-
Falda della Leventina-Lucomagno
- Rank
- nappe
- Status
- valid
- In short
-
The Leventina-Lucomagno Nappe is the lowest unit of the Eastern Lepontic (Ticino Culmination). It consists of a Late Variscan magmatic edifice (“Leventina Unit”) covered by a thick stack of paragneisses and micaschists (“Lucomagno Unit”). Sparse quartzitic gneisses (“roof quartzites”) occur at the boundariy between these units and were interpreted as being Mesozoic in age by several authors and hence used to discriminate between a “Leventina Nappe” and a “Lucomagno Nappe”. However, these quartz-rich horizons above the orthogneisses form metasomatically altered zones – in places sheared – and cannot be considered as Mesozoic metasediments.
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«Unità del Lucomagno»
- Name Origin
- Rank
- nappe
- Status
- informal term
- In short
-
Upper part of the Leventina-Lucomagno Nappe (Eastern Lepontic) forming a pre-Alpine sedimentary shell above the Leventina orthogneisses (“Leventina Unit”) and further deformed during the Alpine orogeny.
- Age
- Precambrian
-
zona del (Pizzo) Molare
- Name Origin
- Rank
- tectonic zone
- Status
- informal term
- Nomenclatorial Remarks
- <p>Jeannet ----, Alb. Heim 1922</p>
- In short
-
Mesozoische Sedimentbedeckung der Lukmanier-Decke: Trias, Bündnerschiefer.
- Age
- Triassic
-
Cristallino di Prato-Cornone
- Name Origin
- Rank
- tectonically bounded lithostratigraphic unit
- Status
- informal term
- In short
-
Cristallino della falda Lucomagno: paragneiss scistoso leuco-mesocratico a grana fine, ricco di quarzo, a plagioclasio, due miche, o a biotite, e granato, con marcata tessitura planare-tabulare.
-
«Unità della Leventina»
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
Lower part of the Leventina-Lucomagno Nappe (Eastern Lepontic), made up of several orthogneisses forming a deformed Late Variscan magmatic edifice composed of several magmatic pulses. Along the northeastern flank of the Valle Leventina, the Leventina orthogneisses are covered by a thick stack of paragneisses and micaschists (“Lucomagno Unit”).
-
«Quarzite del tetto»
- Name Origin
-
Cave di Morasco (TI) risp. Dazio Grande
- Rank
- lithostratigraphic unit
- Status
- incorrect name (though informally used)
- In short
-
Sparse quartzitic gneisses occur within the Leventina-Lucomagno Nappe separating a lower "Leventina Unit" from an upper "Lucomagno Unit". These “roof quartzites” ("Dachquarzit") were interpreted as being Mesozoic in age by several authors and hence used to discriminate between a “Leventina Nappe” and a “Lucomagno Nappe”. However, these quartz-rich horizons above the Leventina orthogneisses form metasomatically altered zones – in places sheared – and cannot be considered as Mesozoic metasediments. Similar quartzitic horizons also occur where the Simano Nappe directly overlies the Leventina orthogneisses.
- Age
- Triassic
-
Gneiss della Leventina
- Name Origin
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
-
Leuko- bis mesokrater granitischer Zweiglimmergneis, meistens porphyrisch (gleichkörnige bis feinkörnige/aplitische Varietäten treten jedoch auch vor). Je nach Deformation kann die Textur geflammt, flaserig, augig oder fleckig sein. Sedimentäre Zwischenlagen (Glimmerschiefer, Hornblendegneis, Amphibolit, Quarzit, Pegmatit, Marmor, Anhydritfels).
- Age
- Early Carboniferous (= Mississipian)
-
Gneiss di Preonzo (Gneis Leventina var. V)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà alcali-aplitica del Gneiss Leventina, con struttura granoblasta grossolana e tessitura scistosa, parallela, molto spiccata (Casasopra 1939b).
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Gneiss di Biasca (Gneis Leventina var. III)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà aplito-leucogranitica del Gneiss Leventina, con struttura mista (granoblasta/porfirica) e tessitura porfiroide poco scistosa (Casasopra 1939b).
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Gneiss di Bodio (Gneis Leventina var. IIIa)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà aplito-leucogranitica del Gneiss Leventina, con struttura mista (granoblasta/porfirica) e tessitura porfiroide massiccia (Casasopra 1939b).
-
Gneiss di Lavorgo (Gneis Leventina var. IIIb)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà aplito-leucogranitica del Gneiss Leventina, con struttura mista (granoblasta/porphirica) e tessitura porfiroide lenticolare scistosa (Casasopra 1939b).
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Gneiss di Faido (Gneis Leventina var. VI+VII+VIII)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà leucogranitica engadinitica del Gneiss Leventina, con struttura granoblasta ad elementi minuti e tessitura scistosa parallela laminare (tipo VI), granulare fine (tipo VII) o occhiadina (tipo VIII) (Casasopra 1939b).
-
Gneiss di Claro (Gneis Leventina var. I+Ia)
- Name Origin
-
Cava a nord di Claro (TI) (Scubiago)
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà quarzodioritica si-oligoclasica chiara del Gneiss Leventina, con struttura granoblasta ad elementi grossolani e tessitura scistosa parallel, talora fluidale (Casasopra 1939b).
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Gneiss del Piottino (Gneis Leventina var. IX)
- Name Origin
-
Strada cantonale della Gola di Monte Piottino (TI)
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà quarzodioritica chiara del Gneiss Leventina, con tendenza si-oligoclasica, struttura granoblasta ad elementi minuti e tessitura scistosa laminare, lamellare, glandolare o pieghettata (Casasopra 1939b).
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Gneiss di Cresciano (Gneis Leventina var. II)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà quarzodioritica chiara del Gneiss Leventina, a struttura granoblasta a grossezza media e tessitura scistosa, più o meno parallela, talora fluidale (Casasopra 1939b).
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Gneiss di Lodrino (Gneis Leventina var. IV)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Varietà quarzodioritica scura del Gneiss Leventina, con struttura granoblasta a grossezza media e tessitura scistosa accentuata (Casasopra 1939b).
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Gneiss di Personico (Gneis Leventina var. IVa)
- Name Origin
- Rank
- regional facies
- Status
- local name (informal)
- In short
-
Gneiss a feldspato alcalino, a doppia mica con struttura prevalentemente porfiroide della falda Leventina-Lucomagno. Varietà quarzodioritica scura del Gneiss Leventina, con struttura granoblasta a grossezza media e tessitura scistosa accentuata (Casasopra 1939b).
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