EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA)
Tuffaceous layers of Middle-Triassic age, weakly metamorphosed, are interbedded within a carbonatic succession outcropping near Cogoleto (Voltri Group, Pennidic Zone of the Alps). Volcanic glass, K-feldspar, plagioclase and biotite subordinate, constitute the primary mineralogical composition. From...
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| Format: | Article |
| Language: | English |
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Milano University Press
2023-05-01
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| Series: | Rivista Italiana di Paleontologia e Stratigrafia |
| Subjects: | |
| Online Access: | https://riviste.unimi.it/index.php/RIPS/article/view/20161 |
| _version_ | 1797700798086381568 |
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| author | LUCIANO CORTESOGNO PIETRO MARIO ROSSI RICCARDO VANNUCCI |
| author_facet | LUCIANO CORTESOGNO PIETRO MARIO ROSSI RICCARDO VANNUCCI |
| author_sort | LUCIANO CORTESOGNO |
| collection | DOAJ |
| description |
Tuffaceous layers of Middle-Triassic age, weakly metamorphosed, are interbedded within a carbonatic succession outcropping near Cogoleto (Voltri Group, Pennidic Zone of the Alps). Volcanic glass, K-feldspar, plagioclase and biotite subordinate, constitute the primary mineralogical composition. From a palaeogeographic point of view the studied sequences belong to the Pre-piemontese or to the Outer Piemontese Zone, that is placed near the border of the lnner Piemontese Zone,that in Jurassic time opened in an oceanic basin. The microfacies and the chemistry of the carbonatic part of the sequence suggest that the lower part belongs to a shelf environment, while the upper part to a deeper environment.
In spite of the difficults of interpretation that metamorphic pyroclastic rocks present we arranged them in a ryolitic-ryodacitic rock-type and in a calc-alkaline chemical trend. Nevertheless we suggest that the pyroclastic layers fit in the early rifting af the Ligure-Piemontese oceanic context.
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| first_indexed | 2024-03-12T04:27:47Z |
| format | Article |
| id | doaj.art-51365a536c284fa0b1d4c4cfc310853d |
| institution | Directory Open Access Journal |
| issn | 0035-6883 2039-4942 |
| language | English |
| last_indexed | 2024-03-12T04:27:47Z |
| publishDate | 2023-05-01 |
| publisher | Milano University Press |
| record_format | Article |
| series | Rivista Italiana di Paleontologia e Stratigrafia |
| spelling | doaj.art-51365a536c284fa0b1d4c4cfc310853d2023-09-03T10:15:27ZengMilano University PressRivista Italiana di Paleontologia e Stratigrafia0035-68832039-49422023-05-01881EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) LUCIANO CORTESOGNOPIETRO MARIO ROSSIRICCARDO VANNUCCI Tuffaceous layers of Middle-Triassic age, weakly metamorphosed, are interbedded within a carbonatic succession outcropping near Cogoleto (Voltri Group, Pennidic Zone of the Alps). Volcanic glass, K-feldspar, plagioclase and biotite subordinate, constitute the primary mineralogical composition. From a palaeogeographic point of view the studied sequences belong to the Pre-piemontese or to the Outer Piemontese Zone, that is placed near the border of the lnner Piemontese Zone,that in Jurassic time opened in an oceanic basin. The microfacies and the chemistry of the carbonatic part of the sequence suggest that the lower part belongs to a shelf environment, while the upper part to a deeper environment. In spite of the difficults of interpretation that metamorphic pyroclastic rocks present we arranged them in a ryolitic-ryodacitic rock-type and in a calc-alkaline chemical trend. Nevertheless we suggest that the pyroclastic layers fit in the early rifting af the Ligure-Piemontese oceanic context. https://riviste.unimi.it/index.php/RIPS/article/view/20161Volcanism; Pyroclastics; Middle-Triassic; Veltri Group; ltaly. |
| spellingShingle | LUCIANO CORTESOGNO PIETRO MARIO ROSSI RICCARDO VANNUCCI EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) Rivista Italiana di Paleontologia e Stratigrafia Volcanism; Pyroclastics; Middle-Triassic; Veltri Group; ltaly. |
| title | EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) |
| title_full | EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) |
| title_fullStr | EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) |
| title_full_unstemmed | EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) |
| title_short | EPISODI VULCANICI IN SUCCESSIONI CARBONATICHE MEDIO-TRIASSICHE PREPIEMONTESI (COGOLETO, LIGURIA) |
| title_sort | episodi vulcanici in successioni carbonatiche medio triassiche prepiemontesi cogoleto liguria |
| topic | Volcanism; Pyroclastics; Middle-Triassic; Veltri Group; ltaly. |
| url | https://riviste.unimi.it/index.php/RIPS/article/view/20161 |
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