Actualités et séminaires

The Ox Bel’Ha and Sac Actun karstic systems are among the longest coastal cave systems in the world. These systems are located around and below the city of Tulum on the east side of the Yucatan peninsula. Divers have explored and mapped them for years and obtained detailed topographical information. The caves are mainly shallow (15-30 m below surface) and form a dense network of submerged caves directly outflowing to the ocean. The rapid urban development of Tulum goes with decreasing groundwater quality in the karstic system and a new threat for the coral reef and its biodiversity.

Hydrothermal geysers are visually engaging geomorphic features that represent a rapid and occasionally violent release of energy manifested as hydrothermal fluids/vapors launched skyward. Although not completely rare worldwide, hydrothermal geysers intrigue humans now and throughout history. Fortunately for us, Yellowstone National Park is home to roughly 500 geysers, making it the most concentrated geyser field in the world. Yet, the dynamics of geyser eruptions are uncertain. Much of this uncertainty stems from a lack of knowledge of their subsurface structure.