Scientists Surprised By Source of Largest Quake on Mars

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AnonymousAnonymous
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18 Oct 2023, 3:23 pm

https://www.reuters.com/technology/space/scientists-surprised-by-source-largest-quake-detected-mars-2023-10-18/


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Kraichgauer
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20 Oct 2023, 6:31 pm

The article talked about earthquakes, but shouldn't they be... wait for it... wait for it... Marsquakes? (Snark, snark!)


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naturalplastic
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20 Oct 2023, 7:11 pm

he article says that "Mars is not supposed to have plate tectonics".

I took a course, taught jointly by the astronomy and geology depts, in the latest discoveries on planetary geology back in the Seventies.


The consensus was that Mars had "incipient plate tectonics". Not as advanced as Earth. But like earth.

The bigger the planet the thinner the crust. Earth has a thinner crust so its crust breaks up into plates that scoot around on top of the mantle. Heavier ocean plates subduct under lighter continental plates. And continental plates ram int each other and thrust up mountains.

A hundred million years ago Europe and North America were one continent. But a big rift valley opened up ...got gradually wider...then it flooded with ocean water...it got wider ...and now its the three thousand mile wide North Atlantic that seperates Europe from America.

Africa is splitting apart right now as we speak at the two thousand mile long "Great Rift Valley".

Mars has a thick crust that doesnt break so readily. But it does have a structure similar in length width and depth to the Great Rift Valley of Africa. And that is Vallery Marinares. Sometimes called "the Martian Grand Canyon"( and articles hype it as being a zillion times the size our Grand Canyon). But in both size and in origin its not much like our grand canyon but is much like the African Rift Valley. Its not an erosional feature, but seems to have been caused by the crust pulling apart.