Geological Society of Washington
@geolsocwash
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Yep, that’s how GSW presidents do snow. ❄️🎿
Larry Meinert, PhD cross country skis on the National Mall today. Six inches of snow fell in D.C. @capitalweather
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RT @newscientist: Preserved footprints in Kenya appear to record two different species of ancient humans walking over the same muddy lakesh…
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Happy Birthday P.J.!
December 3, 1933, birthday of chemist Paul Jozef Crutzen, he coined the term #Anthropocene to describe the human impact on Earth's history 🌍🌡️
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The Bledug Kesongo mud volcano in Indonesia 🌋
Second eruption today of Bledug Kesongo in Indonesia. Another violent eruption occurred at ~16:30 this afternoon following from the spectacular eruption this morning.
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🎳🤔
A petrified "Buried Forest" in Carbon County? Not quite! What looks like the apparent ends of petrified logs are the cross-sections of giant balls of rock commonly known as cannonball concretions. Learn how this GeoSight was formed here– #utahgeology
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RT @EGU_TS: 📢Tectonic Modelling Tuesday #102 - with analog work by @PabloGranado9 & co. (@IRGeomodels @Univ @UniBarcelona OMV AUSTRIA), on…
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Join us on Wednesday, Dec. 4, for the Presidential Address by Dr. DANIEL DOCTOR @USGS "Allegory of the Cave, redux: perception and reality in karst science" Where? AGU, 2000 Florida Ave NW, DC Or register online 7:30 pm🧀🍷🫕🍻Talk: 8:00 pm (GMT-5)
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RT @Geology_History: December 2, 2014, died #OTD geophysicist Don L. Anderson. His seismic research helped advance our understanding of t…
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Smart-alecky subduction🤸♂️#tectonosaults
... geodynamic modelling sometimes gives funny results. Trying to get some continental collision going, but not quite there yet 🏔️👀
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#careersingeology ⚒️🌊🛰️
Join us on @springpod for a virtual work experience programme that will introduce ages 13+ to the wonderful world of geology and show them how a career in geosciences can help address crucial problems. The programme will run until April 2025. Learn more:
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RT @ExploreCosmos_: Black auroras, sometimes referred to as "anti-auroras," are rare and intriguing phenomena that appear as dark patches,…
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RT @EarthSciCam: Looking for #PhD opportunities in #IgneousPetrology? 🌋Feel free to reach out to our researchers to discuss possible projec…
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RT @MaryAnthracite: A geologic cross-section in a movie!? 😍From the classic original Godzilla (1954), in Japanese with subtitles, no Raymon…
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Triboluminescence
On Oct. 27, Chinese astrophotographer Shengyu Li captured rare blue flashes during an avalanche on Mount Xiannairi, possibly caused by "triboluminescence", light generated by friction during ice fragmentation. Triboluminescence is a phenomenon where light is emitted when certain materials are fractured, scratched, or rubbed. It occurs due to the breaking of chemical bonds or the sudden separation of surfaces, which can create electrical charges. These charges cause ionization of the surrounding air or excitation of the material itself, leading to visible light emission. The exact cause is not fully understood, but it's often attributed to rapid charge separation and recombination, which produces a burst of light. When ice breaks apart, friction or shock can release similar flashes. In the case of avalanches, the intense fragmentation and collision of ice could explain the observed blue flashes. The observation in China adds a unique example, as this may be one of the first documented cases of triboluminescence during large-scale natural events like avalanches. 💙💙 Example: Crushing sugar crystals or Wint-O-Green Lifesavers in the dark can produce bluish flashes.
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RT @Geology_History: November 26, 1835, HMS Beagle leaves Tahiti for New Zealand where Charles #Darwin will eventually visit earth's larges…
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Volcanism east of Mt. Rainier? "Ding ding ding, that works!"🛎️
New video. Filmed in October. Bumping River Tuff via @YouTube
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Happy Birthday Esther🎂🐚
November 24, 1895, birthday of American paleontologist Esther Richards Applin. When she suggested that microfossils could be used in stratigraphy she was told "it can’t be done” 🦠🔬
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RT @scottforteacher: Really excited for this #FossilFriday, just found this one the other day and my jaw dropped. Largest goniatite I’ve ev…
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