Naslov
City Geoheritage – geological and geoturistical aspect of the natural stone, examples from Zagreb (Croatia)

Autori
Fio Firi, Karmen ; Maričić, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Knjiga sažetaka – 6. hrvatski geološki kongres s međunarodnim sudjelovanjem / Abstracts Book – 6th Croatian Geological Congress with international participation / Horvat, Marija ; Matoš, Bojan ; Wacha, Lara - Zagreb : Hrvatski geološki institut, 2019, 62-63

Skup
6. hrvatski geološki kongres s međunarodnim sudjelovanjem

Mjesto i datum
Zagreb, Hrvatska, 09.10.2019. - 12.10.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
natural stones, geoheritage, geotourism, Zagreb, Croatia

Sažetak
Natural stone is one of our main raw material products for domestic and various foreign markets. It is also a way to present natural heritage and geoheritage, especially, in our case, various sedimentary deposits, which cover most parts of Croatia. All of these varieties differ in colour and petrographic characteristics and are often rich in fossil remains. As a part of the geotouristical offer, we can promote our geological knowledge not only to tourists but also to local people, schoolchildren, students, etc., as interesting facts about their city and culture. The city of Zagreb, especially its central part, exhibits various types of natural stone, which are often domestic, or from near-by areas. The main role of the stone built into a construction is to be protective, durable and decorative. Some of the main Croatian varieties of stones that can be seen on the streets and as building material include sedimentary rocks as Lithothamnium limestones and “Litavac”, various types of rudist limestones – with fragments or complete rudist bivalves, stilolitic limestones, oncolytic limestones, Lithiotis limestones etc. The main building material in Zagreb includes Lithothamnium limestone and “Litavac”, calcareous rudstones composed mainly of fragments of coralline algae, from local Bizek and Gornje Vrapče quarries. Many famous buildings (or their parts) were built from these varieties throughout our history, with the Cathedral being the most known. Unfortunately, due to the composition of the stone and its high porosity, these varieties are commonly susceptible to chemical weathering and mechanical damage, and often replaced. Rudist limestones include different varieties, with the most known white coloured Veselje unito, often wrongly named “Brač marble”. It is used as building material for different sacral and historical buildings in Croatia and neighbouring countries, including the Croatian National Bank and Croatian Association of Artists building. Stilolitic limestone, also named Kirmenjak or Pietra d'Istria, is stone of highest quality in Croatia, whose decorative criteria is pronounced when blocks are sawed perpendicular to the layers. Its durability and resistance to weathering are certified by its historical use as a building stone in Venice, where it is constantly exposed to seawater. Magmatic and metamorphic rock varieties are not common as natural stones in Croatia and are therefore mainly imported. Varieties of silicate composition are firmer and more resistant to abrasion, more durable and absorb less water compared to sedimentary rocks. Therefore, different varieties of granites (e.g., Liberecká žula from Czech Republic, Rossa Porrino from Spain), trachytes (e.g., Peperino Rosso cubes from Italy) and gabbros (e.g., Jablanica Tamni from Bosnia and Herzegovina) have been used for pavements and parts of the monuments on the main squares and streets in the Zagreb centre. Natural stones can represent a part of a geotouristical offer for any place or region. Information and knowledge concerning certain rock types, their geological age and origin, as well as exploitation methods and their possible usage can give an overview on their importance and preservation as part of cultural heritage and geoheritage.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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