Ok Q: I was showing th 4 5yr Olds rock totly smushed in taconic orogeny and they asked how do we know volcano islands plowed into us? And I realized I don't know solid evidence for this. There shld be volcanic sourced sediments in the shales here from the deep ocean between us? 1/n
October 22, 2025 at 1:10 AM
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Trump administration defying court orders. Add another ground for impeachment to the orogeny of impeachable offenses by this executive.
A federal judge ruled on Tuesday that the Trump administration had violated his previous court order by implementing a nearly identical policy that again made state cooperation with federal immigration enforcement a condition for receiving grant funding from the Federal Emergency Management Agency.
Trump administration flouted court order on FEMA grant funding, US judge rules
A federal judge ruled on Tuesday that the Trump administration had violated his previous court order by implementing a nearly identical policy that again made state cooperation with federal immigration enforcement a condition for receiving grant funding from the Federal Emergency Management Agency.
reut.rs
October 14, 2025 at 3:57 PM
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Anticline in the Paleoproterozoic Thomson Formation, near Jay Cooke State Park, Northeast #Minnesota. Deformation due to the Penokean Orogeny, ca 1850–1900 Ma. This is a favorite fieldtrip stop; included in the GSA Centennial Guidebook. An October picture from the archives. #geology #FridayFold 🧪⚒️
October 11, 2025 at 4:37 PM
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orogeny
October 7, 2025 at 11:06 PM
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September 26, 2025 at 12:38 AM
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September 23, 2025 at 6:17 PM
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"The idea was taken up to explain the Laramide orogeny, as the flat slab subduction zones on the Andean margin are associated with more inboard surface deformation and magmatic gaps.[2]"
2 is a reference to Eugene Humpherys' 2003 paper and not Bill Dickinson & Walter Snyder's 1978 paper.
2 is a reference to Eugene Humpherys' 2003 paper and not Bill Dickinson & Walter Snyder's 1978 paper.
September 21, 2025 at 10:33 PM
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I love the ruggedness of Sardinia.The largest part consists of a Variscan (Paleozoic) basement, made of metamorphic rocks and a Permo-Carboniferous granitic batholith, formed during the Variscan orogeny around 340 to 280 million years ago. #Sardinia 🇮🇹
September 17, 2025 at 7:44 AM
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tgirl that's really into geography, and i don't mean the "i can name and locate all the countries" kind
i mean the "i know all about tectonic movement and orogeny and epeirogeny and ok maybe i am more of a geologist but i like seeing it through a cartographic perspective" kind
i mean the "i know all about tectonic movement and orogeny and epeirogeny and ok maybe i am more of a geologist but i like seeing it through a cartographic perspective" kind
September 13, 2025 at 4:31 PM
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Good morning bluesky
Today's MJ daily theme is "nagssugtoqidian orogeny", referring to a mountain-building event which took place in Greenland some 2 billion years ago.
`Nagssugtoqidian orogeny` --p #midjourney
Today's MJ daily theme is "nagssugtoqidian orogeny", referring to a mountain-building event which took place in Greenland some 2 billion years ago.
`Nagssugtoqidian orogeny` --p #midjourney
September 10, 2025 at 9:31 AM
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The Laramide orogeny (fancy way to say "mountain building event) is weird.
Around 85 million years ago, mountain building in North America suddenly jumps eastward, well into the stable part of the continent and far from any plate boundary.
This was a major challenge to the idea of Plate Tectonics.
Around 85 million years ago, mountain building in North America suddenly jumps eastward, well into the stable part of the continent and far from any plate boundary.
This was a major challenge to the idea of Plate Tectonics.
September 20, 2024 at 6:57 PM
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Orogeny in glorium.
March 12, 2024 at 11:18 PM
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One of my Alpine Orogeny paintings. This one is of Ballard Down. What a walk, what a view. T'was amazing!
#alpineorogeny #ballarddown #dorset #artistsofbluesky #art
#alpineorogeny #ballarddown #dorset #artistsofbluesky #art
February 13, 2025 at 9:30 AM
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hmm... what is this mcphee thing? i've seen it but never looked at it. reminds me i'm still figuring out how my landscape got created during the taconic orogeny... surrounded by al this crumbly and philo doughy shale...
August 8, 2023 at 11:22 PM
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July 20, 2025 at 8:28 PM
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Also from he Québec government geology web site:
The Grenville province was creaed by the Grenville Orogeny when something collided with Launentia province and created huge mountains. Erosion has made the Luarentians much smaller. But this is where they come from […]
[Original post on mstdn.ca]
The Grenville province was creaed by the Grenville Orogeny when something collided with Launentia province and created huge mountains. Erosion has made the Luarentians much smaller. But this is where they come from […]
[Original post on mstdn.ca]
September 2, 2025 at 7:06 AM
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NOW I've become wiser & therefore I want to make sure you don't 'die ignorant' either
Oslo lies on a rift valley created by volcanism ( en.wikipedia.org/wiki/Oslo_Gr... )
This is also the reason for earthquakes - here's a report www.jordskjelv.no/meldinger/li... with seismic diagrams, etc.,
2/4
Oslo lies on a rift valley created by volcanism ( en.wikipedia.org/wiki/Oslo_Gr... )
This is also the reason for earthquakes - here's a report www.jordskjelv.no/meldinger/li... with seismic diagrams, etc.,
2/4
![The Oslo Graben or Oslo Rift is a graben formed during a geologic rifting event in Permian time, the last phase of the Variscan orogeny.[1] The main graben forming period began in the late Carboniferous, which culminated with rift formation and volcanism, with associated rhomb porphyry lava flows. This activity was followed by uplifting, and ended with intrusions about 65 million years after the onset of the formation. It is located in the area around the Norwegian capital Oslo.
The lava production was high when the rhomb porphyry lavas were deposited. The lavas reflect a period of abundant earthquake-related movements, when tectonic forces tore the crust apart.
In the Vestfold district, one lava flow was deposited on average every 250,000 years, resulting in a 3000-metre thick sequence of mainly volcanic material. In the Oslo area, lavas were deposited on average every 800,000 years. Only a few plant remains have been found between these lavas. The bedrock in this area, roughly from Skien to Oslo and Mjøsa, results in soil rich in nutrients important for plant growth.
Since the Permian, erosion has removed the volcanic peaks and indeed most of the lava layer and laid bare the magma chambers and volcanic pipes deep below, allowing scientist a rare view of what goes on beneath a rift valley. This made it popular among early students of geology, among other Christian Leopold von Buch (1810). Several of the old magma plumes are now quarried, the rich black larvikite (named from Larvik, a town south of Oslo) being one.
The Särna alkaline complex in western Sweden, also of Late Carboniferous age, is thought to be related to the Oslo Graben as it is aligned to it.[2]
See also
Kattsund-Koster dyke swarm – Large geological structure in Norway and Sweden](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:dx37xbq466iutfexm2lfeiut/bafkreic5fzss3pnzr3daqrnpcribnuj4emlvlml35y7wh2stilugbfqpwq@jpeg)
October 27, 2025 at 9:03 AM
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I wouldn't have wanted to be around there during the Grenville Orogeny
December 14, 2024 at 2:31 AM
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They're only the weathered remains of once much bigger mountains that would have been emplaced by an orogeny even longer ago - the oldest surface rocks I was working on in WA were >2.5Byo and are the highly deformed remains of those mountain building events.
September 17, 2023 at 7:04 PM
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Northern Spain came up a bit during a younger orogeny of the Pyrenees. Basque Country was pushed up over the Bay of Biscay crust, causing uplift. And Iberia as a whole came up in the last 20 million years, by a km, making the Meseta Central. Probably because of motions in the underlying mantle.
September 7, 2024 at 7:35 AM
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Congrats on 200 and I hope you swiftly reach your next milestones because you absolutely deserve it! Your artwork is beautiful and you bring characters to life so well 🤍 Here's a handful of my OCs, if I happen to win just follow your heart!
March 30, 2024 at 9:15 PM
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"There was almost enough resonance in some terms to stir the adolescent groin. The swelling up of mountains was described as an orogeny. Ontogeny, phylogeny, orogeny—accent syllable two. The Antler Orogeny, the Avalonian Orogeny, the Taconic, Acadian, Alleghenian orogenies. The Laramide Orogeny.
April 5, 2025 at 6:11 PM
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“No one is united until Pangaea is united”
- Oath of the Friends of the Caledonian Orogeny
- Oath of the Friends of the Caledonian Orogeny
August 11, 2025 at 10:35 AM
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The issue is that this is *not* what's happening in much of the western US. Things that were stable for 500 or more million years and consistently acted as backstops for orogeny have destabilized in the mid-to-late Cenozoic, during a period of orogenic collapse.
October 22, 2024 at 6:23 AM
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