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callanbentley.bsky.social
Callan Bentley
@callanbentley.bsky.social
3.1K followers 1.1K following 2.7K posts
"bluebirds, bluegrass, blueschist, bluesky"
Community college geology professor in Charlottesville, Virginia, USA
Posts Replies Media Videos
callanbentley.bsky.social
Movies about / near / set in San Francisco:
(what am I missing??)

The Presidio
The Birds
Dirty Harry
Ant Man
Inside Out
The Wild Parrots of Telegraph Hill
Zodiac
Rise of the Planet of the Apes
Contagion
Mrs. Doubtfire
48 Hours
The Circle
Milk
Escape From Alcatraz
(1/2)
November 20, 2025 at 12:09 AM
Reposted by Callan Bentley
simoncarn.bsky.social
Some stunning footage of ongoing pyroclastic flow activity at Semeru #volcano (Java, Indonesia). Screen capture shows a lightning strike at ~16:07 UTC. www.youtube.com/watch?v=Txgr...
November 19, 2025 at 4:06 PM
callanbentley.bsky.social
The answer was: "deserts"
callanbentley.bsky.social Callan Bentley @callanbentley.bsky.social · 19h
Guess what our topic is in Physical Geology class today? ⚒️
A photograph of a lab.wall and table with a monitor showing a photograph of a banana split.
November 19, 2025 at 7:26 PM
callanbentley.bsky.social
Guess what our topic is in Physical Geology class today? ⚒️
A photograph of a lab.wall and table with a monitor showing a photograph of a banana split.
November 19, 2025 at 2:31 PM
Reposted by Callan Bentley
rapiduplift.bsky.social
Lateral moraines, older and more recent, of the Pindari Glacier.

The older moraines, further from the glacier (~3 km), have eroded into gentler rounded linear ridges. The recent moraines retain a sharp edged relief.

Kumaon Himalaya. November 2025.
Pic shows rounded linear ridges (red arrows) covered with dried grass hugging the base of a steep hillside. These are old lateral moraines of the Pindari Glacier in the Kumaon Himalaya, Uttarakhand. Lateral moraines (red arrows). Sharp ridges, made up of light colored rock dust and debris near the Pindari Glacier, Kumaon Himalaya.
November 19, 2025 at 10:50 AM
Reposted by Callan Bentley
drlauragregory.bsky.social
Fieldwork, labwork, earthquakes and more!! Get in touch if you're interested in doing a PhD with me @earthandenvleeds.bsky.social
Please share, and check out details here: yes-dtn.ac.uk/research/the...
The inner workings of the earthquake cycle: New insight from integrating Quaternary fault activity, microstructures, and geophysics - Yorkshire Environmental Sciences • Doctoral Training Network
Summary Fault activity is now known to be highly dynamic, with observable spatial and temporal variability in earthquake recurrence and the style of fault slip. This exciting project explores the unde...
yes-dtn.ac.uk
November 18, 2025 at 10:22 AM
Reposted by Callan Bentley
christhorogood.bsky.social
Deep in the Sumatran jungle today we found the extraordinary flowers of Rhizanthes pushing their fangs through the forest floor. A sap-sucking, leafless parasite, this is one of the world's weirdest plants.
November 16, 2025 at 2:48 PM
Reposted by Callan Bentley
drwendyrocks.bsky.social
Fly along the San Andreas fault in Southern California in the Coachella Valley near Palm Desert and Indio. 🧪
November 16, 2025 at 8:59 PM
callanbentley.bsky.social
Taking bets for: May maximum 2026. ⚒️
Graph showing the past two years of the Scripps "Keeling Curve" Mauna Loa CO2 data. Each year (2024 & 2025) the numbers peak in May, and reach a minimum in September. May 2024 ~427 ppm, Sept 2024 ~421 ppm, May 2025 ~430 ppm, Sept 428 ppm.
November 16, 2025 at 9:09 PM
callanbentley.bsky.social
Funky stuff going on w/ this gravitational lensing.
cheribliss.bsky.social Cheryl Blanchard @cheribliss.bsky.social · 3d
🔭 JWST Program 6882 - Vast Exploration for Nascent, Unexplored Sources (VENUS): www.stsci.edu/jwst-program...

Target: A2813, released: 2025-11-15
NASA, ESA, CSA, STSci/ #JWST NIRCam 444, 356, 150
target: A2813, released: 2025-11-15, processed: C.Blanchard
November 16, 2025 at 9:03 PM
callanbentley.bsky.social
Eupohoric euxinia - maybe this was the color of Earth's oceans during the end Permian mass extinction? ⚒️
geomikerobe.bsky.social Mike McCormick @geomikerobe.bsky.social · 11d
Diving through the purple sulfur bacteria layer of Fayetteville Green Lake with our ROV last month. This is the most intense density of PSB that I've seen in many years!
November 16, 2025 at 6:23 PM
Reposted by Callan Bentley
ericlagadec.bsky.social
Vous assistez, quasiment en direct à la formation d'un cratère sur la Lune, avec un impact filmé ce matin !
November 16, 2025 at 3:26 PM
callanbentley.bsky.social
Spent 2 hours searching for 𝘉𝘰𝘵𝘢𝘶𝘳𝘶𝘴 𝘭𝘦𝘯𝘵𝘪𝘨𝘪𝘯𝘰𝘴𝘶𝘴 this morning at Ivy Creek Natural Area, but I left bitternly disappointed.
www.allaboutbirds.org/guide/Americ...
American Bittern Overview, All About Birds, Cornell Lab of Ornithology
You'll need sharp eyes to catch sight of an American Bittern. This streaky, brown and buff heron can materialize among the reeds, and disappear as quickly, especially when striking a concealment pose ...
www.allaboutbirds.org
November 16, 2025 at 3:49 PM
callanbentley.bsky.social
Exciting new discovery in core drilled east of Charlottesville - a rhyolite within the greenstone! This should provide a valuable U/Pb date from its zircons. ⚒️
Photograph of a box of five rock cores, three of which show Catoctin greenstone with stretched chlorite-filled amygdules, but the second-from left shows pink/tan rhyolite at the bottom, and the left-most core is 100% rhyolite, featuring K-spar phenocrysts and a spherulitic texture in the center of the core. All the cores have been misted with water to make them look better.
November 15, 2025 at 2:12 PM
Reposted by Callan Bentley
patrlynch1.bsky.social
Great Horned Owl (Bubo virginianus). From my book "A Field Guide to Cape Cod," Yale University Press. a.co/d/eK4A0sd
🧪🐡🌿🌎🪶 #wildlife #scicomm #sciviz #wildlifeart #illustration #scientificillustration #natureart #visualscicomm #sciviz #scicomm #birds #BirdArt #CapeCod
Digital illustration, done in Photoshop with a Wacom drawing tablet.
November 15, 2025 at 2:05 PM
callanbentley.bsky.social
Named (for the moment, at least) after a local boy from Albemarle County, whose name is also applied to the range of mountains that runs through Glacier National Park, as well as the thrust fault that brings those Proterozoic Belt rocks on top of Cretaceous shales. ⚒️🦉
abcbirds.bsky.social American Bird Conservancy @abcbirds.bsky.social · 5d
Introducing our #BirdoftheWeek, the rule-breaking Lewis’s Woodpecker!

🔴🟢⚪⚫ With a red face, pink belly, green back & silver-gray collar, they catch insects mid-air & store acorns for winter.
Found in western U.S. & Canada.

🪰 Learn more in our bird library:
abcbirds.org/birds/lewiss...
Bird of the Week, the Lewis's Woodpecker with facts in a text box. Population 82,000 and stable trending population.
November 14, 2025 at 10:50 PM
callanbentley.bsky.social
Visiting Boscobel Quarry today. ⚒️
Half a dozen benches down in a granite quarry, with a large haul truck receiving broken granite from a loader. An African American student looks through a hand lens at a sample of granite. They have dredlocks, and their sunglasses are pushed up on their forehead. Brightly lit quarry wall. Horizontal gneissic banding is visible.
November 14, 2025 at 10:44 PM
callanbentley.bsky.social
Picking through the core discard pile at Luck Stone's Boscobel Quarry. ⚒️
Five geology students behind a GIANT pile of white rock cores.
November 14, 2025 at 8:26 PM
callanbentley.bsky.social
Geopetal gastropods from Mississippian Reynolds limestone. #FossilFriday
⚒️
Weathered limestone showing snail shells in cross section partly filled by light gray sediment and partly filled with darker coarsely crystalline calcite spar. Pencil tip for scale.
November 14, 2025 at 4:32 PM
Reposted by Callan Bentley
caylen.bsky.social
a “Space Force”, if you will
dieworkwear.bsky.social derek guy @dieworkwear.bsky.social · 7d
we need a department of kerning
The Department of War's seal hangs on a wall. The kerning appears to be off.
November 13, 2025 at 2:27 PM
callanbentley.bsky.social
Represented STEMSEAS @ the UNOLS mtg in Alexandria. 1 of my Alaskan cruise mentees shared her geology conversion experience w/ the crowd. She, STEMSEAS co-PI Sharon Cooper, & I demonstrated the program's vitality for utilizing transits of the US academic research fleet for changing student lives. ⚒️🌊
A STEMSEAS alumna recounts how important her cruise in Alaska was for motivating her to pursue geology at Wellesley. A STEMSEAS faculty mentor (Callan), PI (Sharon Cooper), and student mentee all gather for a group portrait selfie at a post-meeting reception in a brick lined bar.
November 13, 2025 at 1:31 AM
Reposted by Callan Bentley
thefosterlab.bsky.social
Fully funded PhD projects available in my group (Please share with interested parties, details here: www.thefosterlab.org/blog/2025/11...):
PhD Topics - Entry September 2026 — The Foster Lab
This year we are involved in 3 fully funded PhD projects via IGNITE our NERC DLA. The deadline is Thursday Jan 8th 2026 .  1.      Is the world already 1.5 C warmer?...
www.thefosterlab.org
November 11, 2025 at 1:46 PM
callanbentley.bsky.social
It's that most meandering time of the semester.
@emriver.bsky.social
⚒️
November 10, 2025 at 7:58 PM
callanbentley.bsky.social
Video recording of a talk I gave last week to NOVA's Honors program -
"Building the Appalachian Mountains in Ten Easy Steps"
(𝘈 𝘣𝘪𝘭𝘭𝘪𝘰𝘯 𝘺𝘦𝘢𝘳𝘴 𝘰𝘧 𝘨𝘦𝘰𝘭𝘰𝘨𝘺 𝘪𝘯 𝘩𝘢𝘭𝘧 𝘢𝘯 𝘩𝘰𝘶𝘳 𝘰𝘧 𝘡𝘰𝘰𝘮 𝘭𝘦𝘤𝘵𝘶𝘳𝘦)
youtu.be/rTrlePR_bsw
⚒️
"Building the Appalachian Mountains in Ten Easy Steps"
YouTube video by Callan Bentley
youtu.be
November 10, 2025 at 12:46 PM
callanbentley.bsky.social
Crazy to me that it is November 9th, and I'm still hearing katydids singing in the evening.
November 9, 2025 at 10:23 PM