Titlebook: Hypogene Karst Regions and Caves of the World; Alexander Klimchouk,Arthur N. Palmer,Philippe Audr Book 2017 Springer International Publish

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The Thermal Hypogenic Caves of Acquasanta Terme (Central Italy)on of thermal water at the main spring, located 2 km downstream, in the Tronto Valley. The speleogenetic process is mainly related to H.S oxidation, which is enhanced by the recharge of oxygenated fresh water from the surface. Cave development occurred in different phases. Early passages formed main

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Inactive Hydrothermal Hypogenic Karst in SW Sardinia (Italy)hi in Argento. Other hypogenic caves have been discovered in the mines of Campo Pisano and Monteponi (Iglesias), Mount Onixeddu (Gonnesa), and especially Masua (Iglesias). A very special case of hypogenic cave is the Corona ’e Sa Craba quartzite system, known for its barite crystals and rich in many