Periadriatic Seam

The Periadriatic seam ( also Periadriatisches lineament ) with a total length of 700 km, the most important tectonic fault line in the Alps. Your name stems from the fact that it runs approximately parallel to the coastline of the Adriatic Sea in a sweeping arc. It separates the Southern Alps of the Eastern Alps or the Southern Limestone Alps of the Austrian Central Alps and runs through the entire Alpine S-shape between the Tyrrhenian Sea and southern Hungary or Slovenia.

Formation

The Scholl displacements along this fault line ran both horizontally and vertically. Thus, the Austroalpine nappes have been shifted from the Southern Alps in some places by several kilometers in height, so that north the crystalline came to the surface, while south of the line predominate sedimentary rocks, the tectonic events and metamorphoses that the Eastern and Western Alps towards the end of the Mesozoic captured (before about 100 million years ago), remained largely unaffected. It is believed that the Southern Alps have shifted from the original room of origin by about 50 to 100 km to the west.

Nature

The Periadriatic seam represents an old lineament, which existed long before the alpidischen orogeny. This is reflected, inter alia, to Variscan rock bodies, sediment wedges of Permotrias and up squat plutonic rocks (granite, tonalite ), referred to in geology as Periadriatika or Periadriatic intrusives. In their area, especially south of the Tauern Window, missing a noticeable piece altalpidisches the earth's crust. Everybody should be able to locate by R. Oberhauser (1980 ) and the missing root zone of the Northern Limestone Alps.

Course

The Periadriatic lineament is characterized by large longitudinal valleys most clearly morphologically and dips northwest of Turin as Insubric line among the younger Tertiary and Quaternary deposits of the Po Valley and draws just north of the Italian lakes in the Valtellina into it. From Sondrio from it continues with the Tonale line over the Aprica Pass and over the top Camonica valley to the Tonale pass back and forth to Dimaro in Val di Sole (Val di Sole ). In Dimaro it meets at an acute angle to the Judicaria line that pulls in a straight line from Idrosee about Madonna di Campiglio. The main fault line continues through Malé and Proveis and draws on the Hofmahdsattel and through the valley to the outer Marauner Val d'Ultimo towards Meran. There, she runs through the Naif Valley into upper Penser valley and over the Penser yoke by mouth.

From there it follows the Pusteria line the distinctive longitudinal valley through which it separates the limestones of the Dolomites from the north adjacent tertiary tonalite in the Eastern Alps and the Tauern window. It forms the northern outer edge of Brixen granite and runs through the village of Vals to Stollberg saddle to Terenten and Kien, where the Brixen granite submerged about 2 kilometers east of Kien. About Brunico pulls the fault on the north side of the main valley to the Drau Valley in Sillian. There, they will be replaced by the Gail Valley line, which then as Karavanken line up - which divides the mountain range in North and Southern Karawanken - can be traced to the Eastern Alps edge or Pohorje on. To the east, it finally dips below the Tertiary and Quaternary deposits of the Pannonian Basin and disappears. Previously branches near the border triangle Austria - Italy - Slovenia the Save line to the southeast and south.

Overview:

• Drava line ( Slovenian Drau - Jauntal - Rosental )
• Gail Pusteria line ( iG - Val Pusteria - Brunico )
• Merano
• Tonale Line (Val di Sole - Passo Tonale - Valcamonica )
• Valtellina - Biella - Gulf of Genoa