61 research outputs found
Submarine geomorphology of the Southwestern Sardinian continental shelf (Mediterranean Sea): Insights into the Last Glacial Maximum sea-level changes and related environments
During the lowstand sea-level phase of the Last Glacial Maximum (LGM), a large part of
the current Mediterranean continental shelf emerged. Erosional and depositional processes shaped
the coastal strips, while inland areas were affected by aeolian and fluvial processes. Evidence of
both the lowstand phase and the subsequent phases of eustatic sea level rise can be observed on the
continental shelf of Sardinia (Italy), including submerged palaeo-shorelines and landforms, and
indicators of relict coastal palaeo-environments. This paper shows the results of a high-resolution
survey on the continental shelf off San Pietro Island (southwestern Sardinia). Multisensor and
multiscale data—obtained by means of seismic sparker, sub-bottom profiler chirp, multibeam, side
scan sonar, diving, and uncrewed aerial vehicles—made it possible to reconstruct the morphological
features shaped during the LGM at depths between 125 and 135 m. In particular, tectonic controlled
palaeo-cliffs affected by landslides, the mouth of a deep palaeo-valley fossilized by marine
sediments and a palaeo-lagoon containing a peri-littoral thanatocenosis (18,983 ± 268 cal BP) were
detected. The Younger Dryas palaeo-shorelines were reconstructed, highlighted by a very well
preserved beachrock. The coastal paleo-landscape with lagoon-barrier systems and retro-littoral
dunes frequented by the Mesolithic populations was reconstructed
The mandibular condyle as uncommon metastatic site of neuroendocrine carcinoma: Case report and review of literature
Temporo-mandibular joint (TMJ) metastases are a very rare event and only 73 cases are reported in literature. In about 40% of cases condylar metastases represent the first clinical manifestation of a tumor of elsewhere and may then allow an early diagnosis. However, the identification of this tumoral process can be difficult as in over 50% of the cases it has a nuanced clinical presentation that is very similar to temporo-mandibular disorders. The first case of metastatic neuroendocrine carcinoma (NEC) of the temporo-mandibular joint (TMJ) mimicking a temporo-mandibular joint disorder is presented in this report. Furthermore, an extensive review of the literature has been performed in order to establish a correct diagnosticâ\u80\u93therapeutic protocol for these oncologic patients
Tidal notches in Mediterranean Sea: a comprehensive analysis
Recent works (Evelpidou et al., 2012) suggest that the modern tidal notch is disappearing worldwide due sea level rise over the last century. In order to assess this hypothesis, we measured modern tidal notches in several of sites along the Mediterranean coasts. We report observations on tidal notches cut along carbonate coasts from 73 sites from Italy, France, Croatia, Montenegro, Greece, Malta and Spain, plus additional observations carried outside the Mediterranean. At each site, we measured notch width and depth, and we described the characteristics of the biological rim at the base of the notch. We correlated these parameters with wave energy, tide gauge datasets and rock lithology.
Our results suggest that, considering \u2018the development of tidal notches the consequence of midlittoral bioerosion\u2019 (as done in Evelpidou et al., 2012) is a simplification that can lead to misleading results, such as stating that notches are disappearing. Important roles in notch formation can be also played by wave action, rate of karst dissolution, salt weathering and wetting and drying cycles. Of course notch formation can be augmented and favoured also by bioerosion which can, in particular cases, be the main process of notch formation and development.
Our dataset shows that notches are carved by an ensemble rather than by a single process, both today and in the past, and that it is difficult, if not impossible, to disentangle them and establish which one is prevailing. We therefore show that tidal notches are still forming, challenging the hypothesis that sea level rise has drowned them
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