1,721,147 research outputs found
Forme del carsismo classico. Tavola 58.
No full textcartografia relativa alle forme del carsismo classico
Geodiversità e conservazione della natura sul Carso triestino
No full textViene discussa la storia della protezione della natura sul Carso triestino, a partire dalla legge Belci, fino ad arrivare alla recente individuazione dei geositi e alla loro distribuzione areale in rapporto con le litologie principali. Viene evidenziato come geositi e fenomeni carsici ipogei non godano per ora di alcun tipo di vincolo. Si segnalano alcuni esempi di geositi che pur essendo all'interno di aree protette per la biodiversità, risultano alterati
Le acque del Carso Classico
No full textClassical Karst is approximately 900 km2 and extends from SE of the Isonzo River to Postumia town and it
is characterized by the large variety of karst features. For this reason, this area is the best example of karst worldwide.
Classical Karst hydrogeological model has been subdivided in three different sectors: one in which the surface waters
become underground and therefore feed the deeper karst aquifer, one in which these waters moves in the deeper part
of the aquifer and are nourished by local precipitation and one in which these waters finished in the Adriatic Sea or in
local springs that feed several small lakes and the large spring of Timavo River.
Classical Karst is marked by deep and well developed karstic features. In fact, in the Italian part of the Classical Karst
more then 3000 caves have been found. Of these, 150 are more then 100 m developed and ten of them are extended
more then 1000 m. In addition, in this area of the Karst, 80 dolines with a diameter of more then 100 m are present and
limestone karren pavements extend for several km2. Six kilometers after the Skocjan sinkhole, the Timavo underground
waters run into the deeper galleries of the Abisso dei Serpenti (Kačna Jama) located at 140 m a.s.l. Approximately 15
km southward, the Timavo waters runs at 10-20 m a.m.s.l. in the deepest part of four vertical cavities that are 300 to
370 deep and are located approximately 20 km northward of the resurgence area. One of these, the abyss of Trebiciano,
has been known for long time, whereas the others named Grotta of Kanjeduce, the abyss of the Strsinkna doline
and the Grotta Meravigliosa di Lazzaro Jerko have been discovered recently. The spring system is formed by the Timavo
Spring located in San Giovanni of Duino, the Doberdò and Pietrarossa Lakes and by small springs that feed the
Lisert and Moschenizze channels (for a total area of 30 km2) and by the coastal-marine springs along the Trieste’s Gulf
and Duino Aurisina villages (approximately 8 km). The waters in these spring system are from different aquifers that are
interconnected between them and have an average discharge capacity of 40 m3s-1 and a maximum of 175 m3s-1.
Hydrochemically these waters have similar ion concentrations. However, changes have been found in the water hardness
and in chlorine quantities. This data together with the oxygen stable isotope results allow to dive them into:
- Timavo Spring, with Alto Timavo waters (Reka River);
- Sardos e Moschenizze Sud Springs, feed by the Isonzo River waters and with waters from the Alto Timavo only during
floods;
- Sablici, Moschenizze Nord, Lisert Springs and Doberdò Lake, characterized by a dual water source: from the Timavo
River and from Isonzo River with a marked increment of these waters towards Moschenizza Nord and Doberdò Lake;
- Aurisina Spring, nourished by karstic waters and with a small contribution from the Alto Timavo
Field surveying of intertidal limestone erosion susceptibility in the Gulf of Trieste: The "geoSwim Project"
No full textNo abstract availabl
Downwearing rates of vertical limestone surfaces in the intertidal zone (Gulf of Trieste, Italy)
No full textIn 2007, we installed seven micro-erosion meter stations on a vertical limestone slab located in the intertidal
zone in the Gulf of Trieste (Italy) in order to observe rock surface changes at elevations ranging between
−0.75 m and +0.75 m m.s.l. (Furlani et al., 2010). In this paper, we present the micro-erosion metre
(MEM) data for most months between February 2008 and May 2013 and the traversing micro-erosion
metre (TMEM) data collected twice a year since 2007. The MEM and TMEM data were consistent and indicated
that the mean lowering rate ranged between 0.007 mm/yr and 0.205 mm/yr and −0.001 mm/yr and
0.260 mm/yr, according to the elevation of the stations. Maximum downwearing rates were observed in the
mid-lower intertidal zone and decreased upward and downward. The natural trend of erosion started in 2010,
after 2 years of exposure, when the slab, formerly smoothed and not colonized by marine organisms, started to
be acclimated to the local environment. After 2010, the erosion rate increased to a maximum of 0.31 mm/yr.
This value can be more representative for long-term studies and is similar to the downwearing rates locally
collected on natural limestone surfaces.
This dataset represents the first collection of downwearing rates mainly measured using MEMs, but also
TMEMs on vertical limestone surfaces in an intertidal zone and provides interesting new information for addressing
the debate on notch genesis and development. The shape of a tidal notch has been found to be consistent
with the distribution of erosion rates along the slab, even if the present-day notch was not surveyed in
the Gulf of Trieste due to the local tectonic subsidence
Paesaggi carsici nel Friuli Venezia Giulia
No full textNelFVG affiorano rocce carbonatiche per circa 1900 kmq, sono note più di 7000 cavità, zone come il Carsio Classico ed il Monte Canin sono note al mondo per la frequenza e la tipologia delle morfologie carsiche
Val Rosandra
No full textSono illustrate le peculiarità geologiche, geomorfologiche ed idrogeologiche della Val Rosandra (Trieste
Il Carso “classico” presso Trieste
No full textVengono descritte, in un ottica di divulgazione al vasto pubblico, le principali particolarità geologiche che si incontrano lungo un itinerario che attraversa l'intera provincia di Trieste, dalla Val Rosandra a Sistiana e parte del Carso goriziano
Camminando per il Carso.
No full textViene descritto un itinerario attraverso il Carso triestino e goriziano in grado di cogliere gli aspetti scientifici più importanti del carsism
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