![]() These ground-truthing methods support the quality and reliability of our remote sensing-derived CCEs, with accuracies of 71% and 83%, respectively. This remote-sensing derived CCEs inventory has been ground truthed with two testing datasets (101 points): i) confronting the cave register based on explorations carried out prior to this analysis, and ii) with a field-based validation in completely unexplored areas. An Analytic Hierarchy Process (AHP) was used to classify the CCE potential of these karst zones into four classes: low, medium, high, and very high potential of finding new caves. ![]() The study area has been divided in eight morpho-structural units, based on our geological and geomorphological mapping. A remote sensing analysis of 600 km² of Pleiades images (acquired in 2018 by courtesy of European Space Agency) at a spatial resolution of 0.5 m (panchromatic) and 2 m (RGB and near-infrared bands) and DTMs extracted from stereographic couples has allowed to map the lithological units, the drainage network, and the candidate cave entrances (CCEs) of most of the Cordillera de la Sal. ![]() The complete lack of vegetation makes this area a perfect analogue to extraterrestrial evaporite karst areas. Despite the rare occurrence of rain events, these salt rock beds host well-developed and scientifically interesting underground cave systems, perfectly adapted to the contemporary drainage network. This ridge contains important Oligocene-Miocene continental sediments including thick interbedded salt rock units which form extensive outcrops. In this day and age, most encounters with La Lechuza occur when she swoops down on cars that are driving on a deserted road late at night.The Cordillera de la Sal (CDS) is a NNE-SSW elongated fold-and-thrust belt several km wide and over 100 km long located in the hyper-arid climate of the Atacama Desert. Once she has them in her sights, she swoops down on the confused and frightened individual and carries them off to her lair, where she may devour them at her leisure. And anyone who attempts to locate the source of the sound risks their lives, for they may become the Witch Bird’s next meal. It is said that when Lechuza locates her prey, she perches herself in a hidden area, and will then commence making strange whistling sounds or an eerie sound resembling the crying of a newborn baby. La Lechuza uses sound that bears a supernatural compulsion to lure her prey to her. Every night, she is said to transform into a five to six-foot tall bird (most commonly an owl) with the face of a beautiful or wizened old woman and enormous wings. In others, she is a woman that has sold her soul to the Devil in order to gain supernatural powers. Sometimes, she is the ghost of a woman who was widowed by a man who remarried, or was the devoted wife of an unfaithful husband. Legends say that she returned from beyond the grave as a ghost to seek revenge upon those who murdered her in the form of a human-sized bird with a woman’s face. ![]() La Lechuza, the Witch Owl, is said to be a witch that can shape-shift into an owl and is well-known throughout Mexico and Texas.Īccording to legend, La Lechuza was once a curandera (someone who practices white magic) who, after being exposed as a witch (or bruja), was killed by the angry and frightened townspeople.
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