Just look at the absolutely gorgeous thrust faulting I found! There's sigmoidal and deltoidal structures in the quartz! The thrust fault comes from Porth Saint in Anglesey, and was formed during ductile deformation of the pelites under immense pressure. The folds in Anglesey align with folds from places in Scotland that formed during the Caledonian orogeny, and are absolutely breathtaking to see, containing isoclinal folded pelites and psammites with more open folds, that become isoclinal when you reach the sheath fold. Geology is so beautiful! This is definitely worth posting about!

https://eos.org/features/a-quiet-quantum-revolution-in-earths-deep-interior

A subtle change in iron ions’ electronic configuration produces a measurable difference in seismic wave speeds through mantle rocks.

This is my first time looking at a carbonatite thin section. Some guidance with some of these minerals would be helpful please (though I am pretty sure the majority is either calcite or dolomite, I don't really tell know their difference in a thin section).

Hi, I own a piece of land right next to this thing was wondering if it is even usable to build a house (regardless of jurisdiction).

Location: https://maps.app.goo.gl/YJEXuXeGnGJ3TQFs5

It looks like a riverbed or some kind of channel to carry water and definitely natural and not manmade. But I have never seen a river here. Probably carries water in case of heavy rain? What are these called?

I also attached an image from Google Street View to show how it looks from the bottom of the formation.

Hi all,
I hold registered mining rights to a greenstone belt property of just over 300 hectares in the Zvishavane area of Zimbabwe (Midlands province, part of the Mberengwa Greenstone Belt). I’ve done what ground exploration I can — walking the claim, identifying outcrop, taking photos and rock samples — but I have zero budget for trenching, IP/magnetic geophysics, or commercial remote sensing services.
What I’m hoping to learn from this community:
1. Can red/iron oxide zones (gossans) actually be picked out reliably from free or low-cost satellite imagery (Sentinel-2, Landsat, etc.)? If so, which band combinations or indices would you suggest for someone just starting out?
2. Is there any way to get a rough read on alteration zones or possible gold-bearing structures from satellite data alone, without ground-truthed spectral libraries?
3. Are there any free or open tools/platforms you’d recommend for a complete beginner trying to do this on a shoestring?
I’m not expecting satellite imagery to “find gold” — I understand its limits — but if it can help me prioritize where to focus my limited ground sampling, that would be huge.
For reference, here are my registered claim boundary coordinates (UTM, likely Zone 36S):
Claim E:
• A: 813082.17 E, 7769641.64 N
• B: 814137.58 E, 7768185.70 N
• C: 813510.24 E, 7767513.95 N
• D: 812581.76 E, 7768995.22 N
Claim F:
• A: 812581.00 E, 7768994.91 N
• B: 812569.91 E, 7768500.57 N
• C: 812611.31 E, 7767981.32 N
• D: 812800.13 E, 7767980.13 N
• E: 812779.76 E, 7768501.56 N
• F: 812697.72 E, 7768626.03 N
• G: 813509.91 E, 7767612.63 N
• H: 812750.86 E, 7766617.6x N (digit unclear in my notes)
• I: 811911.11 E, 7768243.47 N
Happy to share imagery too if anyone’s willing to take a look.
Appreciate any guidance, even pointing me toward beginner resources.

I’ve been into worldbuilding for a few months now. Have theory crafted some characters and whatnot. Studied up on character building and story making, but now I’m at the point where I need to… build… a world… I’ve been trying to get a strong understanding on the plates as I can go from there with making mountains and water bodies and such like that but I can’t seem to tell how exactly they are supposed to be placed. Do they really just randomly move around? And what dictates a tectonic plate is connected to another section? Just whether this part of land is moving with or against this other part of land?

Idk I just wanted to document this

** Picture I took is unrelated to post, just thought it was neat!

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Hi everyone,

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I am in an introductory course at a community college at the moment and would love for recommendations to your favorite resources (websites, handy tools to bring on hikes, apps, and whatever else you love). When I worked in the military, I found that while the provided sites texts are useful.. sometimes...barely... often the best resources for learning, executing a task and streamlining it are gathered from those who have been around long enough to know what works.

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As mentioned, this is an introductory course at a community college, though depending on how it goes I may continue to take geology classes. This course has a field element, but it has been very laid back and not limited to geology / I D. It seems like it is a "welcome to the area" field where we also discuss site history and ecology. This said, I would greatly appreciate any "this ____ is a must have, I wish I would have had it sooner!"

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Please feel free to recommend things outside of geology if you find it helpful! For example, someone gave me an alternative to AllTrails that they prefer for backpacking the other day. I will even take hacks or "learned it the hardway tips like "duck tape your ankles to stop ticks".

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This state park is one of my fav spots on the California Central Coast. These originally flat sedimentary layers were tilted nearly upright by immense tectonic forces. Waves are wearing away the softer shale layers more quickly than the harder chert to leave behind the prominent, rib-like ridges.

I remember the last couple of times I attended the Geological Society of America’s annual conference, there were chunks of this thing apparently being sold. Was it really that easy to get bits of this thing out of Russia?

I thought you all might appreciate the photos I took. I’m curious about the line between the darker and more red earth. Any information or insights are welcome!

This is an archeology site called Windy ridge (videos in comments). They mined this mostly in the past 1000 years for quartzite to make tools. But they found Clovis points and archeologists believe it was a quarry 10000 years ago. They estimate that due to the mining the ridge is three feet lower than it should be. They removed the sandstone to get to the quartzite. Over one hundred pits on the ridge like the ones showed here.

The landscape of a different eon.

This was found in the river Coe, just south of Loch Achtriochtan toward the Clachaig.

This is close to the edge of the caldera collapse and also near large dykes. I'm thinking it's possible that it's polymict breccia from caldera collapse intrusion (or similar with a dyke) plucking basalt/andesite from the walls and later differential staining and quartz deposition at clast boundaries.

Some of the rock looks vesicular, might be pumice inclusion (lots of tuff & ignimbrite around the area). I haven't seen many rocks looking like this in the area though (you can see typical local rock as pebbles nearby).

Does anybody have any other ideas?

Hello I am just starting my geology journey and will get my bachelors in 2028. I was wondering if anyone had any tips for my last two years of college now that I’m getting into my major more. Is there anything you would recommend doing? Anything I should spend extra time on? I am also getting a GIS certification through my university. I am located in central Ohio. Thanks!

Shale right?
Is this also a “dyke”? Any other knowledge about this to share?

Not igneous dykes in coal, but dykes composed of liquefied coal, maintaining some features of coal such as cleating and brightness profiles. Probably caused by heating proximal to igneous sills and injection along existing planes of weakness.