Riolite (Lugano)
Back to South AlpineRepresentation and status
- Color CMYK
- 20 / 80 / 70 / 0
- Color RGB
- R: 200 G: 100 B: 75
- Rank
- petrographic facies
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Rhyolith (Lugano)
- Français
- Rhyolite (Lugano)
- Italiano
- Riolite (Lugano)
- English
- Rhyolite (Lugano)
- Origin of the Name
-
«porfido» = riolite
- Historical Variants
-
fluidale Quarzporphyrserie (Doeglas 1930), Quartzoporphyres supérieurs = Quartzoporphyre et son tuf (de Sitter 1939), Tufi di porfidi quarziferi, p.p. rinsaldati (ignimbriti) (Bernoulli et al. 1976), Permian rhyolites of the Lugano area (Trümpy et al. 1980), Rhyolithe (Buletti 1985), Riolite = rioliti del Monte Grumello = ignimbrite del Monte Grumello = ignimbrite di Riva San Vitale (Bernoulli et al. 2018)
Description
- Thickness
- Mehr als 350 m im Val Battuta ; keilt südlich Porto Ceresio aus (Doeglas 1930).
Hierarchy and sequence
- Superordinate unit
- Subordinate units
- Units at roof
- Units at floor
Age
- Age at top
-
- Cisuralian (= Early Permian)
- Age at base
-
- Cisuralian (= Early Permian)
- Dating Method
-
262 +/-1 Ma
Geography
- Geographical extent
- Riva-San Vitale, Monte San Giorgio, Brusino-Arsizio, Melano.
Palaenography and tectonic
-
- Permo-Carboniferous
- Tectonic unit (resp. main category)
- Kind of protolith
-
- volcanic
References
- Definition
-
(1930) :
Die Geologie des Monte San Giorgio und des Val Mara. Leidsche Geologische Mededeelingen III, 335-396
S.347: Die fluidale Quarzporphyrserie