The Periadriatic Seam (or fault) is a distinct

geologic fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...

Southern Europe Southern Europe is the southern regions of Europe, region of Europe. It is also known as Mediterranean Europe, as its geography is essentially marked by the Mediterranean Sea. Definitions of Southern Europe include some or all of these countrie ...

, running ''S-shaped'' about from the

Tyrrhenian Sea The Tyrrhenian Sea (; it, Mar Tirreno , french: Mer Tyrrhénienne , sc, Mare Tirrenu, co, Mari Tirrenu, scn, Mari Tirrenu, nap, Mare Tirreno) is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenian pe ...

through the whole Southern Alps as far as

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia a ...

. It forms the division between the

Adriatic plate The Adriatic or Apulian Plate is a small tectonic plate carrying primarily continental crust that broke away from the African Plate along a large transform fault in the Cretaceous period. The name Adriatic Plate is usually used when referring ...

and the

European plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and ...

Tectonics and geology

Within the Eastern Alps, the line marks the border between the Central Eastern Alps and the Southern Limestone Alps. In the Western Alps it forms the division between the southern Apulian foreland and the central crystalline zones of the Alps.

Continental collision In geology, continental collision is a phenomenon of plate tectonics that occurs at convergent boundaries. Continental collision is a variation on the fundamental process of subduction, whereby the subduction zone is destroyed, mountains prod ...

is still going on, with the Apulian and European plates still converging. The central zones of the Alps are rising too, causing vertical slip along the fault. The result is the set of major fault zones collectively named Periadriatic Seam. Movement along the Periadriatic Seam is the cause for the

earthquake An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ...

zone between

Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...

and Friuli. The last destructive earthquake happened in Friuli at the end of the 20th century. The uplift caused violent

erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distin ...

of the young orogen, which led to the formation of the

Hohe Tauern The High Tauern (plural, pl.; german: Hohe Tauern, it, Alti Tauri) are a mountain range on the Main chain of the Alps, main chain of the Central Eastern Alps, comprising the highest peaks east of the Brenner Pass. The crest forms the southern bor ...

window A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent materia ...

. At several regions a heavy

uplift Uplift may refer to: Science * Geologic uplift, a geological process ** Tectonic uplift, a geological process * Stellar uplift, the theoretical prospect of moving a stellar mass * Uplift mountains * Llano Uplift * Nemaha Uplift Business * Uplif ...

of the Central Alps by some kilometers took place, and also a shift of more than 50 km.

Geographic position and names

From east to west, the course of the Periadriatic Seam and the names given to it regionally are as follows: *''Drau line'':

Pannonian Basin The Pannonian Basin, or Carpathian Basin, is a large Sedimentary basin, basin situated in south-east Central Europe. The Geomorphology, geomorphological term Pannonian Plain is more widely used for roughly the same region though with a somewh ...

–

Pohorje Pohorje (), also known as the Pohorje Massif or the Pohorje Mountains (german: Bachergebirge, ''Bacherngebirge'' or often simply ''Bachern''), is a mostly wooded, medium-high mountain range south of the Drava River in northeastern Slovenia. Acco ...

– Karawanks –

Drau The Drava or Drave''Utrata Fachwörterbuch ...

valley (''Jauntal, Rosental'') – Rosegg *''Gailtal line'':

Villach Villach (; sl, Beljak; it, Villaco; fur, Vilac) is the seventh-largest city in Austria and the second-largest in the federal state of Carinthia. It is an important traffic junction for southern Austria and the whole Alpe-Adria region. , the po ...

–

Gail Gail may refer to: People *Gail (given name), list of notable people with the given name Surname * Jean-Baptiste Gail (1755–1829), French Hellenist scholar * Max Gail (born 1943), American actor * Sophie Gail (1775–1819), French singer and ...

valley –

Kartitsch Kartitsch is a municipality in the district of Lienz in the Austrian state of Tyrol. Geography Kartitsch lies on both sides of the Gail River, near its confluence with the Puster Valley. The municipal area of Kartitsch is bounded in the north of t ...

*''Pustertal line'':

Sillian Sillian is a market town in the district of Lienz, in the Austrian state of Tyrol. Geography The municipality, at a height of about , is the main settlement in the East Tyrolean '' Hochpustertal'', the eastern part of the Puster Valley, stretchi ...

–

Puster Valley The Puster Valley ( it, Val Pusteria ; german: Pustertal, ) is one of the largest longitudinal valleys in the Alps that runs in an east-west direction between Lienz in East Tyrol, Austria, and Mühlbach near Brixen in South Tyrol, Italy. The Sou ...

– Bruneck *'' Giudicárie line'': Meran – Val di Sole *''Tonale'' or ''Insubric line'':

Tonale Pass Tonale Pass ( it, Passo del Tonale) (el. 1883 m./6178 ft.) is a high mountain pass in northern Italy across the Rhaetian Alps, between Lombardy and Trentino. It connects Valcamonica and Val di Sole. It is delimited by the Ortler Al ...

– Val Camonica –

Valtellina Valtellina or the Valtelline (occasionally spelled as two words in English: Val Telline; rm, Vuclina (); lmo, Valtelina or ; german: Veltlin; it, Valtellina) is a valley in the Lombardy region of northern Italy, bordering Switzerland. Toda ...

– Biella.

References

{{Authority control Geology of the Alps Regional geology Geology of Austria Geology of Hungary Geology of Italy Geology of Slovenia Geology of Switzerland Central Alps Southern Limestone Alps Suture zones

Tectonics and geology

Geographic position and names

See also

References