Recently growing subaqueous flowstones: Occurrence, petrography, and growth conditions

摘要: Abstract Subaqueous flowstones have been studied in two resurgence caves Slovak Karst (southern Slovakia), namely Krasnohorska and Drienovska Caves. The litter streambeds within the distance of several hundred meters upstream from resurgences. They form laminated crusts channels underground streams flowing through caves. Layers composed columnar sparry calcite alternate with those microcrystalline calcite. latter are enriched fine, detrital, non-carbonate components, which resulted crystallization instead growth rate reaches 0.96 mg/cm 2 /day, corresponds to ca. 0.3 mm per year. Seasonal observations conducted between November 2010 September 2012 reveal that deposition subaqueous significantly depends on local hydrological conditions. During periods low flow, SI calc. values stream increase grows. Conversely, during peak flow decrease subjected destruction, both by mechanical erosion corrosion. decreasing discharge, just after flows, causes fine-grained particles, results precipitation layers. grow complete darkness atmosphere elevated CO content, similarly typical speleothems, but they fed turbulent water, calcareous tufas. Their is higher than ‘normal’ a film water seeping down; it falls range tufas, though near lower limit this range. Therefore, represent an intermediate link other speleothems tufas deposited outside cave environment.