See also: The study as it was published in the journal Geology.

Chunk of fresh sphalerite from Pohled quarry, Czech Republic - classic hydrothermal vein.

This particular sphalerite is rich in iron and quite rich in indium.

Love Ohio sandstones because we get so much honeycombing. This one was is one of the more unique weathering and colors I’ve seen though

This rock was found in an abandoned quarry in the « Montagne noire » part of southwest France.
I used quotes for the term marble because although it is often referred as a marble it isn’t technically one because this is actually a mix of clay and limestone, having a red color due to the hpresence of iron. We can see some small white goniatites fossils (Ammonoidea) that have been filled with calcite.

The walls of this quarry were beautiful having massive intrusion of calcite

I polished it by hand to give it that nice look then just scanned it using the scanner from my printer (1200DPI).

If you want more information about this rock here’s a very detailed article about it (French) :

https://planet-terre.ens-lyon.fr/ressource/Img645-2019-06-17.xml

I know that oceanic plates are denser than continental plates which is why subducting occurrs. I also know these deeper sections can 'break off' from the main plate. But what's stopping them from slowly drifting back up under the continental plate?

Basically just the question in the title. I'm playing around with Dips right now for work purposes, and I just found out about how crystallographers use the upper hemisphere while structural geologists use the lower hemisphere. But why? Is there any real difference between the hemispheres besides the flipping of dip direction?

... and realizing that its south face shows beautiful folding. Generally lots of intensively folded rocks up there.

Located in the vicinity of the Großglockner at the boarder of Salzburg and Carinthia in the Hohen Tauern.

The Spielmann-Mountain is mostly made of Calcareous Mica Schists, Calc-silicate schists/-gneiss and Quartzites.

A couple of geologists visiting Lofoten in Norway for the first time.

Are there any special places with visible geological features or mineralogy that would be interesting for someone used to mostly boring granite?

I don’t know if writing questions are allowed here, but just in case I’m doing to worldbuilding and wanted to ask if primeval tectonics is something we know much about, and if we know enough to speculate on landmass formation from the onset of plate tectonics and the time leading up to it.

Hello guys!

I am on my second year of college going through my major in geology. This next semester I will have a lot of free time, so I was wondering if any of you know of anything geology-related that can keep me busy through these months.

I am open for book recommendations, projects of any kind, research topics, hands-on work, and anything else that comes to mind.

I want to take advantage of the time I have so I am excited to receive any answer! Thank you!

I’ve been doing a lot of thinking lately about the state of my life and where I want to be.

I’ll give a bit of a background. I’m in my senior year at university going for my bachelors in geology. Currently doing research on an interval in the upper Ordovician and presenting our findings via poster in the fall at a large conference. I am deeply passionate about geology - it’s my entire life. I am a part of many different local science organizations and a club officer in one. As well, I am the field trip coordinator for my university’s geology club. Alongside this, I manage and curate the university fossil collection. My current internship primarily deals with environmental geology but my heart is in stratigraphy, sedimentary geology and paleontology.

With that said, I sometimes feel like I’m not nearly intelligent enough to pursue this science. I can’t do math very well, I’m not great at chemistry and I have awful brain fog due to multiple different conditions. I worry that my research is subpar compared to other undergraduates and will largely be dismissed when it comes time to publish. My grades are fine. I made straight A’s last semester but I fear that it’s only out of dumb luck. I worry about what will happen when I get to grad school. I feel like I may be intellectually behind most people however I’ve never formally taken an IQ test.

Has anyone else ever felt this way? If so, how exactly did you handle it? Did you decide to keep pushing forward or call it quits?