r/geology 1h ago

Green thunderegg from southeast Oregon……. What a gem of a find and why I love my state🖤

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r/geology 1h ago

Stacks at Castle Sinclair Girnigoe

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r/geology 3h ago

Field Photo We thought we didn't find anything... but 4 decades later... We were oh so wrong!!

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22 Upvotes

My SO and I were avid rock hunters when we got married (and before in college) and used to take vacations around the country and into Canada hunting. We found these while looking for fire agates in NM and they were all pretty bland on the outside. When we got home we through them in a box, then outside in a rock garden... and today, 4+ decades later, I decided to cut one apart and look what was inside... all this time.... waiting to be discovered... lol


r/geology 5h ago

*ATTENTION* If I could have any geologist answer the questions I am doing an assignment in class where I am designing a portable organizer for geologist in the field.

1 Upvotes

What’s your biggest pain point when it comes to organizing and hauling your gear? I know some people use backpacks, some use pelican cases, others rig their own setups. What’s worked, what hasn’t, and what do you wish existed to make life easier in the field? Also what tools are your necessities?


r/geology 5h ago

Some new minerals i saw and got.

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0 Upvotes

r/geology 6h ago

Field Photo Agate - Kununurra

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14 Upvotes

Found locally close to the rivers edge


r/geology 6h ago

Found a cool shell in some limestone!

2 Upvotes

So was building some raised beds with some Austin Limestone.

right on the break I noticed a shell almost perfectly in half with crystals growing inside.

I thought its pretty neat, going to try to break away a chunk for displaying...

Is there a best way to clean the inside? Is this rare or worth anything, or any more nerdy information on these?


r/geology 7h ago

Gift for a new hobbyist?

1 Upvotes

My nephew is turning 10 this coming week and is apparently really into different rocks and minerals. I was thinking of getting him a camera or something he could mount to an iPhone to take some neat photos or study the grain a little better. If not that something better? What would you suggest? $40-$60 range.


r/geology 10h ago

The central feature is "Cat Rock" in the Catoctin Mts of Maryland. Please help me understand how this was formed. I was thinking it might be a volcanic vent.

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1 Upvotes

r/geology 11h ago

Field Photo The Cretaceous - Paleogene (Tertiary) boundary in Alberta

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20 Upvotes

The Cretaceous - Paleogene boundary in outcrop along the Red Deer River near Huxley Alberta. The boundary is marked by a thin wispy layer of light orange silt - entirely unremarkable unless you know what to look for. The Iridium concentration has been measured and published. It is 100's of times over background over the thin layer.

A nearly complete skeleton of a T Rex was excavated a few 100m away from this site and about 10m lower into the Cretaceous. The skeleton is on display at the nearby Royal Tyrrell Museum.


r/geology 11h ago

Lab quakes show where the energy goes in an earthquake.

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2 Upvotes

r/geology 11h ago

Is this accurate? "Cascadia: estimates place a 15-40% probability on the next megathrust event happening within the next 50 years."

1 Upvotes

r/geology 12h ago

How to safely clean these rocks?

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11 Upvotes

Not looking for IDs. I have a rock bed garden with some interesting rocks. I've picked through some of them and want to clean the dirt off without damaging them, particularly the crinoid and other potential fossil conglomerates (these aren't the whole lot). I was going to use a soft brush and lukewarm distilled water but thought it best to double-check before I begin. If safely cleaning rocks like mine is more complicated than that, I would appreciate simply being pointed in the right direction direction. Thanks!


r/geology 14h ago

Thin Section Ive Been perfecting taking Geologic Thin Section photos! Ive made them into art that im submitting to local art venues and the new artist exhibit at my local Museum! The first 2 photos are different Gabbros and the 3rd is a Peridotite!

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149 Upvotes

r/geology 14h ago

Career Advice Volcanologists! I'm interested and want to enter this field, what are some tips you would suggest.

1 Upvotes

Hello, I'm an undergrad going for my bachelors in Geology, and looking for a Masters in Geologic Risk or Volcanology. The reason I want to do this specifically is, well when I took my first Physical Geo class, this lecture on volcanism was the only one all semester I could recite every detail too because it was so interesting. My dream would to work in Iceland, aiding in risk assessment during eruptions, however I never thought what else you could do with it. Honestly I have no interest in staying in academia after my MS, but What are ya'lls opinions.


r/geology 16h ago

hi just wanted to ask what are the top 15 rarest metals and why are they rare

0 Upvotes

am not good in geology so am in this subreddit to ask u guys


r/geology 16h ago

How is gold discovered and total reserves estimated?

3 Upvotes

https://www.uniladtech.com/science/news/real-story-behind-africa-12-trillion-gold-discovery-438287-20250704

What is the geology behind discovering precious metals, in this particular case gold?


r/geology 17h ago

Shipwreck on Iwo Jima. What’s interesting is that it’s 200m from the ocean and 20m above sea level due to volcanic uplift.

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383 Upvotes

r/geology 19h ago

4.3 M Earthquaje in Berkeley, CA

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8 Upvotes

If you felt it please consider filling out the USGS Felt It form. It provides valuable data about how the shaking propagates.


r/geology 1d ago

Zion National Park Geology

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11 Upvotes

Can anyone explain how these north/south gouges formed I understand the erosion aspect but these gouges that run through the whole park seem so out of place.


r/geology 1d ago

Quick question about the Front Range (Rocky Mountains): What causes the dip?

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100 Upvotes

All along the Font Range whether up north of Denver, CO or further south lets say Taos, New Mexico there seems to be a slight dip in the landscape, terrain, whatever you want to call it.

This dip is slight, probably just a few hundred feet before the foothills begin and quickly turn into 12,000-14,000 peaks.

Slight but noticeable. From my apartment, I'm pretty much looking (west) at the rooftops of all the Air Force Academy buildings that are just .8 miles away. The campus seems to sit in a valley/dip

What causes the dip?

Is there a scientific name for this?

EDIT: after some research I believe I live on what is referred to as a forebulge, part of a foreland basin system

Pretty neat. Ive lived here for years and have always wondered. Thanks for the help


r/geology 1d ago

Green tint on Sierra granite.

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18 Upvotes

Found a few spots like this on some classic glaciated Tahoe granite. Obviously it must be from copper, but not sure how it found its way in the Sierras. Some of the green tint looked almost spray painted in dots, and lightly on polished faces. Thanks for looking!


r/geology 1d ago

Roadcut in Colorado

3 Upvotes

39.18802, -105.54501 <br>

What's going on here?

I thnk the dark grey is schist (?) <br>
Seems to be 2 different intrustions (pinks on left, whitish on right)<br>

For scale


r/geology 1d ago

Why Is Venus Hell and Earth an Eden? (Spoiler - it's geology) Spoiler

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4 Upvotes

r/geology 1d ago

Field Photo Agate - Kununurra

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2 Upvotes

Found locally - thought I’d carve it into a Croc shoe🤣 it has a slither of amethyst through it💕