АУТОР / AUTHOR(S): Dražen Perica 
, Kristina Krklec
DOI: 10.46793/CSGE5.21DP
САЖЕТАК / ABSTRACT:
To measure the intensity of surface carbonate corrosion and better understand the formation of karst landscape, rock tablet method has been used since the 1950s. This simple and versatile method can be applied in all karst areas with equal reliability of measurement results. Thus, it was widely accepted among geomorphologists, and consequently, the Commission for Karst Denudation normalized its application during the 7th International Speleological Congress (held in 1977 in Sheffield, UK).
The intensity of surface carbonate corrosion was investigated in three areas (20 locations in total) that differ in their climatic, pedogeographical, and biogeographical characteristics: Northern Velebit National Park, Modrič cave area, and on the North-Dalmatian Plain. Locations of study sites range from sea level (20 m a.s.l.) to the peak zone of Northern Velebit area (1,600 m a.s.l.) and are dominantly made of carbonate rocks: limestone, breccia (Jelar beds), and conglomerate (Promina beds) with a very high proportion of older carbonate rocks, and dolomite.
The measurements were done using “standard” rock tablets and those of local lithologies. “Standard” rock tablets are made of Upper Cretaceous (Senonian) limestone from a quarry near Lipica (Slovenia) having 97.9–98.7% CaCO3. Those rock tablets are 42 mm in diameter, 3–4 mm thick, and have been used worldwide, providing relative weathering rate, and allowing comparison of results with other locations or climates. In order to obtain absolute weathering rates, we used rock tablets made of local lithologies.
КЉУЧНЕ РЕЧИ / KEYWORDS:
Northern Velebit National Park; North Dalmatian Plain; carbonate rocks; intensity of carbonate corrosion; denudation; rock tablets