I like epi-volcanic atolls, but at times, they find themselves being subducted to the depths of the Earth. That puts a lot of carbon into the asthenosphere and accelerates CO2-rich arc magma ascent (and maybe restarts the cycle).

link: https://www.nature.com/articles/s41467-026-71536-3

#Volcano #Tectonics #Subduction

Subduction Retrieval [XKCD]
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https://xkcd.com/3218/
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โ€œPSA: Please stay out of the Pacific Ocean today. Someone lost their wedding ring in a subduction zone and USGS is pulling the plate back up to retrieve itโ€ฆ
Aww, the oceanic crust and the continental crust are getting married!...โ€
#PSA #geology #platetectonics #subduction #margins #XKCD #fedservice #publicservice #RingOfFire #weddingring #humor #humour #PacificOcean
#USGS #XKCD
The โ€˜Big Oneโ€™ just got more complicated
Scientists have discovered a massive tear in the tectonic plate off the coast of Vancouver Island. This "rip" suggests that the northern end of the Cascadia Subduction Zone is actually starting to shut down. The CBCโ€™s Johanna Wagstaffe investigates what this discovery might mean for the "Big One" off the coast of Vancouver Island.
#discovery #tectonic #cascadia #subduction #VancouverIsland
https://www.cbc.ca/player/play/9.7107713?cmp=rss
Timing And Style Of Tectonic Assembly And Exhumation Of The Mchugh Complex Within The Chugach-Kodiak Accretionary Wedge, Alaska
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https://doi.org/10.1029/2025TC009004 <-- shared paper
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https://discoveryalert.com.au/chugach-prince-william-terrain-geology-alaska-2025 <-- shared technical article
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[this paper is WAY over my head in terms of the nuance of structural geology, but still fascinating; further, I have to say: these are TRULY gorgeous, well-designed & presented, and useful geologic maps, cross-sections, annotated photographs and other visualisations (I am jealous of that level of skill, in the BEST of ways!)]
#geology #structuralgeology #fieldwork #geologic #mapping #KenaiPeninsula #McHughComplex #tectonics #underplating #faulting #subduction #erosion #Exhumation #ChugachKodiak #AccretionaryWedge #Alaska #coast #coastal #mineralogy #transects #crosssections #model #modeling #sampling #spectroscopy #accretionary #accretionarymargin #plateboundary #trench #interpretation #peneplanation #forearc

A #Subduction zone is a geological area where two tectonic plates collide, and one plate sinks or "subducts" beneath the other and is forced into the Earth's mantle.

This process is a result of density differences between the two plates and can trigger powerful #Earthquakes, volcanic eruptions, and #Tsunamis.

https://knowledgezone.co.in/kbits/69159c75eeb3621d436d25db

Rare blue yoderite replacing kyanite (-talc + quartz). Only found in two places on Earth (Tanzania and Zimbabwe), yoderite forms at high pressure in hot subduction zones from rocks rich in in Mg and Al, poor in alkalis and Ca, in the presence of water and oxidized ferric iron (ยฑMn).

Named after Hat Yoder of the Geophysical Lab, CIW.

#ThinSectionThursday #Yoderite #Kyanite #Whiteschist #Subduction #CarnegieInstitutionWashington #Tanzania #Zimbabwe