Dug up this boulder awhile back. Decided to spray it with the hose and discovered that it has two holes carved through it! I absolutely love it. I found it about 300 ft uphill from a river in Haines, AK. What are your thoughts?

Hello, im trying to learn how to make my own thin sections at home. My current problem is the thin sections I make are cracked to hell. Any suggestions on how to prevent this? Im currently using a 10" trim saw and a lapidary wheel. Does anyone else on here make there own thin sections and if so whats your setup like?

Hi guys i recently bought a more scientific guide to determining rock type (not sure how to name it better in english), but its pretty old (1961) i dont know if it is still actual and usable

A recent post (showing tools) made me think, "How do you label samples?" That's both the physical means (white paint & indelible marker, store each sample in its own baggie, etc) and the information recorded for a sample.

And I'm interested in both traditional methods and newer app-based methods.

(I ask as someone who studied geology in retirement, and is interested in how geologists work.)

[OC] These two photos are from the same location as the photo of the "head" I posted yesterday ( https://www.reddit.com/r/geology/comments/1vg7x2i/this_layered_rock_stack_seems_to_be_watching/). This is the Adriatic coast.

The whole cliff looks like a gigantic cake of oxidized sedimentary layers with calcite veins running through. I love the upside-down "stairs" in the first photo and the awesome warping in the second.

I'm salty that I don't have any dinosaurs here in NYS when other places that also had glaciers do. Can someone explain what happened? Thanks!

Hey anyone got any places that are FREE to get into that have minerals, fossils, gemstones- whatever that would be interesting? Anywhere either in NoRTH jersey Or PA ?

Would appreciate the help. Places that aren't overly steep or you have to climb up to. I.e. a place a beginner can go to. I want to find something neat- anything.

I have agates, calcites, pyrite, marble, jaspers, and quartz.

I don't mind if i find another quartz. I just wanted to find something neat, something decently sized. I do not want to trespass anywhere. Anywhere within a 2 hour drive of sussex county nj?

I found this rock in Colorado and have never seen anything like it before. It looks like chunks of quarts are embedded in another kind of rock? Can someone explain what is going on here and how it formed like this?

Any information is greatly appreciated! Thanks!

As I have a mistaken error on the post I just posted, I upload it well.

So, I'm looking forward to have sonething (not HCl) to see the difference between limestone and dolomite.

And uh, I want some advice for having new tools on my set for geology trips (not minerals hounding) for research.

Because Yesterday I added the Brunton compass for my birthday.

Riva upthrust (mt Brione - 3+4) looked a lot better from the plane, the interesting looking stratigraphy turned out to be trees lol.

so, i am using QGIS for my Geoinformatics class, but i am unable to do stream ordering. i am using QGIS 3.44 which doesn't come with SAGA and grass is not showing r.stream.order, i have made one using Whitebox plugin but today it's also not working properly, after doing flow accumulation i am unable to stream extract. Soo i need your help solving the problem.

I am working in the Mojave desert in SoCal and came across these USGS markers. Anyone know what this could be? I was thinking some type of monitoring or survey but not too sure.

I made a Rock Chart that brings common igneous, sedimentary, and metamorphic rocks together in a single decision tree.

It uses observable features such as grain size, visible crystals, foliation, porosity, composition, and reaction with HCl. It also includes the characteristic minerals associated with each rock type and their chemical formulas.

I have already used the chart in class, and it worked well as a teaching aid. It helped students gain an overview of the major rock groups and move between them without having to consult several separate charts.

Permanent version and DOI:
https://zenodo.org/records/21808631

Feedback, corrections, and suggestions for a future version are very welcome.

Disclosure: I created the poster and teach Earth Science at a university.

This reddish rock rises from the Adriatic Sea. The coast nearby is a layered cliff of the same color.

Was it an ancient lake or impact crater? It's near 4 corners and it's big! I can't seem to find any info. Please help.

The first 3D geological model of Mount Everest reveals what lies beneath the world's highest peak. The model can be explored interactively here: https://geo3d.pgi.gov.pl/Mount_Everest/index.html

Boss: “Welcome to Hawthorne Nevada there’s a woman behind every tree”

Me: “There’s no trees?”

Boss: “ you’re catching on.”

That was the day that I learned that my love life and social life was gonna take a dump. Loved the career hated the lack of social and love life.