engleski

Some deep caves in Biokovo Mountain (Croatia)

A special attention was paid to the radon concentration measurement, and to chemical analyses of ground water. According to current speleological site classifications, the caves discovered at KM 1+415, KM 1+193, and KM 1+637, are large-size vertical speleological sites (caves) of an elbow shaped morphological type, characterized by the occurrence of the so called “false bottoms”, with heigh differences of about 297 m, 268 m and 203.5 m, respectively. This is the zone of the highest tunnel overburden (from 1300 to 1380 m). This means that the deepest parts of these caverns (accessed by bats from the ground surface rather than from the tunnel) sometimes extend to 200-250 m below the tunnel line. Therefore, from the standpoint of geology, these sites can be classified among the deepest speleological sites discovered so far in Dinaric karst in Croatia The depths from the ground surface range from 1350 meters to possible 1650 meters.

karst; speleology; caves; tunnels; Croatia

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