Le Alluvioni pedemontane dell'Argentiera (Sardegna nord-occidentale)

In this note are briefly described the pebbly continental alluvia that border the eastward Paleozoic complex of Argentiera area (North-Western Sardinia). These alluvia, defined like glacis probably würmian age, were originated from two different flows, which were divergent among themselfes, in metamorfic area that constitued its hinterland

Studio dei fenomeni di dissesto della provincia di Sassari: il caso del paese di Castelsardo

In Castelsardo village have been locate two different phenomenas of trouble: the first built on eolian deposits of wurmian age and it produces some moviments dry sand flow type; on the contrary the second is rotational shift of rock and soil and it has interested the basset of ignimbritic rocks of Terziary present along the headlands on the sea in Castelsardo village

Studio dei fenomeni di dissesto della provincia di Sassari: il caso dell'abitato di San Lorenzo

In this work is described the slope instability situation in the S. Lorenzo village. The study is included in a more extensive investigation about the instability phenomena on the slopes in built-up areas in the territory of the Sassari district. Recent landslides tied to translative talus creep of actual beginning and to large slope moviments (gravitative deep deformations) of Pleistocenic age it could locate in the area of S. Lorenzo

Studio dei fenomeni di dissesto della provincia di Sassari: il caso della borgata di Tirialzu (Buddusò)

The report is included in the investigation on the unstable villages of Sassari district by National Group of defense by hidrogeological catastrophe U.U.O.O. n. 13 line n. 12. The study locates the landslide's phenomenas tied to exstraordinary events of precipitation that cause slope moviments in debris flow type, and this phenomena in unusual enough in the territory of island. It isn't a true risk but it produces to human activity heavy inconvenient

Il Giacimento di bentonite di S'Aliderru ed i suoi rapporti con l'evoluzione delle paleosuperfici della Nurra (Sardegna nord-occidentale)

The bentonite ore deposit of S'Aliderru is situated in Nurra, an interesting area where the continental conditions continue from early tertiary. This is the most important white bentonite mineralization in Italy and one of the best in Europe. The local lithological sequence is the following: Jurassic limestones as the basament, several oligocenic layers of volcanic ashes, and the covering constituted by gravels of the pediments formed in the interstadial age. It's ore body risen after alterations of cineritic deposits accumulated on the tertiary paleomorphology in a mio-pliocenic age. The entire area is presently subject to intense exploration for a complete study of this paleomorphology and its later evolution

Lo Sfruttamento delle falde freatiche nelle coltri detritiche superficiali come riserve idriche sussidiarie in regioni granitiche

The study of some catch-basins upstream to some headwaters has been carried out on the southern slope of the «Monti di Alà» chaine. The characteristics of some springs with a scarse flow have been also investigated. The data obtained allow us to frame the various source areas as gravity springs. The interception of the underground flows operated by some draining trenches has permitted, in a further moment, a considerable increase of flow, compared with the natural one. In consideration of this result, the catch basins consisting of surficial detrital sheet coming from the alteration of granites, assume a certain significance as subsidiary water reserve in some areas lacking in good aquifers as the granitic domains

Erosion and use of the Coast in the Northern Sardinia (Italy)

AbstractThe study provides an overview of coastal erosion of northern Sardinia, indicating the causes and the effects of the most relevant and identifies critical areas to the possible scenarios of extreme events. The knowledge of the state of natural balance of the coasts is essential for planning and protection in the medium-long term and requires careful evaluation of the risks and potential dangers, obtainable through geomorphological, sedimentological and meteomarine data interpretation, and degree and the human settlement type. Many of sardinians waterways are torrential and have poor solids discharges due to existence of the dams, was 393 (56 large reservoirs and 336 small reservoirs) that remove sediment to natural beach nourishment. It is enough to calculate the volume of sediment trapped from the reservoir to have a phenomenon dimension, total 4,372,933.5 m3 for Cedrino in use from 1989 to 1,085,700.0 m3 for Cixerri in activity since 1992 and 2498.226,2 m3 for Bidighinzu in use since 1959. An interference with such significant contributions to the sea involves a sedimentary deficit in the system which leads to an inevitable retreat of shorelines. For the evaluation of the areas with greater sensitivity and vulnerability, it is over considered the human load resulting from the infrastructure presence and activities along the coast and next to the river banks. It has also been decided through a questionnaire meant to assess the value of an environmental asset (in this case a stretch of coastline) which is understood as a "sense of well received" by the people, because it has become clear that the remediation or enhancement cannot be delegated to a mere technical-scientific approach but there has to be shared with the community. The integrated analysis of these factors helped to identify critical situations and vulnerabilities along the coasts of Northern Sardinia that led to the mapping of areas at risk

Hypogéisme et phénomènes de paléosismicité du Monte Acuto (Sardaigne, Italie)

Le Monte Acuto, district administratif du centre-nord de la Sardaigne, a constitué durant la Préhistoire un habitat idéal grâce à la présence d'une plaine fertile traversée par le système fluvial du Rio Mannu-Coghinas, passage naturel vers les ports marins. Les grandes nécropoles, véritables villes des morts, documentant par la pierre les installations préhistoriques témoignent de l’attrait de la région. Les hypogées du Monte Acuto ont été utilisés sur une longue période à partir de la fin du Néolithique jusqu’à l’âge du Bronze. La présente étude porte sur les relations entre les données culturelles, environnementales et spatiales issues de l’observation des hypogées ainsi que sur les effets des phénomènes de paléosismicité sur la gestion de ce type de tombes.The Monte Acuto, an administrative district of north-central Sardinia, was an ideal habitat for the human settlement due to the presence of a fertile plain crossed by the river system of the Rio Mannu-Coghinas, a natural transition to the marine landings. This is testified by great Necropolis, veritable city of the dead, documenting the characteristics of prehistoric settlements. The hypogean Monte Acuto has a long term starting from the final stages of the Neolithic to the Bronze Age. The present paper gives notice of the settlement aspects (architectural, worship) and cultural, environmental and spatial relations and phenomena of paleoseismicity encountered in the hypogeum

Heavy metals: teeth as environmental biomarkers

Aim of this study was to measure the concentration of heavy metals in tooth matrix and to determine the factors that affect their presence. During tooth development and mineralization several metals can be absorbed in the tooth matrix, thus allowing us to use them as biological markers

Colorectal Cancer Stage at Diagnosis Before vs During the COVID-19 Pandemic in Italy

IMPORTANCE Delays in screening programs and the reluctance of patients to seek medical attention because of the outbreak of SARS-CoV-2 could be associated with the risk of more advanced colorectal cancers at diagnosis. OBJECTIVE To evaluate whether the SARS-CoV-2 pandemic was associated with more advanced oncologic stage and change in clinical presentation for patients with colorectal cancer. DESIGN, SETTING, AND PARTICIPANTS This retrospective, multicenter cohort study included all 17 938 adult patients who underwent surgery for colorectal cancer from March 1, 2020, to December 31, 2021 (pandemic period), and from January 1, 2018, to February 29, 2020 (prepandemic period), in 81 participating centers in Italy, including tertiary centers and community hospitals. Follow-up was 30 days from surgery. EXPOSURES Any type of surgical procedure for colorectal cancer, including explorative surgery, palliative procedures, and atypical or segmental resections. MAIN OUTCOMES AND MEASURES The primary outcome was advanced stage of colorectal cancer at diagnosis. Secondary outcomes were distant metastasis, T4 stage, aggressive biology (defined as cancer with at least 1 of the following characteristics: signet ring cells, mucinous tumor, budding, lymphovascular invasion, perineural invasion, and lymphangitis), stenotic lesion, emergency surgery, and palliative surgery. The independent association between the pandemic period and the outcomes was assessed using multivariate random-effects logistic regression, with hospital as the cluster variable. RESULTS A total of 17 938 patients (10 007 men [55.8%]; mean [SD] age, 70.6 [12.2] years) underwent surgery for colorectal cancer: 7796 (43.5%) during the pandemic period and 10 142 (56.5%) during the prepandemic period. Logistic regression indicated that the pandemic period was significantly associated with an increased rate of advanced-stage colorectal cancer (odds ratio [OR], 1.07; 95%CI, 1.01-1.13; P = .03), aggressive biology (OR, 1.32; 95%CI, 1.15-1.53; P < .001), and stenotic lesions (OR, 1.15; 95%CI, 1.01-1.31; P = .03). CONCLUSIONS AND RELEVANCE This cohort study suggests a significant association between the SARS-CoV-2 pandemic and the risk of a more advanced oncologic stage at diagnosis among patients undergoing surgery for colorectal cancer and might indicate a potential reduction of survival for these patients