What is the geometrical interpretation of Machu Picchu?

Machu Picchu steep slope

Theories about the alignment of rocks have been made by various scientists, researchers and historians since the last decade. But they didn’t find any solid proof of their alignment, how they can resist the seismic waves for so many years. According to researches, the cutting of the rocks and stones, with different shapes and sizes placed properly, the use of locally available rocks from the Urubamba river, the  use of locally made tools used during constructions, etc. are a few important points to look for the answer of the given question.

I have gone through a few texts and videos about the wonder of the World. Experts are of the opinion that there is no geometrical formula of the town planning of the citadel. I totally agree with them. But the citadel has some underlying geometrical interpretation, i.e. the alignment of rocks on the slopes of the mountain with the fault plane beneath them. 

The stairs

 The polygonal shape of the rocks helps to fit in properly. The edges are usually carved sharp for proper fitting. In times of earthquakes, the rocks tremble as there very less cementing material in between. But they settle down well in their respective places and lock themselves in the predefined orientations. There are structures which are big in size and have a tendency to fall down soon. The structures are too very stable. 

The geometry of alignment of rocks are precise

 

The reason is because the rocks used are well locked and balanced. They are placed in such a way that even if seismic waves attack them, the direction of the attack will always be in a particular way. The Centre of mass and the Centre of gravity are well balanced and beneath the geometrical center so that there is stable equilibrium. Again the foundation is of the citadel is made of different sizes and shapes of rocks, mixed with the soil to have the stability. Thus, the citadel as a whole is really a wonder of earthquake engineering. 

The steep slope

 I think the design of the citadel should be practiced in our present day structures. Although it will be a tedious work, but, it sure will resist the high magnitude seismic waves.