A bolón or berrueco It is a granite rock of large size and a rather round shape, which may appear resting on the surface of the ground or on another rock of the same nature. They are usually the result of decomposition and erosion that granite undergoes after the weathering process.
It is worth mentioning that although granite is an impermeable rock and very hard at the same time it is hyper sensitive to chemical decomposition. For example, water penetrates into its fissures and ice causes the stone to burst.
Meanwhile, these particular granite rocks are common to find in areas known as berrocales, because there is precisely a predominance of them.
Undoubtedly, the berrocales stand as one of the most unique rocky landscapes on the planet and as such arouse enormous attention and amazement from visitors when discovering them. Even and how could it be otherwise, they constitute authentic tourist attractions.
In Spain, for example, it is possible to find a large number of berrocales, La Pedriza, in the community of Madrid It is one of them. In La Pedriza we find ourselves in front of the largest berrocal of the European continent, grouping in it an endless number of bolones or beroko. The various processes that the rocks have undergone over the hundreds of years have caused them to adopt the rarest and most unusual shapes, and of course, this makes it a unique attraction that no one wants to miss on their visit to Madrid.
But in addition to the attractiveness of its particular landscape, this area of berrocal is very visited by those who practice climbing, since the different natural obstacles that the landscape proposes make it an ideal place for the challenge that this practice entails.
It should be noted that in more popular terms, this landscape composed of Ber Morocco is called chaos de bola (ball chaos).
