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The Periadriatic Seam (or fault) is a distinct
Within the
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 ...
in Southern Europe
Southern Europe is the southern 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 countries and regions: Alb ...
, 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
The Southern Alps (; officially Southern Alps / Kā Tiritiri o te Moana) is a mountain range extending along much of the length of New Zealand's South Island, reaching its greatest elevations near the range's western side. The name "Southern ...
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, Cr ...
. It forms the division between the Adriatic plate 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
Eastern Alps is the name given to the eastern half of the Alps, usually defined as the area east of a line from Lake Constance and the Alpine Rhine valley up to the Splügen Pass at the Alpine divide and down the Liro River to Lake Como in t ...
, the line marks the border between the Central Eastern Alps
The Central Eastern Alps (german: Zentralalpen or Zentrale Ostalpen), also referred to as Austrian Central Alps (german: Österreichische Zentralalpen) or just Central Alps, comprise the main chain of the Eastern Alps in Austria and the adjacen ...
and the Southern Limestone Alps
The Southern Limestone Alps ( it, Alpi Sud-orientali, german: Südliche Kalkalpen), also called the Southern Calcareous Alps, are the ranges of the Eastern Alps south of the Central Eastern Alps mainly located in northern Italy and the adjacen ...
. In the Western Alps
The Western Alps are the western part of the Alpine Range including the southeastern part of France (e.g. Savoie), the whole of Monaco, the northwestern part of Italy (i.e. Piedmont and the Aosta Valley) and the southwestern part of Switzerland ( ...
it forms the division between the southern Apulian foreland and the central crystalline
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...
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 produ ...
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, fr ...
zone between Vienna
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and Friuli
Friuli ( fur, Friûl, sl, Furlanija, german: Friaul) is an area of Northeast Italy with its own particular cultural and historical identity containing 1,000,000 Friulians. It comprises the major part of the autonomous region Friuli Venezia Giuli ...
. 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 d ...
of the young orogen, which led to the formation of the Hohe Tauern
The High Tauern ( pl.; german: Hohe Tauern, it, Alti Tauri) are a mountain range on the main chain of the Central Eastern Alps, comprising the highest peaks east of the Brenner Pass. The crest forms the southern border of the Austrian states of ...
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 mat ...
. 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
* Upli ...
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 basin situated in south-east Central Europe. The geomorphological term Pannonian Plain is more widely used for roughly the same region though with a somewhat different sense, with only th ...
– 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
The Karawanks or Karavankas or Karavanks ( sl, Karavanke; german: Karawanken, ) are a mountain range of the Southern Limestone Alps on the border between Slovenia to the south and Austria to the north. With a total length of in an east–west dir ...
– 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 p ...
– Gail 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 o ...
*''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, stretch ...
– 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 ...
– Bruneck
Bruneck (; it, Brunico or Ladin: ''Bornech'' or ''Burnech''; la, Branecium or ''Brunopolis'' is the largest town in the Puster Valley in the Italian province of South Tyrol.
Geography
Bruneck rises up in the middle of a wide valley (perhaps ...
*''Giudicárie line
The Giudicarie Line is a major geologic fault zone in the Italian Alps, named for the Giudicarie valleys area. It runs from Meran in the northeast more or less straight along the lower part of the Val di Sole, along the Val Rendena (upper Sarca val ...
'': Meran
Merano (, , ) or Meran () is a city and ''comune'' in South Tyrol, northern Italy. Generally best known for its spa resorts, it is located within a basin, surrounded by mountains standing up to above sea level, at the entrance to the Passeier ...
– Val di Sole
Val may refer to: Val-a
Film
* ''Val'' (film), an American documentary about Val Kilmer, directed by Leo Scott and Ting Poo
Military equipment
* Aichi D3A, a Japanese World War II dive bomber codenamed "Val" by the Allies
* AS Val, a Sov ...
*''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 Ortl ...
– Val Camonica
Val Camonica (also ''Valcamonica'' or Camonica Valley, Eastern Lombard dialect, Eastern Lombard: ''Al Camònega'') is one of the largest valleys of the central Alps, in eastern Lombardy, Italy. It extends about from the Tonale Pass to ...
– 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. Tod ...
– Biella
Biella (; pms, Biela; la, Bugella) is a city and ''comune'' in the northern Italian region of Piedmont, the capital of the province of the same name, with a population of 44,324 as of 31 December 2017. It is located about northeast of Turin a ...
.
See also
* * *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