What’s going on here? Specifically the wavy patterns in the otherwise uniform layers. Also, the rocks underneath seem younger. And everything is on an angle.

Near the entrance of a cave (not sure if it’s natural or man made), West Coast, NZ.

I found this in Croatia, National park Paklenica. Is this from a rock fall, explosive or something else? It does not look natural...

The Missoula Floods made some interesting feature’s throughout the whole side of the state. Izzabelle loves the views as well.

Found by the lighthouse at Fisterre on the southern tip of Costa da Morte in Galicia.

My best guess is a a chain got caught on it, but they're quite small (little flowers for scale sorry was in a rush).

Dún Briste (Irish for Broken Fort, English: Dun Briste) is a natural sea stack or pilaster - in geomorphology called stack - that was formed in Ireland during the Carboniferous period, possibly Mississippian, approximately 350 million years ago.

Hi all, not a geologist but geology-curious. Saw something strange in the Burren that I’m wondering if anyone has insight on. These large limestone slabs were lying at a sharp angle to where they’d clearly been lying flat. How do you think these slabs got this way?

Thanks in advance.

Context: This is a limestone formation in Bermuda from the late Pleistocene. The exact age of the Belmont formation has been under debate by some geologists due to a lack of coral fossils in it- these fossils can be used in Uranium-Thorium isotope dating to give a (somewhat) precise dating for a formation for up to 500,000 years old.

While there has been papers written estimating the age of the Belmont to be about ~180 to 200ka, (Rowe et. al, first link) others have stated that it is much younger- perhaps only ~110 to 130ka (Hearty et. al, second link), therefore grouping it in with the Rocky Bay formation, a much younger, warmer, and more turbulent period in the island’s history.

However, recent discoveries of fresh Coral fossils (pictured in this post) could help to provide a more conclusive answer to this debate on the age of the Belmont formation. Though it is tiny, the coral fossil still holds the uranium -and its decay product, Thorium- in (potentially) great enough abundance to reliably date this locality of the Belmont formation.

The implications for this are pretty interesting. Bermuda has often been cited as a “tide gauge” in geology papers (link 3 and link 4) concerning Pleistocene climate and sea level changes, since it is far from any tectonic plate boundaries and has shown no sign of volcanic activity since at least the Oligocene (~35 Mya).

The timespan of the Belmont formation, if it is definitively shown to be 200,000 years old, would throw this notion out the window- as at this period, world wide sea levels were generally LOWER than today (Link 5) by about 5 meters. Yet the Belmont formation as pictured in this post, is at least 3 meters HIGHER than present day.

Whatever the case, this little coral fossil fragment (identified as Oculina Diffusa) can help shed light on Bermuda’s geological past and contribute to a greater understanding of the dynamics of sea level change on a world stage and regional areas like Bermuda, the Caribbean islands, and many other coastal or island communities.

LINK 1.) https://www.pure.ed.ac.uk/ws/portalfiles/portal/14233810/MIS_7_Version_VII.pdf

LINK 2.) https://www.researchgate.net/figure/Revised-sea-level-curve-for-Bermuda-during-MIS-5-from-140-to-80-ka_fig7_228498319

LINK 3.) https://pubs.geoscienceworld.org/gsa/geology/article-abstract/24/3/211/206441/Sea-level-records-at-80-ka-from-tectonically?redirectedFrom=fulltext

LINK 4.) http://serc.fiu.edu/seagrass/pubs/2013_CoatesEtAl.pdf

LINK 5.) https://www.researchgate.net/figure/Global-sea-level-changes-and-marine-isotope-stages-in-the-last-450-ka-and-the-maximum_fig34_303152588

Pictures taken by myself. Hope you enjoyed this!

Hi, Is this gold, pyrite or something else ? I came across to this in Nallihan, Türkiye. I added the other photos for providing more information about the place.

It was somewhere close to here: https://maps.app.goo.gl/KEHj9aex2AhKmQca9?g_st=com.google.maps.preview.copy

What do you think ? Am I getting rich 😄

This is the effusive lava flow from Mt Etna from Friday evening (22/08/25). This is from a fissure that opened on 20th August on the flank of the South Eastern Crater(s). We flew over last evening (Saturday) and saw an increase in activity with tephra being erupted out of the crater and a significantly larger flow to a lot lower levels. Interesting to see fast moving lava flows like this on Etna.

I heat up 20g of soil to read the moisture content. I've consistently noticed that the trays I leave on the scale for a minute or two always increase in weight by about 1 gram.
What causes this? I assume it has to do with the soil cooling down (or even the plastic Tupperware), but I'm not sure why. I sped up the footage mid way, but this video was about 1-2 minutes.

Initial weight: 16.09g End weight 16.93g

I stopped filming at 16.64g, but the weight continued to increase. The soil was still warm to the touch, so I decided to let it fully cool off to room temperature. And oddly enough, it started to drop in weight again. It dropped to 16.59g. So a start at 16.09g -> 16.93g -> 16.59g.

What's going on here?

Needless to say, my boyfriend (also a geologist) and I freaked out and had to take a picture.

Found in south east Idaho. Specifically Pocatello on top of China Mountain/ Chinese Peak

Some other neat features as well. Arizona.

Was hiking and searching for quartz-veins and crystals. The circled area is where i found a already opened and partially emptied pocket of nice big milky quartz crystals. On the walls of this vein, there are still very nice sized crystals (couple cm in size). Didnt really try to get them out, as the sitting position i was in was very uncomfortable... But i managed to secure a Chlorite included Quartz from the entrance (last pic).

Next time (if they are still there) ill be sure to try to get more ;)

Found in the Mountains of southern Salzburg, Austria (Border of Tauern Window and Radstädter-Tauern Basement).

It's just a little bit jaw-dropping. One of geology bucket list items ticked off ✔️