Journal ArticleDOI
The morphology of insular shelves as a key for understanding the geological evolution of volcanic islands: Insights from Terceira Island (Azores)
Rui Quartau,Rui Quartau,Ana Hipólito,Claudia Romagnoli,Daniele Casalbore,José Madeira,Fernando Tempera,Cristina Roque,Cristina Roque,Francesco Latino Chiocci +9 more
Reads0
Chats0
TLDR
In this paper, the authors used bathymetry and high-resolution seismic reflection profiles to characterize the morphology of the insular shelves adjacent to each volcanic edifice of Terceira Island in order to improve the understanding of its evolution.Abstract:
Shelves from volcanic ocean islands result from the competition between two main processes, wave erosion that forms and enlarges them and volcanic progradation that reduces their dimension. In places where erosion dominates over volcanism, shelf width can be used as a proxy for the relative age of the subaerial volcanic edifices and reconstruction of their extents prior to erosion can be achieved. In this study, new multibeam bathymetry and high-resolution seismic reflection profiles are exploited to characterize the morphology of the insular shelves adjacent to each volcanic edifice of Terceira Island in order to improve the understanding of its evolution. Subaerial morphological and geological/stratigraphic data were also used to establish the connection between the onshore and offshore evolution. Shelf width contiguous to each main volcanic edifice is consistent with the known subaerial geological history of the island; most of the older edifices have wider shelves than younger ones. The shelf edge proved to be a very useful indicator in revealing the original extent of each volcanic edifice in plan view. Its depth was also used to reconstruct vertical movements, showing that older edifices like Serra do Cume-Ribeirinha, Guilherme Moniz, and Pico Alto have subsided while more recent ones have not. The morphology of the shelf (namely the absence/presence of fresh lava flow morphologies and several types of erosional, depositional, and tectonic features) integrated with the analysis of the coastline morphology allowed us to better constrain previous geological interpretations of the island evolution.read more
Citations
More filters
Journal ArticleDOI
Terraced landforms onshore and offshore the cilento promontory (south-eastern tyrrhenian margin) and their significance as quaternary records of sea level changes
Alessandra Savini,Valentina Alice Bracchi,Antonella Cammarosano,Micla Pennetta,Filippo Russo +4 more
TL;DR: In this paper, the authors integrated different marine and terrestrial datasets to bring together and re-examine numerous terraced landforms that typify the Cilento Promontory and its offshore region.
Journal ArticleDOI
Late Quaternary paleo sea level geomorphological markers of opposite vertical movements at Salina volcanic island (Aeolian Arc)
Book ChapterDOI
New Insights on Failure and Post-failure Dynamics of Submarine Landslides on the Intra-slope Palmarola Ridge (Central Tyrrhenian Sea)
Daniele Casalbore,Alessandro Bosman,Francesco Latino Chiocci,Michela Ingrassia,Leonardo Macelloni,Andrea Sposato,Eleonora Martorelli +6 more
TL;DR: In this article, multibeam and seismic data on the intra-slope Palmarola ridge show widespread pockmarks and landslide-related morphologies along its flanks.
Journal ArticleDOI
Integration of Remote Sensing and Offshore Geophysical Data for Monitoring the Short-Term Morphological Evolution of an Active Volcanic Flank: A Case Study from Stromboli Island
Daniele Casalbore,Federico Di Traglia,Claudia Romagnoli,Massimiliano Favalli,Teresa Gracchi,Carlo Tacconi Stefanelli,Teresa Nolesini,Guglielmo Rossi,Matteo Del Soldato,Irene Manzella,Paul D. Cole,Nicola Casagli,Francesco Latino Chiocci +12 more
TL;DR: In this article , the authors demonstrate the importance of an integrated analysis of multi-temporal remote sensing (photogrammetry, COSMO-SkyMed Synthetic Aperture Radar amplitude image) and marine geophysical data (multibeam and side scan sonar data) to characterize the main morphological, textural, and volumetric changes that occurred along the Sciara del Fuoco (SdF) slope in the 2020-2021 period.
Book ChapterDOI
Relative Sea Level Rise, Palaeotopography and Transgression Velocity on the Continental Shelf
Francesco Latino Chiocci,Daniele Casalbore,Francesca Marra,Fabrizio Antonioli,Claudia Romagnoli +4 more
TL;DR: In this paper, a simple conceptual and computational approach is presented to reconstructing the transgression velocity on shelf areas, making use of Digital Terrain Models (DTMs) of seafloor topography coupled with relative sea level curves, and discuss the different outcomes and limitations at different spatial scales.
References
More filters
Journal ArticleDOI
Modelled atmospheric temperatures and global sea levels over the past million years
TL;DR: A coupled model of the Northern Hemisphere ice sheets and ocean temperatures, forced to match an oxygen isotope record for the past million years compiled from 57 globally distributed sediment cores, finds that during extreme glacial stages, air temperatures were 17.8 °C lower than present, with a 120 ± 10 m sea level equivalent of continental ice present.
Journal ArticleDOI
Giant Hawaiian Landslides
Journal ArticleDOI
Azores mantle blob: Rare-earth evidence
TL;DR: In this paper, rare earths (RE) in basalts erupted within the rift of the Mid-Atlantic Ridge show a progressive change from light-RE enriched to depleted patterns from the Azores Platform (40°N) down to 33°30′N.
Journal ArticleDOI
Large landslides from oceanic volcanoes
Robin T. Holcomb,Roger Searle +1 more
TL;DR: This paper showed that steep flanks formerly attributed to tilting or marine erosion have been reinterpreted as landslide headwalls mantled by younger lava flows, and suggested that seacliffs previously attributed to marine erosion of many additional islands may instead be headwall of still other landslides.
Journal ArticleDOI
Modeling the development of wave-cut shore platforms
TL;DR: In this article, a mathematical model was used to investigate the development of wave-cut shore platforms with constant sea level, considering the effects of deep water wave height spectra, period and wavelength, breaker height and depth, breaker type, the width and bottom roughness of the surf zone, the gradient of the submarine slope, an erosional threshold related to the strength of the rocks, the number of hours each year in which the water level is at each intertidal elevation and the amount and persistence of the debris at the cliff foot.