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Posted by / 04-Nov-2019 02:15

Based on this problem Pavlenkova concludes: "This means that the movement of lithospheric plates over long distances, as single rigid bodies, is hardly possible.

Moreover, if we take into account the absence of the asthenosphere as a single continuous zone, then this movement seems utterly impossible." She states that this is further confirmed by the strong evidence that regional geological features, too, are connected with deep (more than 400 km) inhomogeneities and that these connections remain stable during long periods of geologic time; considerable movement between the lithosphere and asthenosphere would detach near-surface structures from their deep mantle roots." The very process or "driving force" of plate movement is also coming under fire.

It seems like crust is being produced in more areas than it is being subducted. Certain specific examples are also interesting, such as the African plate.

However, only about 40,000 km of ocean trenches and "collision zones" exist.Scholl and Marlow (1974), who support plate tectonics, admitted to being "genuinely perplexed as to why evidence for subduction or offscraping of trench deposits is not glaringly apparent." In order to maintain their theory, plate tectonicists have had to resort to the notion that unconsolidated deep-ocean sediments can easily slide under overlying plates without being scraped off or leaving any other significant trace behind.Also, these trenches often show a very low level of seismicity and often have flat-lying sediments at their bases that are not angled as if they were being subducted.This might seem like an obvious expectation, except for the fact that it is not observed in real life.The ocean trenches do not have enough sediment in them if subduction has truly occurred in these areas over the course of millions of years.

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The hypothesizes directional movements of the plates themselves are also being questioned using "space-geodetic techniques" such as "very long baseline interferometry (VLBI), satellite laser-ranging (SLR), and the global positioning system (GPS).