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Many of us have used Oreo cookies as analogues when explaining plate tectonics, but all this time, "Geo" cookies existed! Who knew?!? What a wasted opportunity. 😁 #GeoEducation

This fold in chlorite was not produced by tectonic processes, but by the hands of an iron-age craftsman shaping clay into pottery. Interesting perspective for a geologist like me! I'm enjoying my foray into #archeology. :) #FridayFold

It's been a while, but I just found this "spherulitite" thinsection from the Oslo rift area in our teaching collection and thought that's my sign to contribute to #ThinsectionThursday again! 😃

Great fun to see #ElectronMicroscopy images acquired in the Goldschmidt laboratory at @uio.no in petri dishes as part of an art installation! Artist Ann Edvartsen Hay worked on mineral extraction and its effects on nature and communities: bodiesofextraction.com #ArtAndScience

A colleague asked for my help in polishing a thin section on short notice. I am quite busy, but who could say no to such a beautiful sample? 🤩 #ThinsectionThursday

Fantastic #FieldworkFriday with my petrology students today! We are lucky to have so much exiting geology here around Oslo. Today's focus: intrusive relationships between basalt and syenite, volcaniclastics, and a tiny bit of contact metamorphism.

Look at those interference colour fringes 🌈 in calcite! By focusing through the grain I can count eight orders. #ThinsectionThursday #Microscopy

A serpentinite mesh texture for #ThinsectionThursday. Or is it a piece of modern art? 🖌️ Note how there are several generations of serpentine, among them a clear one that filled the first fractures, and a dark one (full of magnetite) that replaced the rest of the olivine.

I just pasted this photo into a powerpoint, and the #AI-generated AIt Text is "A person drawing a fish on a rock". 😂 Pretty accurate description! #geology

I have used this garnet mica schist for teaching for years, but never noticed how beautifully the interference colours highlight the foliation (and the varying thickness of the thinsection). Having a scan of the whole section really changes one's perspective. #ThinsectionThursday

I don't often work with igneous rocks, but they do have cool microstructures, too! Skeletal Fe-Ti-oxide grains with lots of exsolution lamellae. (Width of image is ca 40 µm.) #ThinsectionThursday

Hello World, I am back and excited to (re-)connect with you! And we are just in time to start our 24 easy #KitchenOceanography experiments on oceanic processes, all using only household items, for a fun way to explore ocean physics. Find all of them here: mirjamglessmer.com/24daysofkitc...

Some beautiful interference colours for this week's #ThinsectionThursday. :)

Today: geology meets archaeology! This is what we call a "hunebed" in Dutch: a neolithic burial structure built by people of the Funnelbeaker culture between ~3400-3000 BC. Many are found across the northern Netherlands and parts of Germany and Denmark. But what are they made of?

For my first #ThinsectionThursday under the blue sky, one of my favourite micrographs: A serpentine pseudomorph after carbonate? The mineral with the grey interference colours is serpentine which apparently preserves the cleavage of a pre-existing carbonate.

Are you interested in how deformation and metamorphism interact? Consider submitting an abstract to our session at #EGU25 ⚒️🧪 meetingorganizer.copernicus.org/EGU25/sessio... Deadline to apply for travel support is om the 2nd of december!

I usually prefer working with thinsections, but sometimes 3D samples are fun as well! Here some gypsum growing in black shale from Oslo. Field of view ca 10 µm. #electronmicroscopy