Jan Varga

Geoscientist, PhD student | metamorphic petrology

[Geology Tweets @GeologyTime]

Beautiful Garnet specimens from various pegmatites around the Harts Range region in the Northern Territory, Australia.

Photo by: Patrick Gundersen

#minerals #crystals

[Tom Raimondo @ROKmondo]

Straight from the top of my (gneiss) dome...

Our new JMG paper on gneiss dome formation in an intraplate orogen. Congrats to @Jan_Varga_Geo for rockin' the microphone with PhD paper #2!

And that's probably enough 90s Freestyler references. Find it here: https://t.co/gs7QE4c4Kx

[Jan Varga @Jan_Varga_Geo]

@GeostatsGuy 🙋‍♂️

[Tom Raimondo @ROKmondo]

Great to see @Jan_Varga_Geo's PhD work lighting up the Adelaide city centre on a huge scale! As @micROCKScopica always says, earth without art is just eh! #eARTh

[Cin-Ty Lee @CinTyLeeEarth]

Biotite mica from a pegmatite in Maine. It speaks for itself. #geology #MineralMonday

[Peter Haines @PeterHainesGeo]

Raindrop imprints - common on muddy surfaces today but hard to preserve in the geological record. Only seen a few convincing examples in a long career looking at sedimentary rocks. Early Cambrian Octy Formation, Georgina Basin, Australia, 1988.

[History_of_Geology @Geology_History]

#GeologyFunny

[Tom Raimondo @ROKmondo]

Monazite + melt = tasty textures (but potentially misleading ages) 🤔

Check out our new @UniversitySA #STEM, @UniSAFII and @MQEarthEnv paper in Chemical Geology. Read for free here: https://t.co/qwslv4LEdw

[Jamie Cutts @JamieCutts_Geo]

For my last #stonesathome coaster, a garnet-peridotite from Norway. This sample of the sub-continental lithospheric mantle formed at 2.7 BILLION years ago (Lu-Hf garnet age) at ~350 km depth! #teamgarnet ftw!

[Tim #ToriesOut Johnson 🇦🇺 🇬🇧 🇺🇦 🇪🇺 @Wonkiergruff1]

Another booby-dazzler for #StonesAtHome...

[Cin-Ty Lee @CinTyLeeEarth]

Neptunite, a rare sodium, lithium and titanium-bearing phyllosilicate found in hydrothermally altered blueschist-serpentinite melanges, mostly in California. Ti can be fluid mobile. #geology #mineral #gemstone #stonesathome

[Bénédicte Cenki @Cenki_Benedicte]

Do you like the movie ?...then you'll love our Geology article : Strain and retrogression partitioning explain long-term stability of crustal roots in stable continents (https://t.co/r022dCE7FO) #MSCA #H2020 @GeoMontp @umontpellier @sydneyunigeo @EarthByteGroup @Sydney_Uni

[Clare Warren @geologyclare]

Reaction rims on cm-sized garnets in an amphibolite from Halland, Sweden. #Metamorphicmonday.

[Tom Raimondo @ROKmondo]

How many PhDs does it take to solve a #shearzone?

Fond memories of this central Australia fieldtrip to the very melty Gough Dam Shear Zone, now immortalised in print.

New GEOLOGY paper from @MQEarthEnv & @UniversitySA out now @geosociety: https://t.co/AWZa1lA2Ra

[Dr. Alissa Kotowski @ajk_talcsrocks]

Starting off #metamorphicmonday with a muuuuch better kind of #corona ...

Beautiful #eclogite pods with #glaucophane reaction rims, surrounded by #blueschist matrix ... another stunner from Greece! 😍👌🏻

[Tom Raimondo @ROKmondo]

We've taken #StonesAtHome to the next level - helping our @UniversitySA students make their first geological map at the world-class #HallettCove Conservation Park, all from the safety of their own home. Full vid of our virtual field trip available here: https://t.co/96UHMI6Oxt

[Tom Raimondo @ROKmondo]

Our #hotrocks study led by @alicia_pollett featured in the latest edition of #UniSANews - Antarctic ice sheets could be at greater risk of melting than previously thought 🌏🧊🔥: https://t.co/ReL9l8RHr6

[Traveling Geologist @travelinggeolog]

A sample from the #granulite - #eclogite transition near #Bergen #Norway that perfectly illustrates the reaction of #plagioclase + #orthopyroxene -> #garnet + #clinopyroxene (#omphacite).
Sample from @chrisfpclark.

[Jan Varga @Jan_Varga_Geo]

Cambrian layered #ultramafic intrusive #rocks of NW Tasmania are a source of heavy #chromite so panning the local stream picks this up nicely #SGGMP19 #Tasmania #geology

[Jan Varga @Jan_Varga_Geo]

Last day of #SGGMP19 no shortage of ultra mafic rocks or views 😎⛏️⛰️ #cradlemountain #tasmania #geology