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#platetectonics

2 posts2 participants0 posts today
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formuchdeliberation

North America is ‘dripping’ down into Earth’s mantle, scientists discover | Live Science…

Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust above it to "drip" and suck down rocks from across the continent... #geology #platetectonics #geoscience #northamerica #geography

formuchdeliberation.wordpress.

for much deliberation · North America is ‘dripping’ down into Earth’s mantle, scientists discover | Live Science…Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust above it to “drip” and suck down rocks from across the contin…
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formuchdeliberation

The Brighter Side of News: Breakthrough study finds that Earth has six continents not seven…

The study argues that the traditional division of continents might not be as clear-cut as we think. According to the findings, North America and Europe—separated by the Atlantic Ocean—may still be geologically linked... #geography #platetectonics #geology #earthscience

formuchdeliberation.wordpress.

for much deliberation · The Brighter Side of News: Breakthrough study finds that Earth has six continents not seven…The study argues that the traditional division of continents might not be as clear-cut as we think. According to the findings, North America and Europe—separated by the Atlantic Ocean—may still be …
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formuchdeliberation

Interesting facts #196 ~ When did plate tectonics begin?…

Unlike every other known planet in the universe, Earth's surface is made up of rigid plates that shift, crash into each other and dive into the planet's interior... #geography #geology #interestingfacts #earthscience #geologicaltime #platetectonics Read more about plate tectonics @ Live Science:

formuchdeliberation.wordpress.

for much deliberation · Interesting facts #196 ~ When did plate tectonics begin?…Unlike every other known planet in the universe, Earth’s surface is made up of rigid plates that shift, crash into each other and dive into the planet’s interior… #geography #geol…
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Bill Minarik

Quebec has industrial quantities of kyanite -although I don't think any are being mined today. They're in the Grenville, the roots of the Himalayan-scale mountains formed over a billion years ago. The screenshot below is from MinDat: mindat.org/locentries.php?p=14

The Ministère has an awkwardly translated page "Mineral Substances in Quebec" that includes Kyanite in its list of wealth:
gq.mines.gouv.qc.ca/portail-su

A screenshot of the MinDat page on Kyanite in Quebec. The blue 'hammer and pick' icon denotes the Narco deposit NE of North Bay. Above are images of kyanite from the Narco deposit, Temiscamingue, Quebec
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#MinCup24#Kyanite#Quebec
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💧🌏 Greg Cocks

New Theory On Why We Are Alone In The Cosmos - Tectonic Plates | Plate Tectonics Might Only Occur On 0.003% Of Planets; That Makes Earth Very Special Indeed
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forbes.com/sites/jamiecartereu <-- shared media article
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universetoday.com/167659/plate <-- shared technical article
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doi.org/10.1038/s41598-024-547 <-- shared paper
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#geology #structuralgeology #life #universe #everything #platetectonics #oceans #continents #earth #complexlife #drakeequation #evolution #biology #nutrients #oxygen #oxygenation #water #hydrology #climate #habitat #ecosystems #erosion

graphic - the last 1.6 Gyr of Earth's tectonic history
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schematics - Summary diagrams showing how plate tectonics stimulates life and evolution whereas a single lid tectonic style retards life and evolution.
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graphic - The Drake Equation, a mathematical formula for the probability of finding life or advanced civilizations in the universe.
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charts / graphics - Evolution of Earth’s tectonic regime over the past 1.6 Ga.
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Public *
💧🌏 Greg Cocks

Earth May Have Had A Ring System 466 Million Years Ago
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phys.org/news/2024-09-earth-mi <-- shared technical article
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doi.org/10.1016/j.epsl.2024.11 <-- shared paper
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“HIGHLIGHTS:
• Earth may have had a ring during the middle Ordovician, from ca. 466 Ma.
• Breakup of an asteroid passing within Earth's Roche limit likely formed the ring.
• Among several features preserved is a near-equatorial band of impact craters.
• Shading of Earth by the ring may have triggered a global icehouse period…”
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#GIS #spatial #mapping #model #modeling #geology #structuralgeology #planetarygeology #rings #climatechange #paleoclimate #Ordovician #asteroid #rochelimit #craters #impactcrater #crater #icehouse #meteorite #platetectonics #HirnantianIcehouse

graphic - close up of rocks / asteroids making up the rings around Saturn
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maps - Areas of continental crust distal to the equator during the Ordovician. Areas older than Ordovician are indicated in salmon colour, Ordovician rocks are dark blue, and younger are in grey. Light blue indicates lakes in Africa. The labelled point (L) in Africa is the Luizi impact structure, which has a very poorly defined age that could plausibly be Ordovician, constrained to be between 0 and 573 Ma
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map - Positions of the Ordovician impact craters on the reconstructed plate positions of the MER21 model, showing the movement of continents and trace of impact sites from 467 to 450 Ma. AMZ, Amazonia; ANT, Antarctica; AS, Arabian Shield; AUS, Australia; AZ, Azania; BAL, Baltica; IND, India; LAU, Laurentia; NC, North China; SA, Southern Africa; SAH, Saharah; SC, South China; SEA, South-eastern South America; SIB, Siberia; SSA, Southern South America; T, Tarim; WAF, West Africa.
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maps - Areas of continental crust proximal to the equator during the Ordovician. Areas older than Ordovician are indicated in salmon colour, Ordovician rocks are dark blue, and younger are grey. Light blue indicates lakes in Europe and Russia. The labelled pink points are the recognised Ordovician impact spike craters: in Australia, Lawn Hill (LH); in North America, Tunnunik (T), Pilot (P), Lac Couture (LC), East Clearwater Lake (ECw), La Moinerie (LM), Charlevoix (Ch), Brent (B), Slate Islands (SI), Rock Elm (RE), Decorah (D), Calvin (Ca), Glasford (G), Ames (A); in Europe, Lochne (Lo), Malingen (M), Granby (G), Tvaren (T), Hummeln (H), Ilyinets (Iy) and Kardla (Ka) (the latter two are situated on the western edge of the map for Russia). The labelled black points are impact structures with very poorly defined ages that could plausibly be Ordovician in age (Parisi et al., 2024; Schmieder and Kring, 2020), but have not been included in [their] considerations: Goyder (Gy), Glikson (Gl), Matt Wilson (M), Woodleigh (W), Liverpool (L), Glover Bluff (GB), Crooked Creek (CC), Santa Fe (SF), Holleford (H), Île Rouleau (IR), Presqu’île (P), Lumparn (L), Saarijärvi (Sj), Summanen (Sm), Kamenetsk (K), Ramgarh (R).
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