Miro CollasPreviously Unknown 1 km Wide Impact Crater in China and Why It's So Exciting - YouTube
https://www.youtube.com/watch?v=aqutR88gwdY
YouTube
John Faithfull 🌍🇪🇺🏴🧡✊🏻✊🏿Nice wee #OpenAccess article on the discovery of possible impact ejecta from Earth's largest preserved impact structure - the Vredefort Dome, in South Africa.
https://www.sciencedirect.com/science/article/pii/S0301926825002803
Daniel FischerSouthward impact excavated magma ocean at the lunar South Pole–Aitken basin: https://www.nature.com/articles/s41586-025-09582-y -> The moon's biggest #ImpactCrater made a radioactive splash: https://news.arizona.edu/news/moons-biggest-impact-crater-made-radioactive-splash
Southward impact excavated magma ocean at the lunar South Pole–Aitken basin - Nature
Observations of the shape, topography, crustal thickness and surface composition of the South Pole–Aitken impact basin on the Moon suggest a southward impact trajectory and the excavation of a discontinuous remnant magma ocean from beneath the crust.
Daniel PomarèdeMartian Memories
Victoria Dunes
This view of dunes and ripples inside Victoria Crater was captured by the Opportunity rover, February 8, 2008 (Sol 1437); full credits in ALT.
#Mars #Opportunity #Victoria #Mars #sol1437 #rover #MERB #space #crater #VictoriaCrater #impactcrater #Martian #memories #OpportunityRover #MartianMemories #science #photography #Astrodon #history
The-14Cubic zirconia only forms under extreme temperatures, like those produced when an asteroid impacts Earth
#CubicZirconia #AsteroidImpact #MeteorCrater #Geology #NaturalZirconia #ExtremeHeat #ImpactCrater #Zircon #Minerals #NaturalPhenomena #RareMinerals
https://the-14.com/cubic-zirconia-only-forms-under-extreme-temperatures-like-those-produced-when-an-asteroid-impacts-earth/
#CubicZirconia #AsteroidImpact #MeteorCrater #Geology #NaturalZirconia #ExtremeHeat #ImpactCrater #Zircon #Minerals #NaturalPhenomena #RareMinerals
https://the-14.com/cubic-zirconia-only-forms-under-extreme-temperatures-like-those-produced-when-an-asteroid-impacts-earth/
A Paleoarchaean #ImpactCrater in the Pilbara Craton, Western Australia: https://www.nature.com/articles/s41467-025-57558-3 -> "we report the discovery of shatter cones in a complex, dominantly metasedimentary layer, the Antarctic Creek Member (ACM) [...]. The shocked rocks of the crater floor are overlain by (unshocked) carbonate breccias and pillow lavas, stratigraphically constraining the age of the impact to 3.47 Ga and confirming discovery of the only Archaean crater known thus far."
Martian Memories
Opportunity at Naturaliste
Naturaliste is a small crater about 15 meters in diameter on the plains of Meridiani, about 1 km south of Endurance crater. Captured by the Opportunity rover on Mars 2, 2005 (Sol 393); full credits in ALT.
#Opportunity #Naturaliste #Mars #sol393 #rover #MERB #space #crater #NaturalisteCrater #impactcrater #Martian #memories #OpportunityRover #MartianMemories #science #photography #Astrodon #history
Martian Memories
Opportunity meets Gumdrop
Named after the Apollo 9 command module's nickname, Gumdrop is a small crater (6 meters diameter) located on the edge of a larger, dark, filled-in crater. It was captured by the Opportunity Rover on May 30, 2011 (Sol 2612); full credits in ALT.
#Opportunity #Gumdrop #Mars #Sol2612 #rover #MERB #space #crater #GumdropCrater #impactcrater #Martian #memories #OpportunityRover #MartianMemories #science #photography #Astrodon #history #Apollo #Apollo9
OTD 2006 : Opportunity at Victoria Crater
#Mars Sep. 27, 2006 (Sol 951)
Credits: NASA/JPL-Caltech
#Opportunity #Mars #Sol951 #rover #OpportunityRover #MERB #space #Victoria #crater #VictoriaCrater #MeridianiPlanum #impactcrater #Martian #landscape #memories #memory #MartianMemories #science #geology #STEM #photography #blackandwhite #Astrodon #research #knowledge #OTD #engineering #history #Solarocks
💧🌏 Greg CocksEarth May Have Had A Ring System 466 Million Years Ago
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https://phys.org/news/2024-09-earth-million-years.html <-- shared technical article
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https://doi.org/10.1016/j.epsl.2024.118991 <-- 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
--
https://phys.org/news/2024-09-earth-million-years.html <-- shared technical article
--
https://doi.org/10.1016/j.epsl.2024.118991 <-- shared paper
--
“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…”
--
#GIS #spatial #mapping #model #modeling #geology #structuralgeology #planetarygeology #rings #climatechange #paleoclimate #Ordovician #asteroid #rochelimit #craters #impactcrater #crater #icehouse #meteorite #platetectonics #HirnantianIcehouse
Earth may have had a ring system 466 million years ago
In a discovery that challenges our understanding of Earth's ancient history, researchers have found evidence suggesting that Earth may have had a ring system that formed around 466 million years ago, at the beginning of a period of unusually intense meteorite bombardment known as the Ordovician impact spike.