Geology
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Veins or something else?
These look to me like regular intrusive iron rich veins. Boulder is about 1m across, and sandstone/mudstone, area is volcanic.
I am not a geologist.. any ideas?
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How do you polish bubbled igneous rock
Brand new amateur collector here, I have a piece of a rock that im trying to identify that is covered in what seems to be iron, which is hiding this bright blue rock ive never seen before, however the rock is full of bubbles and is extremely jagged, is there a way to examine and polish without harming the shape
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[OC] Haughton Impact Crater, Devon Island, Canada
cross-posted from: https://lemmy.ca/post/14740589
> high arctic desert. Yes there's water, but no real vegetation.
- www.atlasobscura.com Why Holes at the Bottom of the Ocean Disappear and Reappear
What lurks below doesn’t always stay beneath the sand.
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Circular Sand Dunes [on Mars] | HiRise
cross-posted from: https://lemmy.ca/post/13425339
> Sauce: https://www.uahirise.org/ESP_076510_2230
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Grindavík eruption - Þorbjörn (live feed of lava entering Icelandic town)
YouTube Video
Click to view this content.
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And Quartz, of course
Source: https://xkcd.com/2501/
Alt text: "How could anyone consider themselves a well-rounded adult without a basic understanding of silicate geochemistry? Silicates are everywhere! It's hard to throw a rock without throwing one!"
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Humans are disrupting natural 'salt cycle' on a global scale, new study shows | Phys.org
phys.org Humans are disrupting natural 'salt cycle' on a global scale, new study showsThe planet's demand for salt comes at a cost to the environment and human health, according to a new scientific review led by University of Maryland Geology Professor Sujay Kaushal. Published in the journal Nature Reviews Earth & Environment, the paper revealed that human activities are making E...
To the surprise of no environmental geo anywhere
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can anyone ID this deposit?
‐-----------------------‐-update 11-11‐----------------------
After more research and some lucky talks I believe this to be epidote from tailings out of the Wolverine Mine, a few miles from where I found these pieces.
‐-----------------------‐-original post------------------------
Was rock hounding on the southern shore of Lake Superior. Found these green crystal deposits that formed like geodes, specimens are small, the largest is about the size of a corn kernel. A local said it could be chlorasolite but I don't think it matches based on color and clarity. Any thoughts would be appreciated!
- phys.org Finding Argoland: How a lost continent resurfaced
Geologists have long known that around 155 million years ago, a 5,000 km long piece of continent broke off western Australia and drifted away. They can see that by the 'void' it left behind: a basin hidden deep below the ocean known as the Argo Abyssal Plain. The underwater feature also lends its na...
- www.livescience.com What's the deepest-occurring gemstone on Earth?
Very few gems can withstand the intense pressure of Earth's mantle, but some require it to crystallize.
How diamonds form still isn't entirely understood, but laboratory experiments show that the gemstones crystallize only under extreme pressures. Most naturally occurring stones have been traced to the upper mantle, at depths between 93 and 186 miles (150 to 300 km), where pressures can reach beyond 20,000 atmospheres.
For a long time, this put diamonds in competition with a gem called peridot for the title of deepest-occurring gemstone. Peridot is the gem form of a mineral called olivine that makes up more than half of the upper mantle, which extends from the base of the crust down to 255 miles (410 km). But in 2016, scientists described a collection of superdeep diamonds sourced from around 410 miles (660 km), and another batch in 2021 was determined to come from a depth of 466 miles (750 km).
- geologyscience.com The Cheltenham Badlands, Canada : Geology, Formation
The Cheltenham Badlands, located in Ontario, Canada, is a striking and unique geographical feature that has captured the attention of locals, tourists, geologists, and nature enthusiasts alike.
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New community for the dirty people: [email protected]
slrpnk.net Soil Science - SLRPNK# Welcome to c/soilscience @ slrpunk.net [http://slrpunk.net]! > A science based community to discuss and learn all things related to soils. [https://mander.xyz/pictrs/image/611854d1-deed-41fe-94cb-6884df803eeb.png] — — Notice Board This is a work in progress, please don’t mind the mess. — — Subdisc...
cross-posted from: https://mander.xyz/post/2703469
> cross-posted from: https://mander.xyz/post/2703465 > > > cross-posted from: https://mander.xyz/post/2702615 > > > > > One stop shop for for all of your pedology needs and dank soil compass memes. > > > > > > [email protected] > > > /c/[email protected]
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Researchers in Nunavut to explore Mars mystery | Winnipeg Free Press
www.winnipegfreepress.com Researchers in Nunavut to explore Mars mysteryAXEL HEIBERG ISLAND, NUNAVUT – A team of researchers has travelled to a remote Arctic island in the hopes of better understanding the possibility of life on Mars. Astrobiologist Haley Sapers, a...
cross-posted from: https://lemmy.ca/post/1673900
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[OC] Haughton Impact Crater, 2010
Impact melt breccia (grey) and upthrust rocks (brown). The breccia is interesting because the melt was a carbonate. So it's sort of like a carbonatite lava.
- phys.org New research dates the formation of Earth's continents
Researchers at Curtin University have established a new framework for dating the Earth's evolution including the formations of continents and mineral deposits.
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Australia and Arizona rock layers
Does Arizona and Australia share the same rock formation layers? I was watching a TV show and a lot of the Australian landscaped looked very red and similar to Sedona Arizona. Do they share the same layers?
- canadiangeographic.ca The Anthropocene is here — and tiny Crawford Lake has been chosen as the global ground zero
Hidden beneath the surface of this Ontario lake is an archive of the earth’s history sealed in mud
Fallout layer due to first nuclear test as horizon marker, among others
- www.irishtimes.com Geologist, botanist and artist - Brian Maye on Sydney Mary Thompson
Thompson was one of the first women to achieve distinction in the study of geology
> Thompson was one of the first women to achieve distinction in the study of geology
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Brochantite micromount from a 70 year old collection
I have been working on cataloging, organizing, and photographing the micromount collection that was made for my grandfather by Don Cooke. This is a nice little (well every specimen in this collection is little) Brochantite from Eureka, Utah. The main crystal is about 2mm long. More images of the specimen can be found here: https://imgur.com/a/QGUqBfM
I will try and share some more images of the collection in the next few days.
- www.economist.com A gigantic landslide shows the limit to how high mountains can grow
Enough rock fell off a Himalayan peak to bury Paris to the height of the Eiffel Tower
Enough rock fell off a Himalayan peak to bury Paris to the height of the Eiffel Tower
https://archive.is/oO0dC
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Deciphering the History of a Rock’s Crystallization - By combining a phase field function approach with bulk thermodynamics of mineral phases, the thermal history of a rock can now be deciphered from
eos.org Deciphering the History of a Rock’s Crystallization - EosBy combining a phase field function approach with bulk thermodynamics of mineral phases, the thermal history of a rock can now be deciphered from its distribution of mineral phases.
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Rock ID Thread
As requested by @[email protected] -- post pictures of rocks. We will try to identify them.
Note that copy/pasting pictures works in the comment field, assuming you're on the website. How it works in the multitude of apps -- dunno ;)
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Introduction to Geology | Earth and Space Sciences X
> A freshman-level introduction to Physical Geology. All learners are welcome!
20 lectures at the time of posting the playlist.
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[Meta] Shouting into the void
Hi folks. All 90 of you. Two weeks in and we're at 90. It's a far cry from the 173k on r/geology.
tl;dr: is it okay so far?
So far it's been mostly me, just trying to populate the community on a somewhat regular basis to keep the snowball rolling. And I just wanted to ask, is it okay that I'm doing pretty much exactly this? I know that the 90:10 rule applies here, maybe even more so until network effects take over. But I worry that I'm shouting into the void. Is there anybody out there? Just nod if you can hear me.
Assuming it's okay to keep shouting into the void as though this community is my personal blog, for the time being, is there anything you'd like to see? Exactly one of the posts gained any traction (the equivalent of hitting the Reddit front-page), but that doesn't necessarily reflect on what you, all 90 subscribers, want to see here while you're doomscrolling.
So I'm begging you, try licking this clear rock here. It's probably not salt, because it isn't cubic. And all the undergrads have been dropping HCl on it to see if it effervesces, so it's probably sour now from all that acid. Maybe it's a sugar crystal I grew in my coffee cup, suspended on a string and I'm hoodwinking you all. Meow.
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Geology MOOCs?
Are there geology MOOCs anywhere? Every time I go looking I find at most like three but one's in Chinese (which I don't know nearly well enough to take a course in), one's some advanced thing, and the other... I don't even remember.
Anyway, is there anywhere I could possibly peek into a course like... Rocks an' Whatnot 101 maybe? Dirt Stuff for People with Clean Hands, maybe? :'D I can't promise I won't end up disinterested or get bored or distracted and quit, but I want such courses to be a thing anyway.
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Xkcd: Earth Temperature Timeline
I keep this one on hand for discussions with people who say "but the climate has always varied". Rate of change is a thing.
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Doc: Down to the Earth's Core [HD] - National Geographic
YouTube Video
Click to view this content.
Full documentary. Not sure if NatGeo actually gets youtube royalties from it, or if it's a bootleg.