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Reposted by Vicky Veritas

Geology Johnson @geologyjohnson.bsky.social · 1d

Some 3.8 billion year old rocks from Isua, Greenland. See alt text for details. These are from a friends collection, sadly they are not mine. #Geology

Human hand holding a small ~ 5cm square lump of dark brown metamorphosed basalt that is composed of flowing lumpy shapes and masses of needle like brown crystals

human hand holding a ~2cm long piece of metamorphsed volcanic rock that is made of alternating black bands of magnetite and white-cream bands of feldspar and quartz.

human hand holding a ~2cm mass of grey brown fuchsite crystals which look like layered masses of needles.

human hand holding a ~3cm lump of grey brown metamorphosed basalt that is encrusted with masses of pea sized dark red garnets.

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Romain Tartese @romiche29.bsky.social · 1d

Delighted to see this paper out in @weareagc.bsky.social! We finally have a great journal where we can publish cosmochemistry papers that are free to read, and free to publish. No need to provide free labour to Elsevier, Wiley and co. so that they can make billions of $$$ and feed ChatGPT..

Advances in Geochemistry and Cosmochemistry @weareagc.bsky.social · 1d

New paper alert!

Tartèse et al. just published their new work in AGC:

"Petrogenesis of Néma 001, an alkali-rich meteorite from the acapulcoite-lodranite parent body"

Full free article available here: doi.org/10.33063/agc...

The cosmochemistry is well represented this week, thanks for your trust!

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Nadine, Haunter of Rocks 👻 @nadwgab.bsky.social · 1d

282 of #365Minerals 🧪⚒️

Tinaksite:
- A silicate mineral
- Forms in hydrothermally altered rocks
- Often associated with charoite
- Its name is based on its composition: titanium (Ti), sodium (Na), potassium (K), silicon (Si) #minerals

Diverging group of orange-brown prismatic tinaksite crystals (like a bundle of spaghetti) in white to pale lilac charoite with somne black sprays of aegirine. From Murunskii Massif, Irkutsk oblast, Russia.

Specimen on display in the Natural History Museum, London.

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Tim Fedak PhD @timfedak.bsky.social · 1d

A wonderful celebration of #GeodiversityDay in the Cliffs of Fundy UNESCO Global Geopark - ⚒️ see more and Like/Follow at: facebook.com/DrawingGeopa...

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Kevin Anchukaitis @thirstygecko.bsky.social · 2d

This is cool - new paper from Hali Kilbourne et al. 'Dating a Medieval Tsunami With Uranium-Series Techniques on Caribbean Corals' agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Dating a Medieval Tsunami With Uranium‐Series Techniques on Caribbean Corals

Uranium-series analyses provide dates for 15 annually banded coral skeletons on the low Caribbean island of Anegada A subset of the corals was likely washed ashore in a Puerto Rico Trench tsunami...

agupubs.onlinelibrary.wiley.com

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Vicky Veritas @vickyveritas.bsky.social · 1d

Love plane window geology! I “discovered” sand dunes in Nevada that I never knew were there!

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Robert Mahon @bedform.org · 1d

Every geologist

The Onion @theonion.com · 2d

Passenger Glued To Airplane Window Like It Fucking 1956 https://theonion.com/passenger-glued-to-airplane-window-like-it-fucking-1956-1832728158/

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Howard Lee @hlee.bsky.social · 1d

👀 Depleted sulfur 33 on the moon may indicate some kind of overturn exchanging materials between the surface & mantle under a thin atmosphere in the newborn moon 🧪⚒️

Astrobiology @astrobiology.bsky.social · 2d

Astrogeology and Astrochemistry: Apollo Samples From 1972 Reveal Exotic Sulfur Hidden In The Moon’s Mantle
astrobiology.com/2025/10/astr... #astrobiology #astrochemistry #Artemis #astrogeology

Astrogeology and Astrochemistry: Apollo Samples From 1972 Reveal Exotic Sulfur Hidden In The Moon’s Mantle - Astrobiology

When astronauts returned from NASA’s final Apollo Moon mission in 1972, some of the samples they collected were sealed and carefully stored away

astrobiology.com

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James Dalziel @j-dalziel.bsky.social · 1d

Seismologists & risk modellers are always aiming to better understand relationships between quakes on major faults. This Science article, based on Goldfinger et al. (2025), uses palaeoseismology to find possible stress triggering between the Cascadia subduction zone & northern San Andreas fault:

Big U.S. West Coast earthquakes could come as a one-two punch

Cascadia and San Andreas fault zones appear to generate synchronized earthquakes

www.science.org

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Zack Labe @zacklabe.com · 1d

September 2025 was the 3rd warmest September on record for our planet, following 2023 (1st place) and 2024 (2nd place). The last 12-months have been about 1.51°C above the 1850-1900 pre-industrial average.

Summary of month: climate.copernicus.eu/surface-air-... via @copernicusecmwf.bsky.social data

Orthographic map showing 2-m air temperature anomalies in September 2025 relative to a 1981-2010 baseline. This visualization shows North and South America. Most areas are warmer than average.

Orthographic map showing 2-m air temperature anomalies in September 2025 relative to a 1981-2010 baseline using ERA5 data. This visualization shows Africa, Europe, and western Asia. Most areas are warmer than average.

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Seismological Society of America @seismosocam.bsky.social · 1d

The field of #seismic #sensing techniques is evolving rapidly. Join us at the 2026 SSA topical conference to stay at the forefront of the changes: topical.seismosoc.org
#optical #seismology #hawaii ⚒️🧪

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Brandon Bishop @brandontbishop.bsky.social · 2d

Geodyamic-y question: How much would a volcanic arc subside after it shuts down, from both cooling of the underlying mantle/crust and conversion of any deep basaltic melts into eclogite?

Probably would only ve relevant in settings switching from a subduction zone to a transform boundary....

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Ferwen @ferwen.bsky.social · 1d

Stratigraphic and anatomical evidence for multiple titanosaurid dinosaur taxa in the Late Cretaceous (Campanian-Maastrichtian) of southwestern North America ⚒️🧪🦕

giw.utahgeology.org/giw/index.ph...

Stratigraphic and anatomical evidence for multiple titanosaurid dinosaur taxa in the Late Cretaceous (Campanian-Maastrichtian) of southwestern North America | Geology of the Intermountain We...

giw.utahgeology.org

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Dr. Kenna Harmony Rubin @kennarubin.bsky.social · 1d

Did you know that Earth's most & 2nd most powerful/explosive #volcanic #eruptions of the century were submarine? We are discussing both the 2022 Hunga Tonga-Hunga Ha'apai (pictured) & the 2012 Havre eruptions, both in the Kingdom of Tonga, this week in my Submarine volcanoes course at #URIGSO 🧪🌋🌊

Two true color satellite views of the rising and spreading tephra plume from the 2022 Hunga Tonga-Hunga Haʻapai eruption, from the geostationary satellite GOES-West. (a) Aerial emission linked with the volcanic activity on 13 January; (b) Ash plume emitted during the main eruption on 15 January. Red lines depict the coastline and the yellow triangle depicts the position of the HTHH volcano. Source: Barone, Letelier, Rubin & Karl (2022) Satellite Detection of a Massive Phytoplankton Bloom Following the 2022 Submarine Eruption of the Hunga Tonga-Hunga Haʻapai Volcano, Geophysical Research Letters, 49 (17) e2022GL099293; open access at https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022GL099293

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British Geological Survey @bgs.ac.uk · 2d

Extended seabed geology map of the Bristol Channel published 🗺️ 🌊

Renewable energy infrastructure, whether on- or offshore, requires an in-depth understanding and accurate characterisation of the underlying geology. 🧵

Extract of the BGS Seabed Geology 10k: Bristol Channel (v.2) digital map. Showing the three layers of the dataset (Seabed Substrate, Geomorphology and Structural Geology) draped over the hillshade derived from MB data acquired by the CHP.
Note that the legend only shows the features visible in the map extract.

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Nadine, Haunter of Rocks 👻 @nadwgab.bsky.social · 2d

281 of #365Minerals 🧪⚒️

Pollucite:
- A zeolite mineral
- An ore of caesium
- Forms in lithium rich granite pegmatites
- It's named after Pollux, a Greek mythological figure who was the brother of Castor (who gives his name to castorite/petalite, a commonly associated mineral) #minerals

A white, slightly translucent chunk of pollucite with a rough powdery looking texture. From Bernic Lake, Manitoba, Canada.

Specimen on display in the Natural History Museum, London.

A rough, flattened spherical crystal of pollucite, beige and translucent. From San Piero in Campo, Elba, Italy.

Specimen on display in the Natural History Museum, London.

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Ele Willoughby @minouette.bsky.social · 2d

For #spacetober_challenge day 8 prompt propulsion, my portrait of #mathematician, aeronautical #engineer, philanthropist & Cherokee ‘hidden figure’ of the space race: Mary Golda Ross (1908-2008).⁠ 🧪🐡🧮🔭👩🏻‍🔬 #histsci
⁠
Great-great-granddaughter of Chief John Ross, who was forced to lead his people on the

Linocut portrait of Mary Golda Ross looking over her shoulder in a gradient of green (at bottom) to gold (at top) surrounded by vehicles important to her career including P-38 Lighting fighter plane, and Agena rocket, important to Apollo missions in grey.

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Callan Bentley @callanbentley.bsky.social · 2d

A log, petrified with malachite + azurite. University of Texas at El Paso (UTEP), 2012. ⚒️

A big log sitting on concrete with a rock wall behind it and a scale pencil on top of it. The log is blue and green!

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Steven J. Gibbons @stevenjgibbons.bsky.social · 2d

I've only just realized that today is the 20th anniversary of the 2005-10-08 Kashmir earthquake. A horrific event - over 70,000 killed - I don't know if a final figure ever emerged. I spent years studying this event and its aftershock sequence.
en.wikipedia.org/wiki/2005_Ka...

2005 Kashmir earthquake - Wikipedia

en.wikipedia.org

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Ethan Baxter @ethanrockstory.bsky.social · 3d

⚒️🍎🧪🌋
Welp... it got a little dark by the time we found what we were looking for preserved in the ash from the 1790 tephra layer at Kilauea volcano. Geologist Christina Cauley will tell us the story of this historic eruption that changed Hawaii forever. Amazing!

youtube.com/shorts/53TPd...

We found something incredible persevered in the tephra layer of the 1790 Kīlauea eruption

YouTube video by Ethan Baxter's "Every Rock Has A Story"

youtube.com

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Ethan Baxter @ethanrockstory.bsky.social · 3d

⚒️🍎🧪
See where they measure the atmospheric concentration of CO2 and other greenhouse gases. Every Rock Has A Story (yup, there's a rock in this episode too!)

youtube.com/shorts/mvG9R...

See where atmospheric CO2 gets measured: Mauna Loa and Mauna Kea, Hawaii

YouTube video by Ethan Baxter's "Every Rock Has A Story"

youtube.com

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Brandon Bishop @brandontbishop.bsky.social · 3d

All US Geoscience Occupations, 2006: 266,100
All US Geoscience Occupations, 2025 (averaged thru Aug.): 282,806

Total increase: 16,706
Percent increase: 5.9%

Predicted increase 2006 to 2016: 51,346 jobs or 19%

Data to do these comparisons is hard to get.

2006 numbers from here:

www.americangeosciences.org

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Dr. Brendan Anderson @fossilsndcoffee.bsky.social · 3d

Day156 of photoshopping @lastweektonight.com 's #JohnOliver w/ fossils in the hopes that he saves the Paleontological Research Institution

John(H. sapiens) having a lovely time with the Paleozoic Pal of Isotelus gigas ⚒️

#trilobitetuesday #JohnOliverCoprolitasticShed #Paleontology #SavePRI #Cornell

John Oliver sitting on a rock having a conversation with a large brown plush of the trilobite Isotelus maximus

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Prof Phoebe Barnard @phoebebarnard.bsky.social · 3d

Rainforests create their own rain… eroding them destroys that alarmingly fast. They’re not just lungs of the planet, but a biotic pump of moisture, cooling, sustenance, life open.substack.com/pub/climatew...

Follow Alpha Lo of the Climate Water Project ericagies.bsky.social
@robdelaet.bsky.social

An intriguing behavior of global rain

an exercise

open.substack.com

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Callan Bentley @callanbentley.bsky.social · 4d

Cool frog.
The rock is not porphyritic though; It's amygdular (amygdaloidal).

The distinction: porphyritic texture involves big crystals surrounded by a mass of much smaller crystals. Amygdules are mineralized volcanic gas bubbles: fossil volcano burps.

Both can manifest as a polka dot pattern.
⚒️

Nina Willburger @drnwillburger.bsky.social · 5d

A marvellous #Egyptian #frog amulet, made of porphyry (height 1.2 cm).
Because of their numerous offspring, #frogs were considered a symbol of fertility.

Dating ca. 1295–1185 BC, New Kingdom.

📷Metropolitan Museum

🏺 AncientEgyptBluesky

A small frog-shaped amulet carved from dark reddish-brown porphyry, patterned with irregular white spots, shown in a crouching position against a plain light background.

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