Shore grykes along the western Istrian coast

Abstract

Cucchi: Obalni grajki ob zahodni Istrski obali V članku prestavimo nove topografske in morfološke izsledke ter fizikalno-kemične parametre izmerjene na izbrani� obal-ni� grajki� severoza�odne obale Istre med Savudrijo in Zambratijo. Raziskave smo omejili na šest profilov s štirimi do petimi plimskimi bazeni. V vse� profili� smo določili tri tipične morfološke cone, kateri� značilnosti so tesno povezane z lokalnim plimovanjem. Višji bazeni so izpostavljeni zakrasevanju, zato so v nji� oblike bolj gladke, v nji�ovem dnu pa prevladujejo sedimenti s kopnega, predvsem terra rossa. V smeri morja opazimo vse večji vpliv biokorozije. Ob vznožju grajkov najdemo peske in prodnike. Kemični parametri kažejo, da so nižje ležeči grajki izpostavljeni predvsem delovanju morske vode, medtem ko višje ležeče oblikuje predvsem deževnica. Razvoj obalni� grajkov je povezan z nezveznostmi, ki so posledica lokalni� tektonski� deformacij. Ključne besede: obalni kras, za�odna Istra, obalni grajki, plimski bazeni, apnenec.

Integrated Geomechanical and Digital Photogrammetric Survey in the Study of Slope Instability Processes of a Flysch Sea Cliff (Debeli Rtič Promontory, Slovenia)

“…On the whole, all data presented herein demonstrates that the Debeli Rtič sea cliff is affected by inherent and cumulative, progressive retreat, as evidenced by historical maps (Figure 7) and, more distinctly, by several images that were repeatedly taken over the last 20 years (Figures 14 and 15). Moreover, as also reported by [7,8], sea cliff retreat mainly consists of a dynamic process characterized by local episodic falls, topples and slides (Figure 16). This study helps in defining the instability processes that affect the sea cliff at Debeli Rtič and the role played by marine erosion and mass-wasting processes in the progressive landward retreat of the cliff.…”

“…In the eastern part of the Gulf of Trieste (GOT), sea cliffs made up of terrigenous sequences with shore platforms at the slope toe constitute the dominant morphotype [6]. In this area, sea cliff retreat generates wide shore platforms without a marked seaward drop, due to sea level change and the local tectonic setting [7]. The sea cliff Land 2022, 11, 2255 2 of 27 retreat of the Slovenian coast is the result of both marine and subaerial processes.…”

Factors Triggering Sea Cliff Instability Along the Slovenian Coasts

“…Few similar works concern even Slovenian coasts (Furlani, 2003, Furlani, 2007. The author provided a background of the problem and some retreat values.…”

Morphoneotectonics and lithology of the eastern sector of the Gulf of Trieste (NE Italy)

“…They extend for some tens of metres offshore. Due to the late Holocene sea-level change, shore platforms also occur below sea level (Furlani, 2003;Furlani et al, 2011). The coastal sectors classified as scree are characterised by the presence of limestone or cemented scree deposit blocks overlapping flysch, such as (from N to S) at Costa dei Barbari (Figure 3(d)), Marina Aurisina, Canovella de' Zoppoli and Filtri.…”

“…The southeastern coasts of the gulf, from Grignano to Muggia, have been classified as built-up, because they are completely modified by human activities (Figure 4(a)). Furlani (2003) suggested that this tract was originally composed of cliffs and shore platforms.…”