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EternitySphere t1_iyh1kpp wrote
I thought it was already pretty well established Europa experienced tectonic shifting of the outer crust. It's incredibly easy to see areas that have older ice breaks that have completely shifted due to later plate shifting.
Not sure why someone would write a paper on something that's already so well known and easily seen / understood. Except to have filler for their published paper catalogue.
Awsum07 t1_iyhix11 wrote
Replication studies
GeoGeoGeoGeo OP t1_iykh0uc wrote
> It's incredibly easy to see areas that have older ice breaks that have completely shifted due to later plate shifting.
That's not true at all as is evident from the article itself had you cared to read it:
"... to best reconstruct the motion of the surface, large areas suspected to be plates in previous studies had to be broken into smaller subplates along less obvious boundaries. This observation helps explain why some prior studies found that large plates did not reconstruct well or behaved in other unexpected ways..."
>Not sure why someone would write a paper on something that's already so well known and easily seen / understood.
Contrary to your claim, this subject is not well known, easily seen or understood and is why researchers continue to refine their models. The fact is that this is still a very new subject (plate tectonics via ice) with little data comparatively speaking. I'll further add that plate tectonics on Earth is still a subject that continues to be refined as new methods are developed, and more data presented.
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xXx_coolusername420 t1_iyh1tug wrote
the world holds its breath
Smooth_Imagination t1_iyhk5ba wrote
I think what makes Earths plate tectonics the way it is, is oceans of sufficient depth and pressure so that the hydrothermal system operates to remove energy continuously and lead to accretion of minerals within the crust, and lubricates plates moving over each other.
Not sure the situation on Europa, but Mars never had enough gravity for that, and that it has the largest volcano implies that energy builds up and has to periodically escape, and as Venus has no surface water its crust appears to undergo periodic large resurfacings as well.
Tearakan t1_iyi0dxs wrote
Europa moves a lot because of Jupiter's gravity. It's ridiculously strong.
GeoGeoGeoGeo OP t1_iyg6xsu wrote
Research Paper (open access): Episodic Plate Tectonics on Europa: Evidence for Widespread Patches of Mobile-Lid Behavior in the Antijovian Hemisphere