rewrite scientifically: For the Earth this scenario would provide a reasonable dynamical process that self-consistently generates  layered mantle flow with compositionally distinct reservoirs and has profound implications for the global thermal and compositional evolution of the Earth. It puts tight constraints on the thermal evolution of the core and thus the ability to maintain dynamo action and a global magnetic field. During the early stage of evolution the heat flow out of the core is reduced since the established layers act as an insulator. This would lead to a significantly reduced core cooling rate and would give rise to a late growth of the inner core resulting in a present-day inner core size$^{48}$. The inherent spatial and temporal variability of the system also offers an explanation for the geochemical variety of mantle-derived basalts$^{4,49}$. The recorded episodic growth of continental crust and supercontinents might then not be linked to mantle avalanches at the 660-km discontinuity$^{50}$ but induced due to the breakdown of individual layers$^{51}$ and the deepening of slab sinking$^{52}$. Assuming that a strict double-diffusive layering is overcome and the present day mantle is in the phase of turning over features like the seismically observed LLSVPs below Africa and the Pacific$^{5}$ might be remnants and with this an evidence for primordial double-diffusive layering with in the Earth mantle.
\\
This paragraph should underline that the proposed model does reproduce first order observations for Earth. We are of course aware that due to the uncertainties in the model parameter the exact values will change. But it nevertheless shows that they are in a reasonable range.
\\
Ruling out 	this process of layer formation for planetary mantle evolution (by assuming a strong exponential gradient for the composition) will make it difficult to explain a variety 	geochemical findings for example signatures found in modern flood basalts (NAME_1 et al. 	Preservation of Earth-forming events in the tungsten isotopic composition of modern flood 	basalts. Science, Vol. 352, 809-812, 2016). Provide your response in exactly 4 paragraphs (separated nearby paragraphs with 3 aterisk symbols ***).
user