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Posted on 08/30/2025 6:33:23 AM PDT by SunkenCiv
It started with a quiver deep down in the Martian crust weak, barely detectable, yet bearing 4.5-billion-year-old echoes. Those seismic waves, recorded by NASA's InSight lander from 2018 to 2022, have revealed a remarkable discovery: giant preserved fragments of Mars' primordial crust, trapped in the planet's mantle since the formation of the Solar System.
The discovery emerged from the painstaking analysis of eight exceptionally clear marsquake events by a team led by Constantinos Charalambous of Imperial College London. Using the Seismic Experiment for Interior Structure (SEIS), InSight recorded how primary (P) and secondary (S) waves traveled through the planet, reflecting and refracting off internal boundaries. Variations in wave speed and attenuation allowed researchers to map the mantle's composition, revealing rocky blocks up to 4 kilometers across, relics of the planet's earliest crust.
Their existence indicates a cataclysmic origin. "These colossal impacts unleashed enough energy to melt large parts of the young planet into vast magma oceans," Charalambous said. As these cooled, chemically different crustal rafts solidified and subsequently sank into the mantle, where Mars' stagnant-lid tectonics one immobile crustal shell trapped them. Plate tectonics on Earth would have already recycled such material into the mantle by now, wiping out the record.
(Excerpt) Read more at modernengineeringmarvels.com ...
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from the FRchives:
I knew about their violent past when I was four years old!
Thar’s gold in them crusts!
There’s supposed to be a kaboom.
There are plans to shoot a movie on Mars, a remake, slightly retitled — “The Angry Mauve Planet”.
This maybe a stupid question. But how did the molten lava cool on mars without any element present to cause that reaction?
Ok, not a stupid question if you are seriously asking. Cooling (or rather heat transfer) occurs anytime there is a temperature differential. Space is cold. The heat radiates out. Mars, being much farther from the sun absorbs much less solar radiation (heat) but the cold space takes all the Martian surface and atmosphere gives off. At some point an equilibrium is reached. On mars, that is well below freezing.
Mars has that one feature that crosses the entire planet that looks like a gigantic electro magnetic pulse of some sort. It blasted millions of tons of the surface into the air which probably crossed the entire planet for hundreds of years.
They’re much better now.
Mars has that one feature that crosses the entire planet that looks like a gigantic electro magnetic pulse of some sort. It blasted millions of tons of the surface into the air which probably crossed the entire planet for hundreds of years.
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