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In page Sudetes:

"

A NW-SE to WNW-ESE oriented strike-slip fault —the Intra-Sudetic fault— runs through the length of the Sudetes.[4] The Intra-Sudetic fault is parallel with the Upper Elbe fault and Middle Odra fault.[2] Other main faults at the sudetes are also NW-SE oriented, dextral and of strike slip type. These include the Tłumaczów-Sienna Fault and the Marginal Sudetic Fault.[8]