Meteoric phreatic speleothems and the development of cave stratigraphy: An example from Tounj Cave, Dinarides, Croatia |
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| Authors: | Ljubomir Babi? Damir Lackovi? Nada Horvatin?I? |
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| Institution: | aInstitute of Geology and Paleontology, Department of Geology, Faculty of Science, University of Zagreb, Ul. Kralja Zvonimira 8, 10000 Zagreb, Croatia;bRu er Boškovi? Institute, Bijeni?ka c. 54, 10000 Zagreb, Croatia |
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| Abstract: | Speleothems occurring in some caves of the carbonate Dinarides line all channel surfaces, and have been deposited from meteoric waters under phreatic conditions. Such phreatic speleothemic deposition modifies common experience (l) that meteoric phreatic conditions cause dissolutional widening of cave voids, and (2) that speleothems imply vadose conditions. The phreatic speleothems described here postdate an early polygenetic evolution of the cave voids, and predate the last, vadose stage. They were likely produced during the late/postglacial warming period, when dissolved carbonate was amply supplied, and when there was much water available for saturation of underground voids. Phreatic speleothems may be used as a tool for time correlation of internal deposits, both within one cave and within a karst region. They indicate an important stage in the history of the ground-water regime of an area. In general, phreatic speleothems help in better understanding of the development of subterranean voids and related karst/palaeokarst. |
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