Geomorphology of Naples and the Campi Flegrei: human and natural landscapes in a restless land

Naples and its surroundings are a very young landscape, originated from 40 ka in response to strong and explosive volcanic processes, which created the Campi Flegrei, one of the largest volcanic fields of the world. Despite the repeated and continuous volcanic activity, this territory was selected for human settlements since Neolithic times and hosted some of the most important Greek and Roman towns in the Mediterranean area (e.g., Cuma, Parthenope, Neapolis, Baia and Puteoli). Geoarcheological data and historical chronicles testify to human coexistence with eruptions, bradyseismic ground motions, coastline changes, floods and landslides. With the aim of describing the geomorphological evolution of this area to a wide audience, including also non-experts, we constructed a synthetic geomorphological map of the area and sketches that synthesise the main stages of the geomorphological evolution of the historical centre of Naples and the coastal belt of the Gulf of Pozzuoli during the last millennia

Late Holocene landscape evolution of the Gulf of Naples (Italy) inferred from geoarchaeological data

The mapping of landforms in the Gulf of Naples is fundamental to understanding the recent evolution of this perithyrrenian basin controlled by several systems of Quaternary faults and characterised by the presence of the Campi Flegrei and Somma Vesuvius volcanoes. In this paper a 1:85,000 map of the recent evolution of the Gulf of Naples coasts is presented. This cartographic product has been obtained using a compilation of previously published geoarchaeological coastal studies integrated with new field data. The morphogenetic map suggests a differential evolution of various coastal stretches over the past 2000 years driven not only by measured vertical ground movements and eustatic sea-level rise (of 1 m) but also by eruptions of Mt. Vesuvius, in particular the Plinian eruption of 79 AD and the subsequent reworking of it’s products, as well as by the erosive action of the sea

Landslide susceptibility zonation at the regional scale: The Molise case study (Italy)

Molise is an Italian region with a high concentration of landslides. However, an estimation of landslide susceptibility for the entire region has never been officially performed. In this paper, a landslide susceptibility analysis is illustrated based on the implementation of two different statistical methods (bivariate and multivariate). The aim is to obtain a susceptibility map that provides a good representation of the criticality of the study area together with a reliable statistical performance. Various combinations of conditioning factors were tested with the two methods and, based on expert judgment and ROC (Receiver Operating Curve) values, the one obtained through the multivariate approach was selected as the best map

Long-term landscape evolution of the Molise sector of the central-southern Apennines, Italy

AbstractThis paper concerns the reconstruction of the main stages of the long-term landscape evolution of the Molise portion of the central-southern Apennines along a transect divided into three sectors (SW, Central and NE). Analysis mainly focused on geomorphological, stratigraphical and structural data supported by chronological constraints, coming from an overall review of past literature and several studies carried out by the authors of the paper during the last 20 years. The results obtained allowed the elaboration of a conceptual model of the long-term evolution of the Molise sector of the central-southern Apennines. Starting from the Pliocene, the emersion of the Molise area occurred gradually from SW to NE, allowing a polycyclic landscape to evolve under the major controls first of compression then transtensional to extensional tectonics as well as climatic variations. Principal markers of the Quaternary geomorphological evolution of the Molise area are represented by the infill successions of the intermontane tectonic depressions located in its internal, SW sector and by four orders of palaeosurfaces that developed between the Early Pleistocene and the beginning of the Late Pleistocene across the region. These markers testify to the alternation of phases of substantial tectonic stability and uplift whose spatial-temporal distribution could be assessed along the investigated transect. Results highlight that the most important stages of landscape evolution occurred during the Early and Middle Pleistocene. At the beginning of the Late Pleistocene, the Molise sector of the Apennine chain had already reached its present setting and further landscape evolution occurred under the major control of climate and land-use.</jats:p

Long-term landscape evolution of the Molise sector of the central-southern Apennines, Italy

This paper concerns the reconstruction of the main stages of the long-term landscape evolution of the Molise portion of the central-southern Apennines along a transect divided into three sectors (SW, Central and NE). Analysis mainly focused on geomorphological, stratigraphical and structural data supported by chronological constraints, coming from an overall review of past literature and several studies carried out by the authors of the paper during the last 20 years. The results obtained allowed the elaboration of a conceptual model of the long-term evolution of the Molise sector of the central-southern Apennines. Starting from the Pliocene, the emersion of the Molise area occurred gradually from SW to NE, allowing a polycyclic landscape to evolve under the major controls first of compression then transtensional to extensional tectonics as well as climatic variations. Principal markers of the Quaternary geomorphological evolution of the Molise area are represented by the infill successions of the intermontane tectonic depressions located in its internal, SW sector and by four orders of palaeosurfaces that developed between the Early Pleistocene and the beginning of the Late Pleistocene across the region. These markers testify to the alternation of phases of substantial tectonic stability and uplift whose spatial-temporal distribution could be assessed along the investigated transect. Results highlight that the most important stages of landscape evolution occurred during the Early and Middle Pleistocene. At the beginning of the Late Pleistocene, the Molise sector of the Apennine chain had already reached its present setting and further landscape evolution occurred under the major control of climate and land-use

A Detailed Reconstruction of the Roman Landscape and the Submerged Archaeological Structure at “Castel dell’Ovo islet” (Naples, Southern Italy)

In this paper, we present the results of a multidisciplinary study aimed to reconstruct the Roman coastal landscape between Pizzofalcone hill and Megaris islet&#8212;the area of the ancient Parthenope, the first settlement along the Naples coast. This coastal sector was surveyed by a team of specialized divers (archaeologists and geomorphologists) and by using an Unmanned Surface Vessel (USV) equipped with acoustic and optical sensors. The indirect surveys provided a high-resolution dataset of morpho-acoustic and optical measurements, useful to obtain the geological, geomorphological and archaeological interpretations necessary to formulate hypotheses on the functionality of the complex submerged archaeological structure detected in the study area. In particular, the integration between the surveyed data, the high-resolution seafloor mapping and the previous knowledge deriving from the 1980s underwater research carried out by Centro Studi Subacquei, led us to interpret the submerged remains as a vivarium related to a 1st century BC Roman villa. Finally, by measuring the submersion of several channels and a well-preserved crepido, a relative sea level during the period of use at &#8722;2.2 m &#177; 0.2 m mean sea level (MSL) was deduced, in agreement with the previous geoarchaeological studies realized in the near coastal sectors

Late Holocene landscape evolution of the Gulf of Naples (Italy) inferred from geoarchaeological data

<p>The mapping of landforms in the Gulf of Naples is fundamental to understanding the recent evolution of this perithyrrenian basin controlled by several systems of Quaternary faults and characterised by the presence of the Campi Flegrei and Somma Vesuvius volcanoes. In this paper a 1:85,000 map of the recent evolution of the Gulf of Naples coasts is presented. This cartographic product has been obtained using a compilation of previously published geoarchaeological coastal studies integrated with new field data. The morphogenetic map suggests a differential evolution of various coastal stretches over the past 2000 years driven not only by measured vertical ground movements and eustatic sea-level rise (of 1 m) but also by eruptions of Mt. Vesuvius, in particular the Plinian eruption of 79 AD and the subsequent reworking of it’s products, as well as by the erosive action of the sea.</p

Multidisciplinary approach for fault detection: Integration of PS-InSAR, geomorphological, stratigraphic and structural data in the Venafro intermontane basin (Central-Southern Apennines, Italy)

A multidisciplinary methodology, integrating stratigraphic, geomorphological and structural data, combined with GIS-aided analysis and PS-InSAR interferometric data, was applied to characterize the relationships between ground deformations and the stratigraphic and the morphostructural setting of the Venafro intermontane basin. This basin is a morphostructural depression related to NW-SE and NE-SW oriented high angle normal faults bordering and crossing it. In particular, a well-known active fault crossing the plain is the Aquae Juliae Fault, whose recent activity is evidenced by archeoseismological data. The approach applied here reveals new evidence of possible faulting, acting during the Lower to Upper Pleistocene, which has driven the morphotectonic and the environmental evolution of the basin. In particular, the tectonic setting emerging from this study highlights the influence of the NW-SE oriented extensional phase during the late Lower Pleistocene – early Middle Pleistocene, in the generation of NE-SW trending, SE dipping, high-angle faults and NW-SE trending, high-angle transtensive faults. This phase has been followed by a NE-SW extensional one, responsible for the formation of NW-SE trending, both NW and SE dipping, high-angle normal faults, and the reactivation of the oldest NE-SW oriented structures. These NW-SE trending normal faults include the Aquae Juliae Fault and a new one, unknown until now, crossing the plain between the Venafro village and the Colle Cupone Mt. (hereinafter named the Venafro-Colle Cupone Fault, VCCF). This fault has controlled deposition of the youngest sedimentary units (late Middle Pleistocene to late Upper Pleistocene) suggesting its recent activity and it is well constrained by PS-InSAR data, as testified by the increase of the subsidence rate in the hanging wall block

An integrated stratigraphical approach to the Middle Pleistocene succession of the Sessano basin (Molise, Italy)

An integrated stratigraphical approach was applied to the Sessano sedimentary succession (Molise), investigated through an 80-metre core and an 11-metre trench section. The lithostratigraphical study allowed reconstruction of the palaeoenvironmental conditions during the existence of a palaeomarsh. Based on tephrostratigraphical analysis, the significant volcanoclastic inputs recorded along the Sessano succession were correlated to the explosive activity of the nearby Roccamonfina volcano and in particular to the HKS period of activity, lasted from 546 to 364 ka. The 40Ar/39Ar age of 437.9+/-1.9 ka obtained at the base of the trench section, which stratigraphically overlaps the core succession, confirms the tephrostratigraphical model and indicates that the marsh dried up during the glacial phase of OIS 12. On this basis, the glacial-interglacial cycle recognised in the core through pollen analysis was ascribed to OIS 14 and 13, while the interglacial phase identified at the core base was tentatively ascribed to OIS 15. The duration of the marshy phase was estimated between 130 and 150 ka. The floral composition of the pollen spectra shows a more modern character with respect to coeval pollen records from Campania, confirming that the heterochronous disappearance of the last subtropical elements from Italy had a latitudinal character