Kannabe Ao-mikage" andesite from Toyooka, Hyogo, Japan.
FOV=ca.5 mm #thinsection #petrology #petrography #polarizingmicoscope #岩石 #偏光顕微鏡写真
May 3, 2026 at 6:08 AM
nishimoto.rocks
"Verde Lapponia", fuchsite-bearing quartzite from northern Norway. FOV=ca.5 mm #thinsection #petrology #petrography #polarizingmicoscope
August 3, 2026 at 5:49 AM
calamitaman.bsky.social
I should remember this sample when #PrideMonth starts

White mica crystals surrounded by wollastonite in a marble

#geology #petrography #muscovite #thinsection
White mica crystals in marble in thin section White mica crystals in marble in thin section
May 13, 2025 at 12:58 PM
calamitaman.bsky.social
#RockInTuesday strained K-feldspar grain in deformed granite, surrounded by myrmekites aka branching rods of quartz surrounded by feldspar.

#geology #thinsection #myrmekite
myrmekites around K-feldspar, FOV 3 mm, CPL light
April 22, 2025 at 9:37 AM
calamitaman.bsky.social
Crenulation cleavage in a very low-grade sequence of limestone and marl. Calcare selcifero Fm., Venturina, Livorno, Italy

#crenulationcleavage #structuralgeology #geology
#thinsection

⚒️
July 18, 2024 at 8:08 AM
calamitaman.bsky.social
Microphoto of albite grains syntectonic to crenulation cleavage formation (you can see folds with higher amplitude inside albite with respect to the surrounding matrix). FOV 3 mm, crossed polars + gypsum plate

⚒️ #geology #minerals #thinsection #tectonics
rock in thin section
January 19, 2026 at 10:28 AM
nishimoto.rocks
Phlogopite basalt from Kurayoshi, Tottori, Japan; FOV=ca.5 mm
金雲母玄武岩(鳥取県倉吉市産)の偏光顕微鏡写真
#thinsection #petrology #petrography #polarizingmicoscope
August 10, 2025 at 8:22 AM