Nordic Walking Highlight
The Frankish line is a major geological fault in Central Europe. It delimits the Tafeldeckgebirge of the South German stratified stage east and northeast against the Variscan basement of the Thuringian-Franconian-Vogtland slate mountains (including the Münchberger gneiss mass), the Fichtelgebirge and the Upper Palatinate Forest. The Franconian line runs geographically from northwest to southeast from Kronach to Weiden.
This fault line penetrates the entire earth's crust to a depth of over 30 km. Along this line, the northeastern Bavarian basement was pushed onto the rocks to the west and thus lifted out. The reason for this was the formation of the Alps.
The Franconian line with its current postponement character arose already at the end of the Variscan orogeny from a reactivation of an even older leaf displacement. It probably had its most active phase between 100 and 50 million years BC, when the foreland was pushed under the Fichtelgebirge or Oberpfälzer Wald with its Variscan granite bodies, pre-variscic gneisses, Paleozoic metasediments and metabase slices. Parts of the foreland were already filled with sediments from the Rotliegend, with time the existing basins increased with the further lowering of the foreland compared to the delivery areas. In addition to the vertical offset, which is between 1000 m at Wirsberg and 10,000 m in other areas, it probably has a dextral component today.
April 25, 2019
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