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  #1  
Old September 24th 18, 10:31 AM posted to sci.astro.amateur
Gerald Kelleher
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https://www.independent.co.uk/news/w...-a8551981.html

Our sister planet Venus has a substantially larger concentration of volcanoes than Earth while having no appreciable plate tectonics.

https://en.wikipedia.org/wiki/Volcanology_of_Venus

The similar sized Earth has a combination of plate tectonics and volcanoes hence the ability to compare planetary traits such as why Venus has a high atmospheric concentration of carbon dioxide or more importantly - why the Earth's rotation and specifically differential rotation of the fluid interior impacts the evolution of the surface crust.

An unmoderated newsgroups allows these speculative approaches to exist whereas it would be suffocated in another environment nevertheless it is all common sense and open for discussion among those who enjoy the challenge.

  #2  
Old September 25th 18, 07:16 PM posted to sci.astro.amateur
Gerald Kelleher
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From what I gather, when it seemed possible to link spherical deviation between Equatorial and Polar diameters with crustal evolution/motion of the Mid Atlantic Ridge via differential rotation, the community went berserk and tried to imply rotation as a factor without discipline or restraint.

Things have settled down somewhat for while it appears that there is a more reasonable approach to spherical deviation in terms of fluid interiors, the joined up thinking with plate tectonics and specifically the Mid Atlantic Ridge remains absent. The proposal for well over a decade is that there is a lag/advance mechanism which causes the symmetrical generation of crust either side of the Ridge based on an uneven rotational gradient from Equator to Poles -

https://www.youtube.com/watch?v=faywryDTmTE


It is always worth seeing researchers pull closer to a more productive approach to evolutionary geology via fluid dynamics or a round and rotating planet. It is just another instance where astronomy and terrestrial sciences mesh.
 




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