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View of Hot Springs, Arkansas, from the top of the observation tower on North Mountain looking towards West Mountain.

Steeply dipping beds of the Stanley Shale and Hot Springs sandstone exposed behind a parking lot in Hot Springs, Arkansas

Photo of me along the Sunset trail on West Mountain at Hot Springs National Park amidst some outcrops of novaculite, a type of cryptocrystalline quartz. It is erosion resistant and holds up the ridge line here

Looking north along the Sunset trail on West Mountain at Hot Springs National Park amidst some outcrops of novaculite, a type of cryptocrystalline quartz. It is erosion resistant and holds up the ridge line here

#Geomorphology Week is ending, and I was lucky enough to get down to #HotSprings #NationalPark where 4,000 yr heated #groundwater rises to Earth’s surface via the Hot Springs #Fault, part of the Ouachita Orogeny. Ridges here are held up by cryptocrystalline quartz of the Arkansas Novaculite #Geology

Opportunity for "formal or nonformal educators who teach at the middle or high-school level that are experienced or new to the Great Lakes Literacy Principles.
"Stipends will be provided to offset costs of attendance and travel. "
🧪⚒️

The reason the Middle East has so much oil is the same reason it’s all stuck there now A continental collision trapped oil within what is today Iran. The same collision explains why that oil is trapped behind the Strait of Hormuz now

Fascinating new piece by @sipappas.bsky.social looking at the geology behind the geopolitics:

🧪

Late Glacial to Early Holocene Vegetation Reconstruction from the Wenas Creek Mammoth Site in Washington State The Wenas Creek Mammoth site pollen record, which extends from ∼20,000–10,000 cal yr BP, is significant given that few eastern Cascade paleoecological records span the Late Glacial to Early Holocen...

Happy #FossilFriday here is a wee climate paper that I coauthored. We found that 20kya eastern Washington was drying and warming up and chasing away all the pesky pine trees (ew, trees).

As usual with pleistocene stuff, my job was figuring out how old all the dirt was (age-depth modelling)

An ammonite looking stone object on a stand. The tag states it is 29.5 inches diameter, and claims it's 300 million years old, from the Atlas Mountains in Morocco. It's for sale for $1898.00

Close-up of part of the object showing distinct chisel marks.

Close-up of the object showing carving and chisel marks.

IANAP (I am not a paleontologist), but, this putative ammonite fossil, for sale in a shop in New Mexico, seems manipulated and not quite authentic.

A plane polarized light image of mostly feldspar that has unmixed in the solid state to bands of sodic and potassic rich zones.

A cross polarized light image of mostly feldspar that has unmixed in the solid state to bands of sodic and potassic rich zones.

Perthite, in a fayalite-hastingsite hypersolvus granite, Cauro-Bastelica Complex, Tolla dam, Corsica

The minerals crystallized from melt at high temperature and water-poor conditions.

#ThinSectionThursday #Minerals #Corsica #Granite

#FossilFriday 🧪⚒️

Assortment of fossil marine reptiles on display at the main hall of the Center for Paleontological Investigations, Villa de Leyva

P.S the Center for Paleontological Investigations, where this specimen is displayed, holds an impressive collection of fossils - and it is just one of three museums in the town of Villa de Leyva! A window into an early Cretaceous marine ecosystem

A Triceratops skull mounted on a red plinth in a display case. It has a large frill. At the Royal Ontario Museum.

Skull of Triceratops horridus!! The not so horrible Triceratops genera was one of the last ceratopsians and went extinct during the Cretaceous-Paleogene mass extinction. #FossilFriday ⚒️🧪🦖

It’s the Cambrian trilobite genus Olenellus from the Kinzer formation of Lancaster County, PA. There’s a surprising amount of Cambrian goodies from that formation but it’s hard to find outcrops. #fossilfriday

A stack sits on a black sand beach with some mountains behind, a little snowy, some frozen low cliffs, and white waves coming in. Backlit, so harsh light.

Sometimes you have to break the photography rules and shoot into the sun!

Fauskasandur (possibly, or could be Lækjavík - names on maps vary!) in south-east #Iceland yesterday.

Useful practices in single crystal diffraction analysis of reticular structures Single crystal diffraction analysis remains the gold standard for the three-dimensional atomic structure characterization of framework materials such as metal–organic frameworks, covalent organic fram...

My tutorial review on single crystal diffraction analysis is now online @crystengcomm.rsc.org! Students, supervisors, and reviewers: Please consider this thought-provoking read to discover many facets of the crystallographic practice that are often overlooked or misunderstood 💎 #crystallography

This summer, the 46th ICCC will take place in Denmark. As part of the conf., @carolhua.bsky.social and I are org. a symposium on chemical sensing using inorg. and hybrid materials (inc. MOFs). We would be happy to see contrib. from researchers at all stages of their careers.

Please share!
#chemsky

A floor standing instrument labeled Thermo Scientific and K-Alpha. Part of it is a sizable stainless steel vacuum chamber in which the sample is irradiated w X-rays, and the energies of ejected electrons are measured.

Just back from a demo of the XPS!
#Chemsky

Finger Lakes Old-Time Banjo Player Benny Bleu Announces ‘When I Am A Fossil’ Album - That Eric Alper Finger Lakes old-time banjo player Benny Bleu will self-release his new album ‘When I Am a Fossil’ on June 5, 2026. The project will be officially announced March 25 alongside the title track and an accompanying music video. Rooted in old-time tradition while branching into jazz textures and global rhythms, the record reflects Bleu’s background […]

Finger Lakes old-time banjo player Benny Bleu announces ‘When I Am a Fossil’, a concept album exploring geological time, environmental change and folk tradition, arriving June 5. zurl.co/SuHLx

Fossilized bones and skeletal diagram of a small dinosaur.

New specimen of Alnashetri shows it to be a late-surviving non-alvarezsaurid alvarezsaur retaining unreduced forelimbs and representing an independent evolution of miniaturization: www.nature.com/articles/s41... 🧪 (📷Makovicky et al.)

🌋 Éruption au #PitondelaFournaise
Le champ de lave s’élargit en aval du cône, avec de nouveaux bras de coulée.

🔧 une station de l’OVPF-IPGP à 1,7 km du cône, menacée par les coulées, a été démantelée par une équipe de l'OVPF-IPGP grâce au concours de la SAG et du PGHM.

Thin Section Thursday!
Fe-poor zoned sphalerite crystal in thin section (PPL) - ID verified by microprobe analysis. Photo by Ingrid Kjarsgaard (c)
You can contribute too! Send image(s) and short caption to akoziol1 (at) udayton dot edu. #thinsectionthursday

✔️📘 (Blue Book)

A Superfund site in MN is spreading, disrupting a tribe's way of life - MinnPost Little progress has been made despite 40 years of cleanup on Leech Lake Reservation. Locals fear for the health of surrounding waterways.

Update on hazardous chemical cleanup (or not) in groundwater at Leech Lake, #Minnesota 🧪⚒️

www.minnpost.com/environment/...

Breck tops Warroad in Minnesota High School Girls Hockey Class 1A Championship: Live score recap (2/21/2026) - NHL ST. PAUL — The Breck Mustangs last won a state championship in 2020. It’s one of four state title banners hanging in their arena to celebrate the

Breck tops Warroad in Minnesota High School Girls Hockey Class 1A Championship: Live score recap (2/21/2026)

https://www.rawchili.com/nhl/466712/

ST. PAUL — The Breck Mustangs last won a state championship in 2020. It’s one of four state…

Qatar smelter shutdown exacerbates Iran war aluminium fears The impact of the U.S.-Israeli attacks on Iran on the aluminium sector deepened on Tuesday after ‌Qatari smelter Qatalum began to shut down and shareholder Norsk Hydro issued a force majeure to custom...

An aluminum smelter is being shut down in Qatar due to lack of natural gas to run it.

www.reuters.com/world/middle...

📢New paper out:

"A classification framework for mapping lunar soils"

We propose a structured system to classify lunar soils for ISRU and future Moon missions — tested on the Apollo 15 deep core.
👇

🔗 acsess.onlinelibrary.wiley.com/doi/10.1002/...

#Pedology #Soil #ISRU #Regolith #Moon

A piece of the 300 million year old seabed that used to cover this area. The sand ripples are caused, then as they are now, by winds disturbing the waters above. So in some ways this is a preserved breeze from hundreds of millions of years ago. 🌬
County Clare, Ireland.

Perito Moreno has been stable for over 100 years, but it's no longer the case! 🧊🔥

The iconic Patagonian glacier has entered an unstable phase of retreat since 2018, increasingly rapid in recent years 📈

Retreat has been delayed until then by a morainal bank!

www.sciencedirect.com/science/arti...

Mer de Glace from Signal Forbes
1890 | 2013 | 2021 | 2024

Strong acceleration of the demise of the largest French glacier over last few years! 🧊🔥

Big Congrats! 🎉

In situ cosmogenic 10Be and 26Al reveal the complex exposure and erosion history of the landscape once covered by the Quebec-Labrador Ice Dome Abstract. The rate at which ice sheets erode rock and produce sediment is poorly known. Here, we use paired cosmogenic nuclides in both deglacial and modern sediment to understand better the efficacy ...

Hard to think about science and ice sheets when our president is waging a war of choice but new paper out from our group on glacial erosion in eastern Canada.

❄️🧪💙📚
#scicomm
#climate
#UVMresearch
#science
 🌎 🔬 ⚒️
#geosky
#ClimateHealth
#ClimateAction

gchron.copernicus.org/articles/8/1...

Quantifying landslide strain localization phenomena using tensor analysis of multi-temporal lidar data - Landslides A fundamental understanding of landslide evolution requires characterizing how deformation localizes within the sliding mass, as these non-homogeneous zones provide crucial insights into how destabili...

What could be better than tensor analysis to quantify landslide strain localization? How about open access tensor analysis to quantify landslide strain localization? A new paper in Landslides by Sarah Johnson, Yichuan Zhu, Jason Dortch, and me. ⚒️

link.springer.com/article/10.1...

Fantastic story on a wilderness library in #India

official.resource.org/@carlmalamud...