Granite as a long-running burner

Popular material turned into "stone of the year 2007"

Granite © Harald Frater
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Feldspar, quartz and mica - these are the mineral ingredients of granite, the "rock of the year 2007". Whether as a paving stone, polished floor tile or as facing stone on facades, the hard-wearing granite from many inner cities is indispensable. The granite is no longer just from German quarries, but comes from Italy, Southeast Asia or other parts of the world.

The granite is in its spread a true Globetrotter and probably one of the most famous rocks in Germany. Because in almost all low mountain ranges such as the Black Forest, Odenwald, Thuringian Forest, Fichtelgebirge, Erzgebirge or the Harz can be found the granite. However, granites from Scandinavia, which often have an interesting geological past, are also found in the sediments of the glacial moraine deposits in the north German lowlands. Particularly well-known are the imposing "Old Swedes" in Hamburg or the Markgrafensteine ​​east of Berlin.

Popular material in cities

But not only the hiker but also the urbanites encounter the granite usually at every turn. As a material, the rock finds numerous uses, be it as a paving stone, as a curb, as a pedestal of buildings, as a veneer of facades or as a polished floor tile. Accordingly, there are still quarries in Germany today in which granite was or will be obtained in different colors. But how does the rock that got its name through its visible graininess come into existence?

Each magmatic melt, which in its composition corresponds approximately to that of the earth's crust, strives for its cooling to a residual product of granitic composition. When rocks such as greywackes or slate, or other rocks containing a certain amount of silica, clay, and potassium and sodium, reach higher temperatures and pressures, a melt of granitic composition first forms, which can penetrate into clefts and clefts of the bedrock,

Thus, the granite is something like the beginning and end of magmatism and metamorphosis. That's why granite rocks are so common worldwide. At the same time, these interact with other natural phenomena such as soils, vegetation or the relief. Due to its importance as a working stone and asset, the Professional Association of German Geoscientists (BDG), together with the German Geological Society (DGG), has chosen granite as the "Rock of the Year 2007". display

(Professional Association of German Geoscientists (BDG), 21.03.2007 - AHE)