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Geosciences
Special Issues
Rocky Coasts: Quaternary Sedimentary Successions and Modern Analogues
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Rocky Coasts: Quaternary Sedimentary Successions and Modern Analogues

A special issue of Geosciences (ISSN 2076-3263).

Deadline for manuscript submissions: closed (15 December 2022) | Viewed by 2851

Special Issue Editors

Dr. Stefano Andreucci

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Guest Editor
Department of Scienze Chimiche e Geologiche, Cittadella Universitaria, Università di Cagliari, Blocco A, 09042 Monserrato, Italy
Interests: sedimentary geology; sedimentology stratigraphy; luminescence dating
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Dr. Daniele Sechi

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Guest Editor
University of Sassari Department DADU – Dipartimento di Architettura, Design e Urbanistica, Università degli Studi di Sassari, Palazzo del Pou Salit – Piazza Duomo, 6-07041 Alghero, Italy
Interests: quaternary; luminescence dating; sea level and climate changes; sedimentary geology; sedimentology stratigraphy; neotectonics; geodynamics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Augusto Pérez-Alberti

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Guest Editor
Departamento de Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de Santiago de Compostela, 15782 Galicia, Spain
Interests: coastal geomorphology; quaternary
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Rocky coasts are peculiar depositional environments dominated by barely exposed wave-cut platforms with veneer of bouldery deposits and/or sandy to gravelly pocket beaches accumulating in coves between rocky headlands. Although rocky coasts extend along about 80% of the coasts worldwide, their erosional features and sedimentary sequences have received less attention than the well-developed sandy coast systems. This is unfortunate because the interaction between the geosphere, hydrosphere and biosphere in controlling the formation and the evolution of rocky coastal areas is not fully understood. Moreover, forecasting the response of rocky coasts to future rising sea-level and increasing storminess yields significant improvements to mitigate geological risks.

Quaternary flights of marine terraces are geological features found and studied worldwide and used to track sea-level fluctuations and accurately quantify the net vertical displacement of active tectonic coasts. Sedimentary coastal sequences covering marine terraces are usually characterized by relatively thin shallow marine deposits unconformably lying on the terrace. Sequence passes upward to thick compound dunes and/or alternation of aeolian and colluvial/alluvial systems. These aeolian systems show various dune types (barchans, climbing, clifftop, sand ramp, etc.), and the alternation with colluvial–alluvial bodies may reflect millennial-scale climate changes. This Special Issue focuses on recent advances in the study of rocky coasts with emphasis on (i) facies analysis and depositional profile of sandy, mixed and bouldery pocket beaches; (ii) coastal dune formations and evolutions; (iii) rocky shore evolution; (iiii) the discrimination of global to local and/or human-induced forcing factors on erosion/sedimentation of Quaternary rocky coastal sequences.

Contributions in all possible fields of Earth science related to rocky coastal environments are encouraged.

Dr. Stefano Andreucci
Dr. Daniele Sechi
Prof. Dr. Augusto Pérez-Alberti
Guest Editors

Manuscript Submission Information

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Keywords

  • dynamics and evolution of cliffs, shore platforms and bouldery beaches
  • mixed sandy–gravelly pocket beaches
  • marine terraces
  • beachrocks
  • coastal dunes
  • neotectonics
  • millennial-scale climate changes (Heinrich events, D–O cycles)
  • Holocene–Anthropocene

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Published Papers (1 paper)

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Research

22 pages, 5323 KiB  
Article
Coarse-Clast Storm Deposit and Solitary Boulders on the Island of Mana (NP Kornati, Central Adriatic, Croatia)
by Tvrtko Korbar, Dražen Navratil, Cléa Denamiel, Branko Kordić, Sara Biolchi, Ivica Vilibić and Stefano Furlani
Geosciences 2022, 12(10), 355; https://doi.org/10.3390/geosciences12100355 - 22 Sep 2022
Cited by 2 | Viewed by 2149
Abstract
There is growing evidence that many large coastal boulder deposits found on the exposed rocky ocean shores were deposited by extreme storm waves rather than by catastrophic tsunamis, as previously thought. In addition, before the first discovery in the northern Adriatic a few [...] Read more.
There is growing evidence that many large coastal boulder deposits found on the exposed rocky ocean shores were deposited by extreme storm waves rather than by catastrophic tsunamis, as previously thought. In addition, before the first discovery in the northern Adriatic a few years ago, such deposits were not expected in relatively shallow semi-enclosed inland basins. Here we report on a large coastal coarse-clast deposit on the central Adriatic island of Mana, which also contains numerous large storm boulders that weigh up to several tons. Large solitary boulders are also located outside of the deposit, closer to the partly submerged sea cliff and the wave impact. The erosion of the cliff top and displacement of the carbonate bedrock fragments began when the extreme waves inundated the lowermost part of the cliff edge, probably during the late Holocene sea-level rise. The UAS photogrammetry-based fragmentation analysis of the storm deposit and the calculated fractal dimension value indicate that the material was fragmented by multiple high-energy events. A comparison of the available photographs indicates that displacements of the most exposed solitary boulders probably occurred during Vaia, the last extreme storm that hit the Adriatic on the 29th of October 2018. However, the modeled maximum wave height south of Mana during the peak of the storm would be insufficient to move these boulders. Yet local geomorphology probably further influenced the increase in wave height that, in combination with specific geological features, caused displacements of the boulders. There is a shorter fetch affecting Mana Island with respect to the northern Adriatic boulder field in southern Istria. Thus, such an active local erosion of the generally stable eastern Adriatic karstic coast depends on the extreme storms that have a weaker impact in the central than in the northern Adriatic. Full article
(This article belongs to the Special Issue Rocky Coasts: Quaternary Sedimentary Successions and Modern Analogues)
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