Mapping and luminescence aging of raised marine terraces and aeolian ridges along an ~90 km coastal stretch in southwestern Sicily provide the first quantitative assessment of vertical tectonic deformation in this region, which spans the frontal part of an active thrust belt. We recognized a staircase of eleven terraces and nine related aeolian ridges. The elevation profile of terraces parallel to the coast shows a >90 km long bell-shaped pattern, onto which shorter-wavelength (~10 km long) undulations are superimposed. Luminescence ages from terraced beach deposits and aeolian sediments constrain the position of paleoshorelines formed during MIS 5e, 7a and 7c, with a maximum uplift rate of ~0.75 mm/a, and indicate a late Middle-Late Pleistocene (80e400 ka) age for the sequence of terraces. The elevation of Lower Pleistocene morpho-depositional markers points that uplift may have occurred at similar rates at the beginning of the Early Pleistocene, but almost zeroed between ~1.5 and 0.4 Ma before the recent renewal. The uneven elevation of Middle-Upper Pleistocene paleoshorelines observed moving along the coast documents that uplift embeds both a regional and a local component. The regional, symmetric bellshaped uplift is related to involvement in the thrust belt of thicker crustal portions of the northern African continental margin. The short-wavelength undulations represent the local component and correspond to actively growing bedrock folds. The present study contributes to unravel the different spatial and temporal scales of deformation processes at a collisional margin.

Ferranti, L., Burrato, P., Sechi, D., Andreucci, S., Pepe, F., & Pascucci, V. (2021). Late Quaternary coastal uplift of southwestern Sicily, central Mediterranean sea. QUATERNARY SCIENCE REVIEWS, 255 [10.1016/j.quascirev.2021.106812].

Late Quaternary coastal uplift of southwestern Sicily, central Mediterranean sea

Pepe, Fabrizio
Conceptualization
;
2021

Abstract

Mapping and luminescence aging of raised marine terraces and aeolian ridges along an ~90 km coastal stretch in southwestern Sicily provide the first quantitative assessment of vertical tectonic deformation in this region, which spans the frontal part of an active thrust belt. We recognized a staircase of eleven terraces and nine related aeolian ridges. The elevation profile of terraces parallel to the coast shows a >90 km long bell-shaped pattern, onto which shorter-wavelength (~10 km long) undulations are superimposed. Luminescence ages from terraced beach deposits and aeolian sediments constrain the position of paleoshorelines formed during MIS 5e, 7a and 7c, with a maximum uplift rate of ~0.75 mm/a, and indicate a late Middle-Late Pleistocene (80e400 ka) age for the sequence of terraces. The elevation of Lower Pleistocene morpho-depositional markers points that uplift may have occurred at similar rates at the beginning of the Early Pleistocene, but almost zeroed between ~1.5 and 0.4 Ma before the recent renewal. The uneven elevation of Middle-Upper Pleistocene paleoshorelines observed moving along the coast documents that uplift embeds both a regional and a local component. The regional, symmetric bellshaped uplift is related to involvement in the thrust belt of thicker crustal portions of the northern African continental margin. The short-wavelength undulations represent the local component and correspond to actively growing bedrock folds. The present study contributes to unravel the different spatial and temporal scales of deformation processes at a collisional margin.
Settore GEO/03 - Geologia Strutturale
Ferranti, L., Burrato, P., Sechi, D., Andreucci, S., Pepe, F., & Pascucci, V. (2021). Late Quaternary coastal uplift of southwestern Sicily, central Mediterranean sea. QUATERNARY SCIENCE REVIEWS, 255 [10.1016/j.quascirev.2021.106812].
File in questo prodotto:
File Dimensione Formato  
Ferranti et al., 2021_compressed.pdf

Solo gestori archvio

Tipologia: Versione Editoriale
Dimensione 1.77 MB
Formato Adobe PDF
1.77 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/480548
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact