Tectonostratigraphic units in the Variscan belt of central Europe

Franke, Wolfgang

doi:10.1130/spe230-p67

Cited by 298 publications

(191 citation statements)

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“…The Březina shales are underlain by pre-orogenic carbonate successions (Moravian Karst Platform) deposited during the extensional phase of the basin's evolution (e.g. Hladil 1983;Franke 1989). The change from the extensional to compressional phase of basin evolution took place during the deposition of the Březina Formation and coeval facies of the Líšeň Formation, namely during the lower and middle Visean.…”

Section: Geological Settingsmentioning

confidence: 99%

Revison of an Atheloptic Visean Trilobite Association in the Moravian Karst (Czech Republic)

Rak¹,

Viktorýn²,

Otava³

2015

Geologica Carpathica

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Abstract:Recently two new trilobite occurrences were discovered during geological mapping of fossiliferous shales of the Březina Formation around the village of Březina in the Moravian Karst (Czech Republic). The newly discovered localities are extraordinary because of the unexpected occurrence of articulated trilobite exoskeletons associated with brachiopods including supporting spines. The new atheloptic association of Mississippian trilobites is described for the first time from the Moravian Karst.

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Section: Geological Settingsmentioning

confidence: 99%

Revison of an Atheloptic Visean Trilobite Association in the Moravian Karst (Czech Republic)

Rak¹,

Viktorýn²,

Otava³

2015

Geologica Carpathica

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“…The thrust sheets are underlain by a relatively thick décollement layer, a tectonic mélange containing slices of MOR-type basalts and neritic clastics and carbonates of Ordovician -Early Carboniferous age [159]. A 300 km long slab of continental crust underlies the Rheno-Hercynic zone.…”

Section: Variscidesmentioning

confidence: 99%

“…Microcontinents, or ribbon continents, formed in the intraoceanic area between these two basins [158]. In the traverse of the central European Variscan chain considered here, they include the Saxothuringian, Barrandian and Moldanubian zones [159].…”

Section: Variscidesmentioning

confidence: 99%

Thick-Skinned and Thin-Skinned Tectonics: A Global Perspective

Pfiffner¹

2017

Preprint

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This paper gives an overview of the large-scale tectonic styles encountered in orogens worldwide. Thin-skinned and thick-skinned tectonics represents two end member styles recognized in mountain ranges. A thick-skinned tectonic style is typical for margins of continental plates. Thick-skinned style including the entire crust and possibly the lithospheric mantle are associated with intracontinental contraction. Delamination of subducting continental crust and horizontal protrusion of upper plate crust into the opening gap occurs in the terminal stage of continent-continent collision. Continental crust thinned prior to contraction is likely to develop relatively thin thrust sheets of crystalline basement. A true thin-skinned type requires a detachment layer of sufficient thickness. Thickness of the décollement layer as well as the mechanical contrast between décollement layer and detached cover control the style of folding and thrusting within the detached cover units. In subduction related orogens, thin-and thick-skinned deformation may occur several hundreds of kilometers from the plate contact zone. Basin inversion resulting from horizontal contraction may lead to the formation of basement uplifts by the combined reactivation of pre-existing normal faults and initiation of new reverse faults. In composite orogens thick-skinned and thin-skinned structures evolve with a pattern where nappe stacking propagates outward and downward.

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“…2) and had a comparable evolution until the break-off of Avalonia. This holds also for the Alpine realms (External domain, Penninic domain, and parts of the AustroAlpine domain), sharing this geological evolution since the Proterozoic in the prolongation of Avalonia, whereas the Southern Franke (1989), Martínez-Catalán (1990), and Ribeiro and Sanderson (1996); nomenclature of the main Variscan units after Kossmat (1927). AA, AustroAlpine (light grey; subdivisions, see Neubauer and Frisch, 1993); Am, Armorican Massif; Aq, Aquitaine; BCSZ, Badajoz -Cordoba Shear Zone; BM, Bohemian Massif; BV, Brunovistulicum; cI, Central Iberian Zone; CO, Cabo Ortegal Complex; CZ, Cantabrian Zone; Co, Corsica; HE, Helvetic Zone (diagonal pattern); iA, Intra-Alpine (diagonal pattern); Ib, Iberia, allochtonous; Lz, Lizard; MC, French Central Massif; MS, Moravo-Silesian; Or, Ordenes ophiolites; OM, Ossa Morena Zone; PE/BR, Penninic/Brianc ßonnais (dark grey); sA, Southalpine; Sd, Sardinia; sP, South Portuguese Zone; WALZ, West Asturias Leon Zone.…”

Section: Peri-gondwanan Evolutionmentioning

confidence: 99%

Gondwana-derived microcontinents — the constituents of the Variscan and Alpine collisional orogens

2003

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The European Variscan and Alpine mountain chains are collisional orogens, and are built up of pre-Variscan ''building blocks'' which, in most cases, originated at the Gondwana margin. Such pre-Variscan elements were part of a preOrdovician archipelago-like continental ribbon in the former eastern prolongation of Avalonia, and their present-day distribution resulted from juxtaposition through Variscan and/or Alpine tectonic evolution. The well-known nomenclatures applied to these mountain chains are the mirror of Variscan resp. Alpine organization. It is the aim of this paper to present a terminology taking into account their pre-Variscan evolution at the Gondwana margin. They may contain relics of volcanic islands with pieces of Cadomian crust, relics of volcanic arc settings, and accretionary wedges, which were separated from Gondwana by initial stages of Rheic ocean opening. After a short-lived Ordovician orogenic event and amalgamation of these elements at the Gondwanan margin, the still continuing Gondwana-directed subduction triggered the formation of Ordovician Al-rich granitoids and the latest Ordovician opening of Palaeo-Tethys. An example from the Alps (External Massifs) illustrates the gradual reworking of Gondwana-derived, pre-Variscan elements during the Variscan and Alpine/ Tertiary orogenic cycles.

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Tectonostratigraphic units in the Variscan belt of central Europe

Cited by 298 publications

References 0 publications

Revison of an Atheloptic Visean Trilobite Association in the Moravian Karst (Czech Republic)

Revison of an Atheloptic Visean Trilobite Association in the Moravian Karst (Czech Republic)

Thick-Skinned and Thin-Skinned Tectonics: A Global Perspective

Gondwana-derived microcontinents — the constituents of the Variscan and Alpine collisional orogens

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