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1.) Introduction

The idea of the expansion of the Earth, as an explanation for its present face, has already been formulated as a hypothesis by
O. C. Hilgenberg, 70 years ago. Later, it was then also impressively supported by other scientists such as P. Jordan [2],
H. Haber [3], [4], S. W. Carey [5], J. Maxlow  [6] et al.
The hypothesis of the Earth expansion not only convinces by its elegance, but it also explains many geological phenomena in a simple and natural way, such as, e. g.
- the distribution pattern of continents and oceans on the globe,
- The apparent bi-level distribution of altitude levels on the Earth surface,
- The exact match of the coast lines (shelves) of Africa and South America,
- The global net of Earth gaps, which are interpreted as stress gaps due to the Earth expansion,
- The development of volcanism, Earth quakes and mountain folding due to the decreasing curvature of the Earth crust.
Enough reasons therefore speaking for a better integration of the hypothesis of the EE into the scientifical discussion then up to now! Unfortunately, its acceptance still is prevented by the fact, scientists could not find an agreement for a plausible cause explaining why the Earth expands as much as the globe models, on which the EE theory is based, demand.
Many of the hypotheses proposed to support the EE theory so far, (ether stream hypothesis, thermo expansion, absorption of solar neutrinos etc., cannot convince, as they are built upon physically questionable presumptions. Contrary to asking for the cause of the EE, we also could proceed by asking: which consequences will result if we accept that the Earth expands.

2.) Relation between expansion rate and pressure relief in the Earth body

Astronomical data speak for the assumption, the Earth mass remains approximately constant or even slightly decreases with time, as light elements, mainly hydrogen, escape into space continuously [7] . In a ball- shaped body as our Earth, held together by the gravitation force and assuming constant mass  there exist, between radius r and gravitation pressure p, the relation [8], Fig. 1:
p ~ 1/r4   (1)
Thus, with an expanding Earth radius, an extremely strong pressure decrease comes along. This must lead to manifold phase changes and chemical transformations in the Earth materials by which, in turn, partly considerable volume increases must be released. Such a non- linear feedback process can, at least temporarily, lead to a chaotic expansion. It is also difficult to guess which influence a pressure decrease will have on the volume increase of atoms and molecules, as their behaviour under extremely high pressures has hardly been researched so far.
A question which has not been studied by science is: Which property and thickness had the atmosphere of the formerly much smaller primary earth and which pressure did it apply to the Earth surface?
 
 
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