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#planetarygeology

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Magma ocean (Planetary science 🪐)

Magma oceans are vast fields of surface magma that exist during periods of a planet's or some natural satellite's accretion when the celestial body is completely or partly molten. In the early Solar System, magma oceans were formed by the melting of planetesimals and planetary impacts. Small planetesimals are melted by ...

en.wikipedia.org/wiki/Magma_oc

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

Accidentally exposed yellowish-green crystals reveal ‘mind-blowing’ finding on #Mars, scientists say

‘The #CuriosityRover has made its most unusual find to date on Mars: rocks made of pure sulfur. And it all began when the 1-ton rover happened to drive over a rock and crack it open, revealing yellowish-green crystals never spotted before on the red planet.’

#NASA
#JPL
#PlanetaryGeology

edition.cnn.com/2024/07/20/sci

A really big volcano appears to have been lurking unnoticed on Mars.

' The newfound volcano is 450 kilometers (280 miles) wide and, even eroded as it is, reaches elevations of more than 9 kilometers (close to 30,000 feet). It dwarfs Earth’s largest volcano, Mauna Loa, which is 8 km tall from seafloor to summit, and spans 120 kilometers on its largest side. Mars, however, tends to have larger volcanos .. '

#volcanoes #Mars #PlanetaryGeology #NoctisMons

skyandtelescope.org/astronomy-

Sky & Telescope · Giant Ancient Volcano Discovered on MarsScientists have identified a colossal volcano on Mars using satellite imagery. It was undetected for decades due to extensive erosion.

Cryovolcano (Volcanology 🌋)

A cryovolcano is a type of volcano that erupts volatiles such as water, ammonia or methane into an extremely cold environment that is at or below their freezing point. The process of formation is known as cryovolcanism. Collectively called cryomagma, cryolava or ice-volcanic melt, these substances are usually liquids and can form plumes, but can also be in vapour form. After th...

en.wikipedia.org/wiki/Cryovolc

Still in listening/learning mode in this space, but time for an #introduction. I’m Sarah, I live in #WashingtonDC. I am a #scientist and an #artist. I love the #SolarSystem and am more than a little obsessed with the #Moon. I’m working hard to make sure that when #NASA sends humans back to the #lunar surface we get the maximum #science value out of it. My cat #Luna is more famous than I am. #Artemis #SpaceExploration #planets #LunarGeology #PlanetaryGeology #sciart #watercolor #acrylic #graphite