KARST DISTRIBUTION
(based on Vl. Popov, 1997)


Carbonate rocks: 1 - Proterozoic marbles; 2 - Triassic limestones; 3 - Jurassic limestones; 4 - Lower Cretaceous and Maastrichtian limestones; 5 - covered Lower Cretaceous and Maastrichtian limestones; 6 - Palaeogene limestones; 7 - Sarmatian limestones; 8 - covered Sarmatian limestones;
Karst cave: 9 - a cave; 10 - a cave, provided with all necessary facilities; 11 - a cave with different ice formations; 12 - a sea-cave; 13 - a precipice, deep more than 100 m;14 - a rock bridge;
Karst springs with discharge as follows: 15 - up to 100 l/sec; 16 - up to 1000 l/sec; 17 - over 1000 l/sec; Speleo-regions: 18 - a cave district boundary; 19 - a cave region boundary.


PROTECTED AREAS