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http://www.cliffshade.com/colorado/i...d_atlantic.gif
The symmetrical generation of oceanic crust off the Mid Atlantic Ridge (MAR) and the orientation of the ridge itself with the Earth rotation requires a global mechanism to explain it,as a stationary Earth 'convection cells' would be hideous for this purpose,the highest probability is differential rotation in explaining not just the crustal evolutionary symmetry but the largely 'S' shape of the ridge that taper off towards the rotational poles. Rather than a lethargic viscosity favored by the 'convection cell' proponents,there is no reason to believe that the viscosity which emerges through volcanic eruptions and at crustal boundaries is much different beneath the fractured crust - http://www.youtube.com/watch?v=VsLSu...eature=related The lag/advance mechanism of differential rotation for crustal generation off the ridge works on the principle that the shear band moving faster than the beneath it and towards polar latitudes creates crust in a Westward direction while the slower moving band creates crust in the opposite direction,as that band is moving faster than the slower one beneath it,there is a constant creation of crust in both directions.The Romanche fracture zone at the Equator (a rotational characteristic) is indicative of a lag/advance mechanism dividing global hemispheres - http://upload.wikimedia.org/wikipedi...che_Trench.jpg The geologists have not been instructed on the generalized rules governing the rotating of viscous compositions in respect to celestial objects and specifically differential rotation but of course ,once differential rotation is front and center,it means discussing latitudinal speeds.They badgered me about citations but the one which is most relevant,the averaging process for the 24 hour day and steady daily rotation by one of the most eminent astronomers of the 17th century,Christian Huygens,is rejected. You want your 366 1/4 rotations in an orbital circuit via 'sidereal time' reasoning,something which can be disposed off in 20 minutes,and there is not the slightest sign that readers recognize what is waiting once that mistake is dealt with. |
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