Igneous Petrology

All things igneous ~ magma ~ subduction ~ MORB ~ OIB ~ lava ~ petrology ~ volcanoes ~ tuff ~ volatile ~ explosive ~ geochemistry ~ ignimbrite ~ porphyry ~

[Igneous Petrology @ign_petrology]

Crazy K-feldspar megacrystic granite in a friend's kitchen worktop. Never seen that many before. Nice enclaves too!

[Wenrong Cao @Wenrongc]

Made a thin section projector with an old camera lens. Projected hornblende grain on the wall having a size of a pen. cleavage clear. And the light is polarized to show interference colors.

[Johan lissenberg @LissenbergJohan]

The cool thing about reactive porous flow is that is can be cryptic: nothing in the PPL image that suggests the wild compositional variations revealed by the element map.

[Johan lissenberg @LissenbergJohan]

Corundum beating zircon in @MineralCup is like the Brexit vote: everyone knows that zircon is better, but people vote for corundum just because they can.

[Cin-Ty Lee @CinTyLeeEarth]

Trying to not think about what’s going on in the world right now so I made another bad micro video. Where does copper for our electrical grid come from? And meet my pelican. #scicomm #geology #copper

[Igneous Petrology @ign_petrology]

@CinTyLee1 This is great - looking forward to more soon!

[Igneous Petrology @ign_petrology]

@Schoolseismo @raspishake That’s cool! You could estimate altitude and location from your data

[Igneous Petrology @ign_petrology]

Amazing footage of the #Etna flank eruption https://t.co/BiXHESpsJG

[Igneous Petrology @ign_petrology]

@AZGeology Awesome. Do you have a more specific location?

[Igneous Petrology @ign_petrology]

🤣rear arc weirdos. Don’t get us started! https://t.co/ZAq8qJCwRZ

[Three Sisters Volcanoes @3SistersVolcano]

@plinianMB @KilaueaMountain I was hoping no one would bring that up. But she hasn't erupted dacite. Plus any volcano can produce dacite bulk composition magma.. @GlacierPeak and I are the only Cascade arc volcanoes capable of erupting rhyolite (*rear arc weirdos like Medicine Lake and Newberry don't count)

[Igneous Petrology @ign_petrology]

I am so torn. Gotta be rhyolites, all day every day 🏔🏔🌋 https://t.co/fmTcg43Mme

[Three Sisters Volcanoes @3SistersVolcano]

Oh that's cute, @KilaueaMountain produced a bit of andesite lava (57% SiO2). Wake me up when you actually produce real silicic magma
Check out my much more impressive rhyolite/obsidian (74% SiO2) lava flow from 2,000 yrs ago. It's 160 ft (50m) thick!! Your flows are #weak (<20ft)

[USGS Volcanoes🌋 @USGSVolcanoes]

Activity in the lower East Rift Zone ramped up overnight and this morning. During an overflight, HVO scientists observed a very active fissure 20. Channelized lava flows originating from a line of low fountains are moving to the east-southeast.

[Igneous Petrology @ign_petrology]

Don’t think we’re going ‘soft’.... but these seds are pretty cool https://t.co/uHn0Lg6zjo

[jaime s. sincioco @jaimessincioco]

Seismites, Lisan formation of deformed interclast soft-sedimentary structures formed by earthquakes near the time of initial deposition that help to understand the earthquake history of the Dead Sea basin - Learning Geology/John Zana's Photo #Seismites #DeadSea #LisanLake

[Igneous Petrology @ign_petrology]

Majestic! Look at that zoning 🤤 https://t.co/P2zosYLD7u

[Igneous Petrology @ign_petrology]

#Igneous #Rocks @tomgauld

[Igneous Petrology @ign_petrology]

This is truly terrifying and amazing at the same time! NEVER screw with a lahar - it’s a battle you cannot win 🌋🌊 https://t.co/S8NaCUx973

[Rubén Esteban Pérez @Ruben_ICOG]

Me ha llegado este video. No se su ubicación, pero la torrentera de barro y piedras (eso parece) es espectacular. Y el susto de los senderistas también.

[Igneous Petrology @ign_petrology]

I was sure I parked somewhere around here https://t.co/tiM2zkDXJl

[Adam Kent @geowhateverist]

All that lava that we see thrown into the air at #Kilauea is "spatter" and it falls and builds up spatter "cones" or "ramparts". This is what the inside looks like (from Saudi Arabia) - you can see how each glob that falls is flattened and glues itself to the lava below.

[Igneous Petrology @ign_petrology]

@DrStanStan It’s hard to get a geologist to wear clothes like that even when it’s actually appropriate/required - important meetings, weddings, graduations, funerals... you can guarantee some geochemist will turn out in field boots and cargo shorts smh ⚒

[Igneous Petrology @ign_petrology]

@thebiologistisn @DrRubidium @MicroEarthSci Right! If you average over the course of a career, they’re actually - average stress, average pay