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Complesso di falde di Antigorio
- Rank
- nappe complex
- Status
- valid
- In short
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The Antigorio Nappe Complex is a composite tectonic unit of the Western Lepontic (Toce Culmination) grouping together the Antigorio Nappe and the Mergoscia Zone. The boundary between these two units, affected by isoclinal folds, has been defined differently by the authors and is even completely unidentifiable in the Southern Steep Belt (or “root zone” north of the Tonale Fault), where the rocks of each of these units are no longer recognizable due to their migmatization.
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Falda di Antigorio
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
The Antigorio Nappe is a tectonic nappe of the Western Lepontic (Toce Culimnation) consisting mainly of Variscan granitoids. In its northwestern part, this basement is surrounded by an autochthonous Mesozoic–Paleogene sedimentary cover, which could be connected to the cover of the Verampio Nappe via an early thrust syncline. Late folding is responsible for two multi-kilometer-scale isoclinal structures: the Alpe Bosa-Wandfluhhorn fold and the Ziccher fold.
- Age
- Cisuralian (= Early Permian)
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zona della Pioda di Crana
- Name Origin
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Pioda di Crana (Italia), Valle Vigezzo
- Rank
- tectonically bounded lithostratigraphic unit
- Status
- informal term
- In short
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Denominazione della falda di Antigorio nel fianco superiore della grande struttura Wandfluhhorn-Bosa.
- Age
- Late Carboniferous (= Pennsylvanian)
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Zona di Mergoscia
- Name Origin
- Rank
- tectonic zone
- Status
- informal term
- In short
-
The Mergoscia Zone is a heterogeneous tectonic unit of the Western Lepontic (Toce Culimnation). It is composed of ortho- and paragneisses, metapelites, calcschists, metabasites and meta-ultrabasites. Both metabasites and meta-ultrabasites contain rare relics of high-pressure metamorphism (retrogressed eclogites and garnet-metaperidotites). This zone, displaying a high degree of deformation, is also interpreted as a mélange rather than as an originally stratified framework.
- Age
- Paleozoic