scholarly journals Evolution of the Alpine orogenic belts in the Western Mediterranean region as resolved by the kinematics of the Europe-Africa diffuse plate boundary

Author(s):  
Paul Angrand ◽  
Frédéric Mouthereau

The West European collisional Alpine belts are the result of the inversion, initiated in the middle Cretaceous, of the complex western Neotethys and the Atlantic continental rift domains and closure of remnants of Tethys between North Africa and European cratons. While the kinematics of Africa relative to Europe is well understood, the kinematics of microplates such as Iberia and Adria, within the diffuse collisional plate boundary, are still a matter of debate. We review geological and stratigraphic constraints in the peri-Iberia fold-thrust belts and basins to define the deformation history and crustal segmentation of the West European realm. These data are then implemented with other constraints from recently published kinematic and paleogeographic reconstructions to propose a new regional tectonic and kinematic model of the Western Europe from the late Permian to recent times. Our model shows that the pre-collisional extension between Europe and Africa plates was distributed and oblique, hence building discontinuous rift segments between the southern Alpine Tethys and the Central Atlantic. They were characterised by variably extended crust and narrow oceanic domains segmented across transfer structures and micro-continental blocks. The main tectonic structures that are inherited from the late Variscan orogeny localized both rifting and orogenic belts. We show that several continental blocks, including the Ebro-Sardinia-Corsica block, have been key in accommodating strike-slip, extension, and contraction in both Iberia and Adria. Its existence further allows refining the tectonic relationship between Iberia, Europe and Adria in the Alps. By the Paleogene, the convergence of Africa closed the spatially distributed oceanic domains, except for the Ionian basin. From this time onwards, collision spread over the different continental blocks, allowing an efficient transfer of the deformation from Africa to Europe. The area was eventually affected by the West European Rift, in the late Eocene, which may have influenced the opening of the West Mediterranean. The low convergence associated with collisional evolution of Western Europe permits to resolve the control of the inherited crustal architecture on the distribution of strain in collision zone, that is otherwise lost in more mature collision domain such as the Himalaya.

Author(s):  
Serhiy Blavatskyy

It has been attempted to make an empirical study of the framing of the Jewish pogroms upon the Ukrainian terrains in 1919 in the Ukrainian press in the West European languages in Europe (1919―1920s). For the first time, in the communication and media studies discourses, there have been elicited new, previously unknown, findings of specificity of the framing of the Jewish pogroms in the Ukrainian foreignlanguage periodicals. Those were: «Bulletiner fra det Ukrainske Pressburo» (Copenhagen, 1919—1920s), «La Voce dell “Ucraina”» (Roma, 1919—1920s), «The Ukraine» (London, 1919—1920s), «Bureau Ukrai nien de Presse: Bulletin d’Informations» (Paris, 1919—1920s), «France et Ukraine» (Paris, 1920), «L’Europe Orientale» (Paris, 1919—1920s), «Die Ukraine» (Berlin, 1918—1926s). First, it has been elucidated that the «attribution of responsibility» frame was dominant in the content of the Ukrainian foreign-language press in Western Europe. Second, the conclusion about dialectic of the frames of «attribution of responsibility» and «morality» in the coverage of the Jewish pogroms upon the Ukrainian terrains has been made. In this regard, we conclude that the «morality» frame was connected with the internationalization of this problematic in the geopolitical discourse of international relations of the postwar period. On the contrary, the frame of «attribution of responsibility» was linked to localization of the Jewish question in the multilateral conflict on the Ukrainian territories in 1919. The main conclusion of this paper is that the coverage of the Jewish pogroms in the Ukrainian foreign-language press in Europe was made primarily in counterpropaganda purposes. The follow-up studies are to make a comparative study of the stereotypes about Jews’ perception in the Ukrainian-language press both in Ukraine and abroad (in Europe or the USA), as well as in the West European and American press of the Ukrainian Revolution period (1917―1921s). Thus, these future studies will either refute or confirm the validity of the findings and conclusions of this research. Keywords: framing, the Jewish pogroms, the Ukrainian terrains, the foreign-language press, Europe.


2020 ◽  
Author(s):  
Derya Gürer ◽  
Roi Granot ◽  
Douwe J.J. van Hinsbergen

<p>The relative motions of the tectonic plates show remarkable variation throughout Earth’s history. Major changes in relative motion between the tectonic plates are traditionally viewed as spatially and temporally isolated events linked to forces acting on plate boundaries (i.e., formation of same-dip double subduction zones, changes in the strength of the boundary), or thought to be associated with mantle dynamics. A Cretaceous global plate reorganization event has been postulated to have affected all major plates. The Cretaceous ‘swing’ in Africa-Eurasia relative plate motion provides an ideal test-bed for assessing the temporal and spatial evolution of both relative plate motions and surrounding geological markers. Here we show a novel plate kinematic model for the closure of the Tethys Ocean by implementing intra-Cretaceous Quiet Zone time markers and combine the results with the geological constraints found along the convergent plate boundary. Our results allow to assess the order, causes and consequences of geological events and unravel a chain of tectonic events that set off with the onset of horizontally-forced double subduction ~105 Myr ago, followed by a 40 Myr long period of acceleration of the Africa relative to Eurasia that peaked at 80 Myr ago (at rates four times as high as previously predicted). This acceleration, which was likely caused by the pull of two same-dip subduction zones was followed by a sharp decrease in plate velocity, when double subduction terminated with ophiolite obduction onto the African margin. These tectonic forces acted on the eastern half of the Africa-Eurasia plate boundary, which led to counterclockwise rotation of Africa and sparked new subduction zones in the western Mediterranean region. Our analysis identifies the Cretaceous double subduction episode between Africa and Eurasia as a link in the global plate tectonic chain reaction and provides a dynamic view on plate reorganizations.</p>


2001 ◽  
Vol 3 (2) ◽  
pp. 3-27 ◽  
Author(s):  
Silvio Pons

Soviet policy toward the Italian Communist Party (PCI) from 1943 to 1948 exemplified Josif Stalin's complicated relationship with the West European Communist parties and Western Europe in general. For a considerable while, Stalin insisted that the PCI follow a policy of moderation. Palmiro Togliatti, the leader of the PCI, heeded Stalin's orders and tried to ensure that the Italian Communists pursued a policy of national unity and avoided conflicts that might lead to civil war in Italy. But this moderate approach collapsed after the Soviet Union rejected the Marshall Plan in 1947 and thereby forced the West European Communist parties into extra-parliamentary opposition. Not until after the poor showing of the PCI in the 1948 Italian elections was the party able to regain a viable role. Stalin's conflicting advice to the PCI was indicative of his tenuous grasp of the situation in Western Europe.


2020 ◽  
Author(s):  
Eulàlia Gràcia ◽  
Ingo Grevemeyer ◽  
Rafael Bartolomé ◽  
Héctor Perea ◽  
Sara Martínez-Loriente ◽  
...  

<p>Large continental faults extend for thousands of kilometres and often form the tectonic boundaries between plates that are associated with prominent topographic features. In these active areas, well-defined faults produce large earthquakes, and thus imply a high seismic hazard. These paradigms are called into question in the Alboran Sea, which hosts an allegedly complex diffuse boundary between the Eurasia and Nubia plates, and we discovered one of the few examples worldwide of the initial stages of these key tectonic structures. On the 25th January 2016, a magnitude M<sub>w</sub>6.4 submarine earthquake struck the north of the Moroccan coast, the largest event ever recorded in the Alboran Sea. The quake was preceded by an earthquake of magnitude M<sub>w</sub>5.1 and was followed by numerous aftershocks whose locations mainly migrated to the south. The mainshock nucleated at a releasing bend of the poorly known Al-Idrissi Fault System (AIFS). According to slip inversion and aftershock distribution, we assume a rupture length of 18 km. Here we combine newly acquired multi-scale bathymetric and marine seismic reflection data with a resolution comparable to the studies on land, together with seismological data of the 2016 M<sub>w </sub>6.4 earthquake offshore Morocco – the largest event recorded in the area – to unveil the 3D geometry of the AIFS. We found that, despite its subdued relief, the AIFS is a crustal-scale boundary. We report evidence of left-lateral strike-slip displacement, characterize their fault segments and demonstrate that the AIFS is the source of the 2016 events. The occurrence of the M<sub>w </sub>6.4 earthquake and previous events of 1994 and 2004 supports that the AIFS is currently growing through propagation and linkage of its segments, which eventually might generate a greater rupture (up to M<sub>w</sub> 7.6), increasing the potential hazard of the structure. The AIFS provides a unique model of the inception and growth of a young plate boundary system in the Alboran Sea (Western Mediterranean).</p><p>This work has been recently published in <em>Nature Communications (IF:12.35)</em>, <strong>10, </strong>3482 (2019) doi:10.1038/s41467-019-11064-5. I would like to present our article recently published in NCOMM, so, please consider our work for an ORAL INVITED presentation. Many thanks!</p>


2006 ◽  
Vol 85 (2) ◽  
pp. 131-180 ◽  
Author(s):  
W. Sissingh

AbstractSequence stratigraphic correlations indicate that intermittent changes of the kinematic far-field stress-field regimes, and the associated geodynamic re-organisations at the plate-tectonic contacts of the African, Apulian, Iberian and European plates, affected the Tertiary palaeogeographic evolution of the West European Platform through a combination of intra-plate tectonics and fluctuations of relative sea level. A temporal sequence of first-order stages in structural, palaeotopographic and palaeohydrographic development of the platform can be distinguished from the Paleocene onwards. These formative stages are closely linked to major plate-boundary events involving the development of the Pyrenean and Alpine orogens, and can be traced throughout the West European Platform.


Slavic Review ◽  
1972 ◽  
Vol 31 (1) ◽  
pp. 52-70 ◽  
Author(s):  
Jeanette E. Tuve

In the nineteenth century Russia and the United States emerged as nations on the periphery of the West European economic and political vortex. Their relations with each other had been, for the most part, prompted by or integrated with some larger issue involving the powers of Western Europe. Economic relations were no exception. Both nations were traditionally exporters of raw materials to industrialized, urbanized nations, which in turn were prepared and eager to exchange manufactured goods for raw materials. Russian and American products were therefore competitive rather than reciprocal, and profitable mutual exchange of goods had not developed. Both nations were debtor nations and had relied on the surplus capital of the small and large investors of Western Europe to provide the beginnings of internal transportation and industrialization.


1957 ◽  
Vol 20 (1) ◽  
pp. 409-416 ◽  
Author(s):  
Bernard Lewis

I suppose that most textbooks of European history or of world history—which in European textbooks is much the same thing—contain a chapter called ‘The Age of the Discoveries’, or something of the kind, which deals with the period from the fifteenth century onwards when Western Europe set about discovering the rest of the world. My subject to-day is another and earlier discovery, in which the West European was not the explorer going forth to discover the barbarian, but the barbarian discovered by the explorer—the Muslim explorer. My purpose is to outline, very briefly, the sources, nature, and stages of growth of Muslim knowledge concerning Western Europe, first in the obscure centuries before the Crusades, then during that great offensive of Western Christendom against Islam, of which the expeditions to Palestine were the easternmost expression.


1986 ◽  
Vol 12 (4) ◽  
pp. 265-278
Author(s):  
Gerald Segal

China and western Europe share a common concern—their powerful neighbour the Soviet Union. Yet it is only in the past three years that Chinese and west European attitudes towards the Soviet Union have begun to converge. The absence of any previous Sino-European agreement on the role of, and reaction to, the Soviet Union has primarily been due to the vagaries of Chinese policy. Despite Chinese assertions and west European self-flagellation, in the past 35 years the west has been stable and largely secure, whereas China has been changeable and largely insecure. Yet despite recent converging trends in Sino-west European views of the Soviet Union, there are important reasons why both China and western Europe will continue to differ in how they meet the Soviet challenge.


2013 ◽  
Vol 87 (5) ◽  
pp. 826-841 ◽  
Author(s):  
Richard L. Squires

The west coast of North America record of the shallow-marine stromboid gastropod genusRimellaAgassiz, 1841 is restudied for the first time in 90 years. This genus comprises a small group of Paleogene gastropods characterized by having an ornamented fusiform shell, a posterior canal ascending the spire, and simple (non-flared) outer lip.Rimella, whose familial ranking has been inconsistent, is placed here in family Rostellariidae Gabb, 1868, subfamily Rimellinae Stewart, 1927.EctinochilusCossmann, 1889;MacilentosClark and Palmer, 1923;VaderosClark and Palmer, 1923; andCowlitziaClark and Palmer, 1923 are recognized here as junior synonyms ofRimella. Four species are recognized from the west coast of North America: early to middle EoceneRimella macilentaWhite, 1889; early EoceneRimella oregonensisTurner, 1938; middle to late EoceneRimella supraplicata(Gabb, 1864) new combination, of whichRostellaria canaliferGabb, 1864,Cowlitizia washingtonensisClark and Palmer, 1923, andCowlitzia problematicaHanna, 1927 are recognized here as junior synonyms; and late EoceneRimella elongataWeaver, 1912.Rimellawas a warm-water gastropod whose earliest known record is of early Paleocene (Danian) age in Pakistan. Other than the west coast of North America,Rimellais found in Eocene strata in western Europe, Turkey, Egypt, Pakistan, southeastern United States, Panama, Peru, and, to a lesser degree, in Trinidad, Columbia, Java, and New Zealand. Global cooling near the end of the Eocene greatly diminished the genus. Its youngest known occurrences are of early Oligocene age in Germany, Italy, England, and Peru.


2018 ◽  
Vol 27 (1) ◽  
pp. 4-17 ◽  
Author(s):  
Kevin R Cox

In the Anglophone literature on local and regional development policy there are tendencies to overextension of claims from one side of the Atlantic to the other, or there is no comparative framing at all. As a result the specificity of the West European case tends to be lost. In contrast with the USA, the West European instance is very different indeed. Although there have been changes since the postwar golden years of urban and regional planning, central government remains crucial in the structuring of local and regional development and has given expression to counter-posed class forces: regional policy was historically an aspect of the welfare state as promoted by the labor movement, while urbanization policy has been much more about the forces of the political right. In the USA, by contrast, local governments and to a lesser degree, the states, have been and continue to be supreme; in contrast to Western Europe, location tends to be much more market-determined, with local and governments acting as market agents. Class forces have seemingly been much weaker, territorial coalitions occupying the center ground. As a first cut, these differences have to do with state structure: the Western European state is far more centralized, facilitating the implementation of policies that are relatively indifferent to local specificity, while in the USA the converse applies. State structures, however, are parts of broader social formations and reflect the different socio-historical conditions in which West European societies, on the one hand, and their American counterpoint, on the other, have emerged.


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