Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy

Abstract Through a geomorphological study relying on statistically assessed classes of hilltop elevations, we reconstruct a suite of paleo-surfaces along the Tiber River Valley north of Rome that we identify as fluvial terraces formed by interplay between global sea-level fluctuations and regional u...

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Autores principales:	Fabrizio Marra, Fabio Florindo, Carmelo Petronio
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1f33b17768ec4343bd089672c940fdd3
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spelling	oai:doaj.org-article:1f33b17768ec4343bd089672c940fdd32021-12-02T11:40:21ZQuaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy10.1038/s41598-017-02437-12045-2322https://doaj.org/article/1f33b17768ec4343bd089672c940fdd32017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02437-1https://doaj.org/toc/2045-2322Abstract Through a geomorphological study relying on statistically assessed classes of hilltop elevations, we reconstruct a suite of paleo-surfaces along the Tiber River Valley north of Rome that we identify as fluvial terraces formed by interplay between global sea-level fluctuations and regional upift. Using biostratigraphic constraints provided by marine through continental deposits of Santernian age, we recognize the oldest terrace in this area, corresponding to an early coastal plain of late Santernian-Emilian age. By assuming the simple chronological principle of a staircase geometry we correlate the sea-level highstands of MIS 21 through MIS 5 with the lowest eight paleo-surfaces. By plotting against time the cumulated terrace elevations and the average elevation of the Santernian coastline in the investigated area, we detect rates of uplift during the last 1.8 Ma. Two major pulses of uplift are recognized 0.86 through 0.5 Ma, and 0.25 Ma through the Present, which are interpreted as driven by the subduction process and uprising of metasomatized magma bodies on the Tyrrhenian Sea Margin of central Italy, superimposied on a smaller isostatic component of uplift.Fabrizio MarraFabio FlorindoCarmelo PetronioNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fabrizio Marra Fabio Florindo Carmelo Petronio Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
description	Abstract Through a geomorphological study relying on statistically assessed classes of hilltop elevations, we reconstruct a suite of paleo-surfaces along the Tiber River Valley north of Rome that we identify as fluvial terraces formed by interplay between global sea-level fluctuations and regional upift. Using biostratigraphic constraints provided by marine through continental deposits of Santernian age, we recognize the oldest terrace in this area, corresponding to an early coastal plain of late Santernian-Emilian age. By assuming the simple chronological principle of a staircase geometry we correlate the sea-level highstands of MIS 21 through MIS 5 with the lowest eight paleo-surfaces. By plotting against time the cumulated terrace elevations and the average elevation of the Santernian coastline in the investigated area, we detect rates of uplift during the last 1.8 Ma. Two major pulses of uplift are recognized 0.86 through 0.5 Ma, and 0.25 Ma through the Present, which are interpreted as driven by the subduction process and uprising of metasomatized magma bodies on the Tyrrhenian Sea Margin of central Italy, superimposied on a smaller isostatic component of uplift.
format	article
author	Fabrizio Marra Fabio Florindo Carmelo Petronio
author_facet	Fabrizio Marra Fabio Florindo Carmelo Petronio
author_sort	Fabrizio Marra
title	Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
title_short	Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
title_full	Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
title_fullStr	Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
title_full_unstemmed	Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy
title_sort	quaternary fluvial terraces of the tiber valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central italy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1f33b17768ec4343bd089672c940fdd3
work_keys_str_mv	AT fabriziomarra quaternaryfluvialterracesofthetibervalleygeochronologicandgeometricconstraintsonthebackarcmagmatismrelatedupliftincentralitaly AT fabioflorindo quaternaryfluvialterracesofthetibervalleygeochronologicandgeometricconstraintsonthebackarcmagmatismrelatedupliftincentralitaly AT carmelopetronio quaternaryfluvialterracesofthetibervalleygeochronologicandgeometricconstraintsonthebackarcmagmatismrelatedupliftincentralitaly
_version_	1718395627548704768

Quaternary fluvial terraces of the Tiber Valley: geochronologic and geometric constraints on the back-arc magmatism-related uplift in central Italy

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