New video about primary sedimentary structures exposed in an intensely glaciated landscape youtu.be/aTnj12CpXE4 ⚒️

Golden Eagle on the road into Swift Dam, from Depuyer, MT. #birds 🪶

Subtly hued colors draped across the Montana landscape yesterday from the air. #alwaysawindowseat

For my geologist friends: some andamooka opal from Australia featuring cross-bedding!

I take hope where I find it

Air quality is not great on approach to CHO, but it could certainly be worse...

I'm rewatching 'Shawshank Redemption' on the plane... ⚒️

Some nice thin ripples in Belt quartzite observed yesterday on Montana 287. ⚒️

Here we go... 😬

Thanks to the NSF OOI Regional Cabled Array, vent life (first discovered in 1977) can now be viewed live 2,100 m (~7,000 ft) below the surface! The RCA HD camera gives us an unprecedented view into an underwater world 1.5 miles deep and 200 miles offshore. 🌊🚢🧪 VC: J. Thirtyacre, Univ. of Washington

Fascist dictator exhibit #2,342,190,546

Great to finally catch up with you @callanbentley.bsky.social; let’s try to overlap next to an outcrop next time!

Wildflowers of Glacier NP

Drain babies. #BirdOfTheDay #NewLife 📷🌿🪶

Wishing everyone a very happy Airborne Toxic Event

ALERT: Entire DC area now under CODE PURPLE alert for very unhealthy air. This is some of the worst smoke pollution on record. Limit time outside and/or wear an N95 mask, if poss. The smoke will be with us all today but should improve tomorrow. Details here: www.capitalweather.com/wildfire-smo...

Guess how I'm feeling after my week-long field class?

Some butterflies today

Current status 🌈

Stromatolinos ⚒️

Most of my class yesterday at Grinnell Glacier. ⚒️

Stratigraphic calibration overlooking Two Medicine Valley ⚒️

Cretaceous fossil shark tooth in Virgelle Fm. (?) sandstone of the Western Interior Seaway, Looking Glass Highway, Montana. ⚒️

This year's Montana State University field class to Glacier National Park, at my favorite location lunch spot on this planet: ⚒️ #stromatolites

This place is INSANE. I love it so much. ⚒️

Really cool ooids in Snowslip Fm seen today in a cobble at Grinnell Glacier. Field of view is about 1cm. ⚒️

The Onion hitting us where it counts…. ⚒️🧪

The bigger of the two marmots I saw today.

Halite casts in Helena Formation limestone on an arête east of Siyeh Pass, GNP, Montana ⚒️

Man, this place... ⚒️

Contact between Helena formation limestone (top, tan) and intrusive diorite sill (lower, dark), Glacier National Park, Montana. ⚒️

Exceptionally round mud chip rip-ups in Grinnell Formation quartzite, Glacier National Park, Montana. ⚒️

Horodyskia, an enigmatic "string of beads" primary sedimentary structure in the Appekunny Formation of GNP, interpreted by some as the oldest eukaryotic fossil on Earth. ⚒️

Sunset on a full day.

Really nice cross laminated ripples in Belt sandstone + argillite. Zoom in on the details! ⚒️

Basaltic dike cutting through red Belt argillite strata in little prickly pear canyon, Montana. ⚒️

⚒️ Ok ig-pet and metamorphic folks. I need your help. WTF is going on with this amazing glacial erratic. It’s meta ash-flow tuff of Greentstone Lake known for feldspar phenocrysts that has been intruded by the Cathedral Peak Granodiorite. But WTF is up with the dendritic feldspar? I’ve never seen it.

Hiked up Sourdough Canyon south of Bozeman, in the Gallatin Range, to view this amazing garnet-bearing amphibolite. ⚒️

A subtle little filigree to the tick/disease map in this NYT opinion piece is that the tick exemplars twitch every few seconds. (At first I thought it was my own paranoia!) Clever! Gift link www.nytimes.com/2026/07/11/o...

Just saw John Fetterman & his wife on Main Street in Bozeman; I said "Hey Senator," as a test of my ID, and they both waved.

Pints and burritos at my favorite Bozeman watering hole.

Trying to figure out what's going on here... Is this supposed to be a cat?

Back in Bozeman! ⚒️

#FridayFold in the gneissic banding of this artifact. ⚒️

Scientists have caught Earth in the action of splitting apart at the seams, witnessing fresh oceanic crust forming in real time. Very cool 🧪 by @castelvecchi.bsky.social www.nature.com/articles/d41...

The strangest thing happened today. We went to the uninhabited island of Lunga, west of Mull, to look at the puffins nesting there. I was just taking photos when I felt a thump as something landed quite heavily in my head. It was a puffin! It stayed for about a minute before flying off.

One of mine attended this amazing weeklong ocean core boot camp! ⚒️

Professor Bebop, a fixture of WTJU & the community, passed on July 6, 2026. WTJU feels this loss acutely & shares a webpage of ongoing tributes from fellow hosts at wtju.net/remembering-professor-bebop. Professor, you'll be missed every Fri night, Tues morning & beyond! Catch ya on the flip side!

Trapdoor spider rescued from the pool: